| 1 | describe("The 'toBe' matcher compares with ===", () => {
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| 2 | it("and has a positive case ", () => {
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| 3 | expect(true).toBe(true);
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| 4 | });
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| 5 | it("and can have a negative case", () => {
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| 6 | expect(false).not.toBe(true);
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| 7 | });
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| 8 | });
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| 9 |
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| 10 | describe("Included matchers:", () => {
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| 11 | it("The 'toBe' matcher compares with ===", () => {
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| 12 | var a = 12;
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| 13 | var b = a;
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| 14 | expect(a).toBe(b);
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| 15 | expect(a).not.toBe(null);
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| 16 | });
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| 17 | describe("The 'toEqual' matcher", () => {
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| 18 | it("works for simple literals and variables", () => {
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| 19 | var a = 12;
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| 20 | expect(a).toEqual(12);
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| 21 | });
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| 22 | it("should work for objects", () => {
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| 23 | var foo = {
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| 24 | a: 12,
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| 25 | b: 34
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| 26 | };
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| 27 | var bar = {
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| 28 | a: 12,
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| 29 | b: 34
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| 30 | };
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| 31 | expect(foo).toEqual(bar);
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| 32 | });
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| 33 | });
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| 34 |
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| 35 | it("The 'toMatch' matcher is for regular expressions", () => {
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| 36 | var message = 'foo bar baz';
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| 37 | expect(message).toMatch(/bar/);
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| 38 | expect(message).toMatch('bar');
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| 39 | expect(message).not.toMatch(/quux/);
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| 40 | });
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| 41 |
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| 42 | it("The 'toBeDefined' matcher compares against `undefined`", () => {
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| 43 | var a = {
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| 44 | foo: 'foo'
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| 45 | };
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| 46 | expect(a.foo).toBeDefined();
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| 47 | expect((<any>a).bar).not.toBeDefined();
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| 48 | });
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| 49 |
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| 50 | it("The `toBeUndefined` matcher compares against `undefined`", () => {
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| 51 | var a = {
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| 52 | foo: 'foo'
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| 53 | };
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| 54 | expect(a.foo).not.toBeUndefined();
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| 55 | expect((<any>a).bar).toBeUndefined();
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| 56 | });
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| 57 |
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| 58 | it("The 'toBeNull' matcher compares against null", () => {
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| 59 | var a: string = null;
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| 60 | var foo = 'foo';
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| 61 | expect(null).toBeNull();
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| 62 | expect(a).toBeNull();
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| 63 | expect(foo).not.toBeNull();
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| 64 | });
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| 65 |
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| 66 | it("The 'toBeTruthy' matcher is for boolean casting testing", () => {
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| 67 | var a: string, foo = 'foo';
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| 68 | expect(foo).toBeTruthy();
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| 69 | expect(a).not.toBeTruthy();
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| 70 | });
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| 71 |
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| 72 | it("The 'toBeFalsy' matcher is for boolean casting testing", () => {
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| 73 | var a: string, foo = 'foo';
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| 74 | expect(a).toBeFalsy();
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| 75 | expect(foo).not.toBeFalsy();
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| 76 | });
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| 77 |
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| 78 | it("The 'toContain' matcher is for finding an item in an Array", () => {
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| 79 | var a = ['foo', 'bar', 'baz'];
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| 80 | expect(a).toContain('bar');
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| 81 | expect(a).not.toContain('quux');
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| 82 | });
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| 83 |
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| 84 | it("The 'toBeLessThan' matcher is for mathematical comparisons", () => {
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| 85 | var pi = 3.1415926, e = 2.78;
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| 86 | expect(e).toBeLessThan(pi);
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| 87 | expect(pi).not.toBeLessThan(e);
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| 88 | });
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| 89 |
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| 90 | it("The 'toBeGreaterThan' is for mathematical comparisons", () => {
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| 91 | var pi = 3.1415926, e = 2.78;
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| 92 | expect(pi).toBeGreaterThan(e);
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| 93 | expect(e).not.toBeGreaterThan(pi);
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| 94 | });
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| 95 |
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| 96 | it("The 'toBeCloseTo' matcher is for precision math comparison", () => {
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| 97 | var pi = 3.1415926, e = 2.78;
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| 98 | expect(pi).not.toBeCloseTo(e, 1);
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| 99 | expect(pi).toBeCloseTo(e, 0);
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| 100 | });
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| 101 |
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| 102 | it("The 'toThrow' matcher is for testing if a function throws an exception", () => {
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| 103 | var foo = () => {
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| 104 | return 1 + 2;
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| 105 | };
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| 106 | var bar = () => {
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| 107 | throw new Error();
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| 108 | };
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| 109 | expect(foo).not.toThrow();
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| 110 | expect(bar).toThrow();
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| 111 | });
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| 112 | });
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