import { EmptyTree } from "@angular-devkit/schematics";
import { UnitTestTree } from "@angular-devkit/schematics/testing";
import * as fs from "fs";
import * as path from "path";
import {
    ClassChanges,
    BindingChanges,
    SelectorChanges,
    ThemeChanges,
    ImportsChanges,
    ElementType,
    ThemeType,
} from "./schema";
import {
    UpdateChanges,
    InputPropertyType,
    BoundPropertyObject,
} from "./UpdateChanges";
import * as tsUtils from "./tsUtils";

describe("UpdateChanges", () => {
    let appTree: UnitTestTree;

    class UnitUpdateChanges extends UpdateChanges {
        public getSelectorChanges() {
            return this.selectorChanges;
        }
        public getClassChanges() {
            return this.classChanges;
        }
        public getOutputChanges() {
            return this.outputChanges;
        }
        public getInputChanges() {
            return this.inputChanges;
        }
        public getThemeChanges() {
            return this.themeChanges;
        }
        public getImportsChanges() {
            return this.importsChanges;
        }
    }

    beforeEach(() => {
        appTree = new UnitTestTree(new EmptyTree());
        appTree.create(
            "/angular.json",
            JSON.stringify({
                projects: {
                    testProj: {
                        sourceRoot: "/",
                    },
                },
            })
        );
    });

    it("should replace/remove components", (done) => {
        const selectorsJson: SelectorChanges = {
            changes: [
                {
                    type: "component" as any,
                    selector: "igx-component",
                    replaceWith: "igx-replaced",
                },
                {
                    type: "component" as any,
                    selector: "igx-remove",
                    remove: true,
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "selectors.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn(fs, "readFileSync").and.returnValue(
            JSON.stringify(selectorsJson)
        );

        appTree.create(
            "test.component.html",
            "<igx-component> <content> <igx-remove></igx-remove> </igx-component> <igx-remove> <content> </igx-remove>"
        );
        appTree.create(
            "test2.component.html",
            "<igx-remove attr></igx-remove><igx-component>"
        );
        appTree.create(
            "test3.component.html",
            "<igx-remove-me-not attr></igx-remove-me-not> <igx-component> <igx-component-child></igx-component-child> </igx-component>"
        );

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getSelectorChanges()).toEqual(selectorsJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            "<igx-replaced> <content>  </igx-replaced> "
        );
        expect(appTree.readContent("test2.component.html")).toEqual(
            "<igx-replaced>"
        );
        expect(appTree.readContent("test3.component.html")).toEqual(
            "<igx-remove-me-not attr></igx-remove-me-not> <igx-replaced> <igx-component-child></igx-component-child> </igx-replaced>"
        );
        done();
    });

    it("should replace/remove directives", (done) => {
        const selectorsJson: SelectorChanges = {
            changes: [
                {
                    type: "directive" as any,
                    selector: "igxDirective",
                    replaceWith: "igxReplaced",
                },
                {
                    type: "directive" as any,
                    selector: "igxRemove",
                    remove: true,
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "selectors.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn(fs, "readFileSync").and.returnValue(
            JSON.stringify(selectorsJson)
        );

        appTree.create(
            "test.component.html",
            `<igx-component [igxDirective]="val" igxRemove> <content igxDirective [igxRemove]="val"> </igx-component>` +
                `<igx-component2 [igxRemove]='val'> <content> </igx-component2>`
        );

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(update.getSelectorChanges()).toEqual(selectorsJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<igx-component [igxReplaced]="val"> <content igxReplaced> </igx-component>` +
                `<igx-component2> <content> </igx-component2>`
        );
        done();
    });

    it("should replace/remove outputs", (done) => {
        const outputJson: BindingChanges = {
            changes: [
                {
                    name: "onReplaceMe",
                    replaceWith: "replaced",
                    owner: { type: "component" as any, selector: "comp" },
                },
                {
                    name: "onOld",
                    remove: true,
                    owner: { type: "component" as any, selector: "another" },
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "outputs.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(outputJson)
        );

        const fileContent = `<one (onReplaceMe)="a"> <comp\r\ntag (onReplaceMe)="dwdw" (onOld)=""> </other> <another (onOld)="b" />`;
        appTree.create("test.component.html", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getOutputChanges()).toEqual(outputJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<one (onReplaceMe)="a"> <comp\r\ntag (replaced)="dwdw" (onOld)=""> </other> <another />`
        );

        // should only match the defined selector #11666
        const fileContent2 = `<comp (onReplaceMe)="a"> <comp-not-same (onReplaceMe)="..NOT"> <another (onOld)="b" /> <another-diff (onOld)="toKeep" />`;
        appTree.overwrite("test.component.html", fileContent2);
        update.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<comp (replaced)="a"> <comp-not-same (onReplaceMe)="..NOT"> <another /> <another-diff (onOld)="toKeep" />`
        );

        outputJson.changes[0].owner = {
            type: "directive" as any,
            selector: "tag",
        };
        outputJson.changes[1].owner = {
            type: "directive" as any,
            selector: "tag",
        };
        appTree.overwrite("test.component.html", fileContent);
        const update2 = new UnitUpdateChanges(__dirname, appTree);
        update2.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<one (onReplaceMe)="a"> <comp\r\ntag (replaced)="dwdw"> </other> <another (onOld)="b" />`
        );
        done();
    });

    it("should replace/remove inputs", (done) => {
        const inputJson: BindingChanges = {
            changes: [
                {
                    name: "replaceMe",
                    replaceWith: "replaced",
                    owner: { type: "component" as any, selector: "comp" },
                },
                {
                    name: "oldProp",
                    remove: true,
                    owner: { type: "component" as any, selector: "another" },
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "inputs.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(inputJson)
        );

        let fileContent = `<one [replaceMe]="a"> <comp\r\ntag [replaceMe]="dwdw" [oldProp]=''> </other> <another oldProp="b" />`;
        appTree.create("test.component.html", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getInputChanges()).toEqual(inputJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<one [replaceMe]="a"> <comp\r\ntag [replaced]="dwdw" [oldProp]=''> </other> <another />`
        );

        inputJson.changes[1].remove = false;
        inputJson.changes[1].replaceWith = "oldReplaced";
        appTree.overwrite("test.component.html", fileContent);
        const update2 = new UnitUpdateChanges(__dirname, appTree);
        update2.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<one [replaceMe]="a"> <comp\r\ntag [replaced]="dwdw" [oldProp]=''> </other> <another oldReplaced="b" />`
        );
        inputJson.changes[1].remove = true;

        inputJson.changes[0].owner = {
            type: "directive" as any,
            selector: "tag",
        };
        inputJson.changes[1].owner = {
            type: "directive" as any,
            selector: "tag",
        };
        appTree.overwrite("test.component.html", fileContent);
        const update3 = new UnitUpdateChanges(__dirname, appTree);
        update3.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<one [replaceMe]="a"> <comp\r\ntag [replaced]="dwdw"> </other> <another oldProp="b" />`
        );

        inputJson.changes[1].owner = {
            type: "component" as any,
            selector: "another",
        };
        inputJson.changes[0].owner = {
            type: "component" as any,
            selector: "comp",
        };
        const fileContent2 = `<comp\r\ntag [oldProp]="g" [replaceMe]="NOT.replaceMe" ><another oldProp="g" [otherProp]="oldProp" /></comp>`;
        appTree.overwrite("test.component.html", fileContent2);
        const update4 = new UnitUpdateChanges(__dirname, appTree);
        update4.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<comp\r\ntag [oldProp]="g" [replaced]="NOT.replaceMe" ><another [otherProp]="oldProp" /></comp>`
        );

        fileContent = `<span [bait]="replaceMe"><ng-container ngProjectAs="comp"> sike! </ng-container></span>`;
        appTree.overwrite("test.component.html", fileContent);
        update4.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<span [bait]="replaceMe"><ng-container ngProjectAs="comp"> sike! </ng-container></span>`
        );

        // should only match the defined selector #11666
        fileContent = `<comp [replaceMe]="dwdw"> <comp-not-same [replaceMe]="..NOT"> <another oldProp="b" /> <another-diff oldProp="toKeep" />`;
        appTree.overwrite("test.component.html", fileContent);
        update4.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<comp [replaced]="dwdw"> <comp-not-same [replaceMe]="..NOT"> <another /> <another-diff oldProp="toKeep" />`
        );

        done();
    });

    it("should replace class identifiers", (done) => {
        const classJson: ClassChanges = {
            changes: [
                {
                    name: "igxClass",
                    replaceWith: "igxReplace",
                },
                {
                    name: "igxClass2",
                    replaceWith: "igxSecond",
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "classes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(classJson)
        );

        const fileContent = `import { igxClass, igxClass2 } from "igniteui-angular-sovn"; export class Test { prop: igxClass; prop2: igxClass2; }`;
        appTree.create("test.component.ts", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getClassChanges()).toEqual(classJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.ts")).toEqual(
            `import { igxReplace, igxSecond } from "igniteui-angular-sovn"; export class Test { prop: igxReplace; prop2: igxSecond; }`
        );

        done();
    });

    it("should replace multiple class identifier with the same value", (done) => {
        const classJson: ClassChanges = {
            changes: [
                {
                    name: "igxClass",
                    replaceWith: "igxReplace",
                },
                {
                    name: "igxClass2",
                    replaceWith: "igxReplace",
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "classes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(classJson)
        );

        const fileContent = `import { igxClass, igxClass2 } from "igniteui-angular-sovn"; export class Test { prop: igxClass; prop2: igxClass2; }`;
        appTree.create("test.component.ts", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getClassChanges()).toEqual(classJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.ts")).toEqual(
            `import { igxReplace } from "igniteui-angular-sovn"; export class Test { prop: igxReplace; prop2: igxReplace; }`
        );

        done();
    });

    it("should replace class identifiers (complex file)", (done) => {
        const classJson: ClassChanges = {
            changes: [
                { name: "IgxGridComponent", replaceWith: "IgxGridReplace" },
                { name: "IgxColumnComponent", replaceWith: "IgxColumnReplace" },
                { name: "IgxProvided", replaceWith: "IgxProvidedReplace" },
                { name: "STRING_FILTERS", replaceWith: "REPLACED_CONST" },
                { name: "IgxCsvExporterService", replaceWith: "Injected" },
                { name: "IgxExcelExporterOptions", replaceWith: "IgxNewable" },
                // partial match:
                { name: "IgxExporterOptionsBase", replaceWith: "ReturnType" },
                // no actual matches:
                { name: "NotType", replaceWith: "Nope" },
                { name: "NotAgain", replaceWith: "NopeAgain" },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "classes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(classJson)
        );

        const fileContent =
            `import { Component, Injectable, ViewChild } from "@angular/core";` +
            `import { IgxGridComponent } from "igniteui-angular-sovn";` +
            `import { IgxColumnComponent, IgxProvided, STRING_FILTERS} from "igniteui-angular-sovn";\r\n` +
            `import {` +
            `    IgxCsvExporterService,` +
            `    IgxExcelExporterOptions,` +
            `    IgxExporterOptionsBase` +
            `} from "igniteui-angular-sovn";\r\n` +
            `@Component({` +
            `    providers: [IgxProvided, RemoteService]` +
            `})` +
            `export class GridSampleComponent {` +
            `    @ViewChild("grid1", { read: IgxGridComponent }) public grid1: IgxGridComponent;` +
            `    // prop definitions to ignore:\r\n` +
            `    NotType: { NotAgain: string; extraProp: IgxExcelExporterOptions, IgxExcelExporterOptions: string } = {` +
            `        NotAgain: "hai",` +
            `        extraProp: new IgxExcelExporterOptions(),` +
            `        IgxExcelExporterOptions: "fake"` +
            `    }` +
            `    constructor(private csvExporterService: IgxCsvExporterService) { }` +
            `    public initColumns(event: IgxColumnComponent) {` +
            `        const column: IgxColumnComponent = event;` +
            `        this.grid1.filter("ProductName", "Queso", STRING_FILTERS.contains, true);` +
            `    }` +
            `    private getOptions(fileName: string): IgxExporterOptionsBase {` +
            `        return new IgxExcelExporterOptions(fileName);` +
            `    }` +
            `}`;
        appTree.create("test.component.ts", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getClassChanges()).toEqual(classJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.ts")).toEqual(
            `import { Component, Injectable, ViewChild } from "@angular/core";` +
                `import { IgxGridReplace } from "igniteui-angular-sovn";` +
                `import { IgxColumnReplace, IgxProvidedReplace, REPLACED_CONST} from "igniteui-angular-sovn";\r\n` +
                `import {` +
                `    Injected,` +
                `    IgxNewable,` +
                `    ReturnType` +
                `} from "igniteui-angular-sovn";\r\n` +
                `@Component({` +
                `    providers: [IgxProvidedReplace, RemoteService]` +
                `})` +
                `export class GridSampleComponent {` +
                `    @ViewChild("grid1", { read: IgxGridReplace }) public grid1: IgxGridReplace;` +
                `    // prop definitions to ignore:\r\n` +
                `    NotType: { NotAgain: string; extraProp: IgxNewable, IgxExcelExporterOptions: string } = {` +
                `        NotAgain: "hai",` +
                `        extraProp: new IgxNewable(),` +
                `        IgxExcelExporterOptions: "fake"` +
                `    }` +
                `    constructor(private csvExporterService: Injected) { }` +
                `    public initColumns(event: IgxColumnReplace) {` +
                `        const column: IgxColumnReplace = event;` +
                `        this.grid1.filter("ProductName", "Queso", REPLACED_CONST.contains, true);` +
                `    }` +
                `    private getOptions(fileName: string): ReturnType {` +
                `        return new IgxNewable(fileName);` +
                `    }` +
                `}`
        );

        done();
    });

    it("should correctly ignore types not from igniteui-angular-sovn", () => {
        const classJson: ClassChanges = {
            changes: [
                { name: "Name", replaceWith: "NameName" },
                { name: "Another", replaceWith: "Other" },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "classes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(classJson)
        );

        const fileContent = `import { Name } from ""; import { Another } from "@space/package"; export class Test { prop: Name; prop2: Another; }`;
        appTree.create("test.component.ts", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(update.getClassChanges()).toEqual(classJson);

        spyOn(tsUtils, "getRenamePositions").and.callThrough();

        update.applyChanges();
        expect(tsUtils.getRenamePositions).toHaveBeenCalledWith(
            "/test.component.ts",
            "Name",
            jasmine.anything()
        );
        expect(tsUtils.getRenamePositions).toHaveBeenCalledWith(
            "/test.component.ts",
            "Another",
            jasmine.anything()
        );
        expect(appTree.readContent("test.component.ts")).toEqual(fileContent);
    });

    it("should correctly rename aliased imports and handle collision from other packages", () => {
        const classJson: ClassChanges = {
            changes: [
                { name: "Type", replaceWith: "IgxType" },
                { name: "Size", replaceWith: "IgxSize" },
                { name: "IgxService", replaceWith: "IgxService1" },
                { name: "IgxDiffService", replaceWith: "IgxNewDiffService" },
                { name: "Calendar", replaceWith: "CalendarActual" },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "classes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(classJson)
        );

        let fileContent = `import { Size, Type as someThg } from "igniteui-angular-sovn";
import { IgxService, IgxDiffService as eDiffService, Calendar as Calendar } from 'igniteui-angular-sovn';
import { Type } from "@angular/core";
export class Test {
    prop: Type;
    prop1: someThg;
    prop2: Size = { prop: "Size" };
    secondary: eDiffService;
    cal: Calendar;

    constructor (public router: Router, private _iconService: IgxService) {}
}`;
        appTree.create("test.component.ts", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getClassChanges()).toEqual(classJson);

        update.applyChanges();
        let expectedFileContent = `import { IgxSize, IgxType as someThg } from "igniteui-angular-sovn";
import { IgxService1, IgxNewDiffService as eDiffService, CalendarActual as Calendar } from 'igniteui-angular-sovn';
import { Type } from "@angular/core";
export class Test {
    prop: Type;
    prop1: someThg;
    prop2: IgxSize = { prop: "Size" };
    secondary: eDiffService;
    cal: Calendar;

    constructor (public router: Router, private _iconService: IgxService1) {}
}`;
        expect(appTree.readContent("test.component.ts")).toEqual(
            expectedFileContent
        );

        // with ig feed package:
        fileContent = fileContent.replace(
            /igniteui-angular-sovn/g,
            "@infragistics/igniteui-angular-sovn"
        );
        expectedFileContent = expectedFileContent.replace(
            /igniteui-angular-sovn/g,
            "@infragistics/igniteui-angular-sovn"
        );
        appTree.overwrite("test.component.ts", fileContent);
        update.applyChanges();
        expect(appTree.readContent("test.component.ts")).toEqual(
            expectedFileContent
        );
    });

    it("should move property value between element tags", (done) => {
        const inputJson: BindingChanges = {
            changes: [
                {
                    name: "name",
                    moveBetweenElementTags: true,
                    conditions: ["igxIcon_is_material_name"],
                    owner: { type: "component" as any, selector: "igx-icon" },
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "inputs.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(inputJson)
        );

        const fileContent = `<igx-icon fontSet='material' name='phone'></igx-icon>
<igx-icon fontSet="material-icons" name="build"></igx-icon>
<igx-icon name="accessory"></igx-icon>`;
        appTree.create("test.component.html", fileContent);

        const fileContent1 = `<igx-icon fontSet="material" [name]="'phone'"></igx-icon>
<igx-icon fontSet="material-icons" [name]="getName()"></igx-icon>`;
        appTree.create("test1.component.html", fileContent1);

        const update = new UnitUpdateChanges(__dirname, appTree);
        update.addCondition("igxIcon_is_material_name", () => true);

        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getInputChanges()).toEqual(inputJson);

        update.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<igx-icon fontSet='material'>phone</igx-icon>
<igx-icon fontSet="material-icons">build</igx-icon>
<igx-icon>accessory</igx-icon>`
        );

        expect(appTree.readContent("test1.component.html")).toEqual(
            `<igx-icon fontSet="material">{{'phone'}}</igx-icon>
<igx-icon fontSet="material-icons">{{getName()}}</igx-icon>`
        );

        done();
    });

    it("should replace/remove properties", (done) => {
        const themeChangesJson: ThemeChanges = {
            changes: [
                {
                    name: "$replace-me",
                    replaceWith: "$replaced",
                    owner: "igx-theme-func",
                    type: ThemeType.Property,
                },
                {
                    name: "$remove-me",
                    remove: true,
                    owner: "igx-theme-func",
                    type: ThemeType.Property,
                },
                {
                    name: "$old-prop",
                    remove: true,
                    owner: "igx-comp-theme",
                    type: ThemeType.Property,
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "theme-changes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(themeChangesJson)
        );

        const fileContent = `$var: igx-theme-func(
    $prop1: red,
    $replace-me: 3,
    $remove-me: 0px,
    $prop2: 2
);
$var2: igx-comp-theme(
    $replace-me: not,
    $old-prop: func(val)
);

$var3: igx-comp-theme(
    $replace-me: not,
    $old-prop: func(val, 3, 4),
    $prop3: 1
);`;
        appTree.create("styles.scss", fileContent);
        appTree.create(
            "src/app/app.component.scss",
            `igx-comp-theme($replace-me: not, $old-prop: 3, $prop3: 2);`
        );
        appTree.create(
            "test.component.scss",
            `igx-theme-func($replace-me: 10px, $old-prop: 3, $prop3: 2);`
        );

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getThemeChanges()).toEqual(themeChangesJson);

        update.applyChanges();
        expect(appTree.readContent("styles.scss")).toEqual(
            `$var: igx-theme-func(
    $prop1: red,
    $replaced: 3,
    $prop2: 2
);
$var2: igx-comp-theme(
    $replace-me: not
);

$var3: igx-comp-theme(
    $replace-me: not,
    $prop3: 1
);`
        );
        expect(appTree.readContent("src/app/app.component.scss")).toEqual(
            `igx-comp-theme($replace-me: not, $prop3: 2);`
        );
        expect(appTree.readContent("test.component.scss")).toEqual(
            `igx-theme-func($replaced: 10px, $old-prop: 3, $prop3: 2);`
        );
        done();
    });

    it("should replace imports", (done) => {
        const importsJson: ImportsChanges = {
            changes: [
                {
                    name: "IgxIconModule.forRoot()",
                    replaceWith: "IgxIconModule",
                },
                {
                    name: "module1",
                    replaceWith: "module2",
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "imports.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(importsJson)
        );

        const fileContent = `
@NgModule({
    declarations: components,
    imports: [
        IgxIconModule.forRoot(),
        IgxGridModule,
        IgxTreeGridModule,
        module1
    ],
    providers: [
        LocalService,
    ],
    bootstrap: [AppComponent]
})
export class AppModule { }`;
        appTree.create("app.module.ts", fileContent);

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getImportsChanges()).toEqual(importsJson);

        update.applyChanges();
        expect(appTree.readContent("app.module.ts")).toEqual(`
@NgModule({
    declarations: components,
    imports: [
        IgxIconModule,
        IgxGridModule,
        IgxTreeGridModule,
        module2
    ],
    providers: [
        LocalService,
    ],
    bootstrap: [AppComponent]
})
export class AppModule { }`);

        done();
    });

    it("should handle changes with valueTransform functions", (done) => {
        const inputsJson: BindingChanges = {
            changes: [
                {
                    name: "someProp",
                    replaceWith: "someOtherProp",
                    valueTransform: "some_prop_transform",
                    owner: {
                        selector: "igx-component",
                        type: ElementType.Component,
                    },
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "inputs.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn(fs, "readFileSync").and.returnValue(JSON.stringify(inputsJson));

        // bracketed
        appTree.create(
            "test.component.html",
            '<igx-component [someProp]="true"></igx-component>'
        );

        // No brackets
        appTree.create(
            "test2.component.html",
            '<igx-component someProp="otherVal"></igx-component>'
        );

        // Small quotes
        appTree.create(
            "test3.component.html",
            `<igx-component someProp='otherVal'></igx-component>`
        );

        // Multiple occurances
        appTree.create(
            "test4.component.html",
            `<igx-component [someProp]="true"><igx-component>
<igx-component [someProp]="false" [someProp]="false" [someProp]="false" [someProp]="false"><igx-component>
<igx-component someProp="true"><igx-component>
<igx-component someProp="false"><igx-component>`
        );

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getInputChanges()).toEqual(inputsJson);
        update.addValueTransform(
            "some_prop_transform",
            (args: BoundPropertyObject): void => {
                if (args.bindingType === InputPropertyType.EVAL) {
                    args.value =
                        args.value === "true" ? "'trueValue'" : "'falseValue'";
                } else {
                    args.value =
                        args.value === "true" ? "trueValue" : "falseValue";
                }
            }
        );

        update.applyChanges();
        expect(appTree.readContent("test.component.html")).toEqual(
            `<igx-component [someOtherProp]="'trueValue'"></igx-component>`
        );
        expect(appTree.readContent("test2.component.html")).toEqual(
            `<igx-component someOtherProp="falseValue"></igx-component>`
        );
        expect(appTree.readContent("test3.component.html")).toEqual(
            `<igx-component someOtherProp='falseValue'></igx-component>`
        );
        expect(appTree.readContent("test4.component.html")).toEqual(
            `<igx-component [someOtherProp]="'trueValue'"><igx-component>\n` +
                // eslint-disable-next-line max-len
                `<igx-component [someOtherProp]="'falseValue'" [someOtherProp]="'falseValue'" [someOtherProp]="'falseValue'" [someOtherProp]="'falseValue'"><igx-component>
<igx-component someOtherProp="trueValue"><igx-component>
<igx-component someOtherProp="falseValue"><igx-component>`
        );
        done();
    });

    it("Should be able to change binding type via transform function", (done) => {
        const inputsJson: BindingChanges = {
            changes: [
                {
                    name: "prop",
                    replaceWith: "newProp",
                    valueTransform: "prop_transform",
                    owner: {
                        selector: "igx-component",
                        type: ElementType.Component,
                    },
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "inputs.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn(fs, "readFileSync").and.returnValue(JSON.stringify(inputsJson));

        // bracketed
        appTree.create(
            "test-bound-to-string.component.html",
            `<igx-component [prop]="true">STRING</igx-component>
<igx-component [prop]="false">STRING</igx-component>
<igx-component [prop]="someOtherProperty">BOUND</igx-component>`
        );
        appTree.create(
            "test-string-to-bound.component.html",
            `<igx-component prop="changeThisToBound">BOUND</igx-component>
<igx-component prop="leaveMeBe">STRING</igx-component>`
        );

        const update = new UnitUpdateChanges(__dirname, appTree);
        expect(fs.existsSync).toHaveBeenCalledWith(jsonPath);
        expect(fs.readFileSync).toHaveBeenCalledWith(jsonPath, "utf-8");
        expect(update.getInputChanges()).toEqual(inputsJson);
        update.addValueTransform(
            "prop_transform",
            (args: BoundPropertyObject): void => {
                if (args.bindingType === InputPropertyType.EVAL) {
                    switch (args.value) {
                        case "true":
                            args.value = "TRUTHY-STRING-VALUE";
                            args.bindingType = InputPropertyType.STRING;
                            break;
                        case "false":
                            args.value = "FALSY-STRING-VALUE";
                            args.bindingType = InputPropertyType.STRING;
                            break;
                        default:
                            args.value += " ? true : false";
                    }
                } else {
                    if (args.value === "changeThisToBound") {
                        args.bindingType = InputPropertyType.EVAL;
                        args.value = "true";
                    }
                }
            }
        );

        update.applyChanges();
        expect(
            appTree.readContent("test-bound-to-string.component.html")
        ).toEqual(
            `<igx-component newProp="TRUTHY-STRING-VALUE">STRING</igx-component>
<igx-component newProp="FALSY-STRING-VALUE">STRING</igx-component>
<igx-component [newProp]="someOtherProperty ? true : false">BOUND</igx-component>`
        );
        expect(
            appTree.readContent("test-string-to-bound.component.html")
        ).toEqual(
            `<igx-component [newProp]="true">BOUND</igx-component>
<igx-component newProp="leaveMeBe">STRING</igx-component>`
        );
        done();
    });

    describe("Project loading", () => {
        it("should correctly load project files", () => {
            const tsFile = "/src/component.ts";
            const htmlFile = "/src/component.html";
            const scssFile = "/src/component.scss";
            const sassFile = "/src/component.sass";
            appTree.overwrite(
                "/angular.json",
                JSON.stringify({
                    projects: {
                        testProj: {
                            sourceRoot: "/src",
                        },
                    },
                })
            );
            appTree.create(tsFile, "");
            appTree.create(htmlFile, "");
            appTree.create(scssFile, "");
            appTree.create(sassFile, "");

            // skip loading json config files
            spyOn(fs, "existsSync").and.returnValue(false);

            const update = new UnitUpdateChanges(__dirname, appTree);
            expect(update.tsFiles).toContain(tsFile);
            expect(update.templateFiles).toContain(htmlFile);
            expect(update.sassFiles).toContain(scssFile);
            expect(update.sassFiles).toContain(sassFile);
        });

        it("should correctly load multiple and library project files", () => {
            const tsFile = "component.ts";
            const htmlFile = "component.html";
            const scssFile = "component.scss";
            const sassFile = "component.sass";
            const workspace = {
                projects: {
                    testProj: {
                        projectType: "application",
                        sourceRoot: "src-one",
                    },
                    test2Proj: {
                        projectType: "application",
                        sourceRoot: "/src-two",
                    },
                    libProj: {
                        projectType: "library",
                        sourceRoot: "src-lib",
                    },
                },
            };
            appTree.overwrite("/angular.json", JSON.stringify(workspace));
            for (const projName of Object.keys(workspace.projects)) {
                const root = workspace.projects[projName].sourceRoot;
                appTree.create(path.posix.join(root, tsFile), "");
                appTree.create(path.posix.join(root, htmlFile), "");
                appTree.create(path.posix.join(root, scssFile), "");
                appTree.create(path.posix.join(root, sassFile), "");
            }

            // skip loading json config files
            spyOn(fs, "existsSync").and.returnValue(false);

            const update = new UnitUpdateChanges(__dirname, appTree);
            for (const projName of Object.keys(workspace.projects)) {
                const root = workspace.projects[projName].sourceRoot;
                expect(update.tsFiles).toContain(
                    path.posix.join(`/${root}`, tsFile)
                );
                expect(update.templateFiles).toContain(
                    path.posix.join(`/${root}`, htmlFile)
                );
                expect(update.sassFiles).toContain(
                    path.posix.join(`/${root}`, scssFile)
                );
                expect(update.sassFiles).toContain(
                    path.posix.join(`/${root}`, sassFile)
                );
            }
        });
    });

    describe("Language Service migrations", () => {
        it("Should be able to replace property of an event", () => {
            pending("set up tests for migrations through lang service");
            const fileContent = `import { Component } from '@angular/core';
import { IGridCreatedEventArgs } from 'igniteui-angular-sovn';
@Component({
  selector: 'app-custom-grid',
  template: ''
})
export class CustomGridComponent {
  public childGridCreated(event: IGridCreatedEventArgs) {
      event.grid.onGridKeydown.subscribe(() => {});
  }
}
`;
            appTree.create("test.component.ts", fileContent);
            const expectedFileContent = `import { Component } from '@angular/core';
import { IGridCreatedEventArgs } from 'igniteui-angular-sovn';
@Component({
  selector: 'app-custom-grid',
  template: ''
})
export class CustomGridComponent {
  public childGridCreated(event: IGridCreatedEventArgs) {
      event.grid.gridKeydown.subscribe(() => {});
  }
}
`;
            const update = new UnitUpdateChanges(__dirname, appTree);
            update.applyChanges();
            expect(appTree.readContent("test.component.ts")).toEqual(
                expectedFileContent
            );
        });
    });

    it("Should migrate sass variables names correctly", () => {
        const themeChangesJson: ThemeChanges = {
            changes: [
                {
                    name: "$light-material-palette",
                    replaceWith: "$igx-light-material-palette",
                    type: ThemeType.Variable,
                },
                {
                    name: "$light-palette",
                    replaceWith: "$igx-light-palette",
                    type: ThemeType.Variable,
                },
                {
                    name: "$dark-palette",
                    replaceWith: "$igx-dark-palette",
                    type: ThemeType.Variable,
                },
                {
                    name: "$color",
                    replaceWith: "$igx-color",
                    type: ThemeType.Variable,
                },
                {
                    name: "$elevation",
                    replaceWith: "$igx-elevation",
                    type: ThemeType.Variable,
                },
            ],
        };
        const jsonPath = path.join(__dirname, "changes", "theme-changes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(themeChangesJson)
        );

        const fileContent = `$palette: $light-material-palette;
$light-material-palette : $some-variable,
$palette2: $light-material-palette-primary;
$palette3: mat.define-light-theme($light-palette-primary, $elevation, $light-palette);
$palette4: $elevation;
igx-dark-theme($light-palette, $elevation);
igx-white-theme($ease-in-quad, $pick-mint: $elevation);
igx-gray-theme($quick-draw: igx-icon($elevation));
igx-yellow-theme($some-property igx-icon($another-property, $elevation));
$color: #3321;
$colorful: #3245;
$palette5: mat.define-light-theme($light-palette-primary, $elevation, $light-palette, $some-variable: $elevation);
$crm-grid-theme: igx-grid-theme($elevation: #f0f8fe, $header-border-color: #dde5eb);
$dark-theme-palette: igx-palette($primary: $dark-color, $secondary: $orange-color);
$dark-grid-theme: igx-grid-theme(
$palette: $dark-theme-palette,
$content-background: igx-color($dark-theme-palette, "secondary", 100),
$elevation: igx-color($dark-theme-palette, "primary", 500),
$header-text-color: igx-color($dark-theme-palette, "secondary", 600),
$cell-selected-background: igx-color($dark-theme-palette, "primary", 500),
$cell-selected-text-color: igx-color($dark-theme-palette, "secondary", 500),
$row-hover-background: igx-color($dark-theme-palette, "primary", 100),
$header-border-color: igx-color($dark-theme-palette, "primary", 600)
);
`;
        appTree.create("test.component.scss", fileContent);
        const expectedFileContent = `$palette: $igx-light-material-palette;
$igx-light-material-palette : $some-variable,
$palette2: $light-material-palette-primary;
$palette3: mat.define-light-theme($light-palette-primary, $igx-elevation, $igx-light-palette);
$palette4: $igx-elevation;
igx-dark-theme($igx-light-palette, $igx-elevation);
igx-white-theme($ease-in-quad, $pick-mint: $igx-elevation);
igx-gray-theme($quick-draw: igx-icon($igx-elevation));
igx-yellow-theme($some-property igx-icon($another-property, $igx-elevation));
$igx-color: #3321;
$colorful: #3245;
$palette5: mat.define-light-theme($light-palette-primary, $igx-elevation, $igx-light-palette, $some-variable: $igx-elevation);
$crm-grid-theme: igx-grid-theme($elevation: #f0f8fe, $header-border-color: #dde5eb);
$dark-theme-palette: igx-palette($primary: $dark-color, $secondary: $orange-color);
$dark-grid-theme: igx-grid-theme(
$palette: $dark-theme-palette,
$content-background: igx-color($dark-theme-palette, "secondary", 100),
$elevation: igx-color($dark-theme-palette, "primary", 500),
$header-text-color: igx-color($dark-theme-palette, "secondary", 600),
$cell-selected-background: igx-color($dark-theme-palette, "primary", 500),
$cell-selected-text-color: igx-color($dark-theme-palette, "secondary", 500),
$row-hover-background: igx-color($dark-theme-palette, "primary", 100),
$header-border-color: igx-color($dark-theme-palette, "primary", 600)
);
`;

        const update = new UnitUpdateChanges(__dirname, appTree);

        update.applyChanges();
        expect(appTree.readContent("test.component.scss")).toEqual(
            expectedFileContent
        );
    });

    it("Should migrate aliased scss functions", () => {
        const themeChangesJson: ThemeChanges = {
            changes: [
                {
                    name: "igx-elevations",
                    replaceWith: "elevations",
                    type: ThemeType.Function,
                },
                {
                    name: "igx-contrast-color",
                    replaceWith: "contrast-color",
                    type: ThemeType.Function,
                },
                {
                    name: "igx-color",
                    replaceWith: "color",
                    type: ThemeType.Function,
                },
                {
                    name: "igx-palette",
                    replaceWith: "palette",
                    type: ThemeType.Function,
                },
            ],
        };

        const jsonPath = path.join(__dirname, "changes", "theme-changes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(themeChangesJson)
        );

        const fileContent = `@use 'igniteui-angular-sovn/theming' as igniteui1;
@use 'igniteui-angular-sovn/theme' as igniteui2;
@use 'igniteui-angular-sovn/lib/core/styles/themes/index' as igniteui3;
@use 'some/url' as my-namespace;

$my-palette: igniteui1.igx-palette($primary: red, $secondary:  blue);
$my-text: igniteui3.text-contrast($background: yellow);
$my-color: igniteui2.igx-contrast-color($primary: blue, $secondary: orange);
$my-other-color: my-namespace.contrast-color($primary: white, $secondary: black, $elevation: true);
$my-other-theme: my-namespace.function1($color1: igniteui2.igx-contrast-color($palette: igniteui1.igx-palette($primary: blue, $secondary: white), $color: igniteui1.igx-color($palette: $my-palette, $color: $my-color)));
`;

        appTree.create("test.component.scss", fileContent);

        const expectedFileContent = `@use 'igniteui-angular-sovn/theming' as igniteui1;
@use 'igniteui-angular-sovn/theme' as igniteui2;
@use 'igniteui-angular-sovn/lib/core/styles/themes/index' as igniteui3;
@use 'some/url' as my-namespace;

$my-palette: igniteui1.palette($primary: red, $secondary:  blue);
$my-text: igniteui3.text-contrast($background: yellow);
$my-color: igniteui2.contrast-color($primary: blue, $secondary: orange);
$my-other-color: my-namespace.contrast-color($primary: white, $secondary: black, $elevation: true);
$my-other-theme: my-namespace.function1($color1: igniteui2.contrast-color($palette: igniteui1.palette($primary: blue, $secondary: white), $color: igniteui1.color($palette: $my-palette, $color: $my-color)));
`;

        const update = new UnitUpdateChanges(__dirname, appTree);
        update.applyChanges();
        expect(appTree.readContent("test.component.scss")).toBe(
            expectedFileContent
        );
    });

    it("should migrate non-aliased scss functions", () => {
        const themeChangesJson: ThemeChanges = {
            changes: [
                {
                    name: "igx-elevations",
                    replaceWith: "elevations",
                    type: ThemeType.Function,
                },
                {
                    name: "igx-contrast-color",
                    replaceWith: "contrast-color",
                    type: ThemeType.Function,
                },
                {
                    name: "igx-color",
                    replaceWith: "color",
                    type: ThemeType.Function,
                },
                {
                    name: "igx-palette",
                    replaceWith: "palette",
                    type: ThemeType.Function,
                },
            ],
        };

        const jsonPath = path.join(__dirname, "changes", "theme-changes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(themeChangesJson)
        );

        const fileContent = `@use 'igniteui-angular-sovn/theming' as *;
@use 'some/url' as my-namespace;

$my-palette: igx-palette($primary: red, $secondary:  blue);
$my-color: igx-contrast-color($primary: blue, $secondary: orange);
$my-text: text-contrast($background: yellow);
$my-other-color: my-namespace.contrast-color($primary: white, $secondary: black, $elevation: true);
$my-other-theme: my-namespace.function1($color1: igx-contrast-color($palette: igx-palette($primary: blue, $secondary: white), $color: igx-color($palette: $my-palette, $color: $my-color)));
`;

        appTree.create("test.component.scss", fileContent);

        const expectedFileContent = `@use 'igniteui-angular-sovn/theming' as *;
@use 'some/url' as my-namespace;

$my-palette: palette($primary: red, $secondary:  blue);
$my-color: contrast-color($primary: blue, $secondary: orange);
$my-text: text-contrast($background: yellow);
$my-other-color: my-namespace.contrast-color($primary: white, $secondary: black, $elevation: true);
$my-other-theme: my-namespace.function1($color1: contrast-color($palette: palette($primary: blue, $secondary: white), $color: color($palette: $my-palette, $color: $my-color)));
`;

        const update = new UnitUpdateChanges(__dirname, appTree);
        update.applyChanges();
        expect(appTree.readContent("test.component.scss")).toBe(
            expectedFileContent
        );
    });

    it("Should migrate aliased scss mixins", () => {
        const themeChangesJson: ThemeChanges = {
            changes: [
                {
                    name: "igx-theme",
                    replaceWith: "theme",
                    type: ThemeType.Mixin,
                },
                {
                    name: "igx-light-theme",
                    replaceWith: "light-theme",
                    type: ThemeType.Mixin,
                },
                {
                    name: "igx-dark-theme",
                    replaceWith: "dark-theme",
                    type: ThemeType.Mixin,
                },
            ],
        };

        const jsonPath = path.join(__dirname, "changes", "theme-changes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(themeChangesJson)
        );

        const fileContent = `@use 'igniteui-angular-sovn/theming' as igniteui1;
@use 'igniteui-angular-sovn/lib/core/styles/themes/index' as igniteui3;
@use 'igniteui-angular-sovn/theme' as igniteui2;
@use 'some/url' as my-namespace;

@include igniteui2.igx-light-theme($palette: $my-palette);
@include igniteui1.igx-theme($palette: $my-palette);
@include igniteui3.igx-dark-theme($elevation: $my-elevation);
@include my-namespace.theme($palette: $my-palette);
`;

        appTree.create("test.component.scss", fileContent);

        const expectedFileContent = `@use 'igniteui-angular-sovn/theming' as igniteui1;
@use 'igniteui-angular-sovn/lib/core/styles/themes/index' as igniteui3;
@use 'igniteui-angular-sovn/theme' as igniteui2;
@use 'some/url' as my-namespace;

@include igniteui2.light-theme($palette: $my-palette);
@include igniteui1.theme($palette: $my-palette);
@include igniteui3.dark-theme($elevation: $my-elevation);
@include my-namespace.theme($palette: $my-palette);
`;

        const update = new UnitUpdateChanges(__dirname, appTree);
        update.applyChanges();
        expect(appTree.readContent("test.component.scss")).toBe(
            expectedFileContent
        );
    });

    it("should migrate non-aliased scss mixins", () => {
        const themeChangesJson: ThemeChanges = {
            changes: [
                {
                    name: "igx-theme",
                    replaceWith: "theme",
                    type: ThemeType.Mixin,
                },
                {
                    name: "igx-light-theme",
                    replaceWith: "light-theme",
                    type: ThemeType.Mixin,
                },
                {
                    name: "igx-dark-theme",
                    replaceWith: "dark-theme",
                    type: ThemeType.Mixin,
                },
            ],
        };

        const jsonPath = path.join(__dirname, "changes", "theme-changes.json");
        spyOn(fs, "existsSync").and.callFake((filePath: fs.PathLike) => {
            if (filePath === jsonPath) {
                return true;
            }
            return false;
        });
        spyOn<any>(fs, "readFileSync").and.callFake(() =>
            JSON.stringify(themeChangesJson)
        );

        const fileContent = `@use 'igniteui-angular-sovn/theming' as *;
@use 'some/url' as my-namespace;

@include igx-theme($palette: $my-palette);
@include igx-light-theme($palette: $my-palette);
@include igx-dark-theme($elevation: $my-elevation);
@include my-namespace.theme($palette: $my-palette);
`;

        appTree.create("test.component.scss", fileContent);

        const expectedFileContent = `@use 'igniteui-angular-sovn/theming' as *;
@use 'some/url' as my-namespace;

@include theme($palette: $my-palette);
@include light-theme($palette: $my-palette);
@include dark-theme($elevation: $my-elevation);
@include my-namespace.theme($palette: $my-palette);
`;

        const update = new UnitUpdateChanges(__dirname, appTree);
        update.applyChanges();
        expect(appTree.readContent("test.component.scss")).toBe(
            expectedFileContent
        );
    });
});