carmi/src/__tests__/strings.js

const {compile, and, or, root, arg0, arg1, setter, splice, bind, chain, template} = require('../../index');
const {
  describeCompilers,
  evalOrLoad,
  currentValues,
  funcLibrary,
  expectTapFunctionToHaveBeenCalled,
  rand
} = require('../test-utils');
const _ = require('lodash');

describe('testing string functions', () => {
  describeCompilers(['simple', 'optimizing', 'bytecode'], compiler => {
    function testStringFunction(str, func, args, expected) {
      it(`string function: ${func}`, () => {
        const model = {transform: root.map(val => val[func](...args).call('tap'))};
        const optCode = evalOrLoad(compile(model, {compiler}));
        const inst = optCode([str], funcLibrary);
        expect(inst.transform[0]).toEqual(expected);
        expectTapFunctionToHaveBeenCalled(inst.$model.length, compiler);
      });
    }

    testStringFunction('abc', 'endsWith', ['c'], true);
    testStringFunction('abcde', 'substring', [1, 3], 'bc');
    testStringFunction('abcde', 'toUpperCase', [], 'ABCDE');
    testStringFunction('abcDE', 'toLowerCase', [], 'abcde');
    testStringFunction('0xff', 'parseInt', [16], 255);
    testStringFunction('0.3asd', 'parseFloat', [], 0.3);
    testStringFunction('0.8', 'parseFloat', [], 0.8);
    testStringFunction('abcde', 'stringLength', [], 5)

    describe('String.split', () => {
      testStringFunction('ab/cd/e', 'split', ['/'], ['ab', 'cd', 'e']);
      testStringFunction('ab', 'split', ['/'], ['ab']);
      //String.split(RegExp) does not work yet:
      //testStringFunction('abfoobar', 'split', [/foo/], ['ab', 'bar'])
    });
  });

  describe('template', () => {
    it('should concatenate hardcoded strings and expressions', () => {
      const model = {
        output: template`Hello ${root}`
      }
      const input = 'World'

      expect(evalOrLoad(compile(model))(input).output).toEqual('Hello World')
    })

    it('should concatenate multiple hardcoded strings and expressions', () => {
      const model = {
        output: template`Hello ${root.get('firstName')} ${root.get('lastName')}! Your template is ${root.get('template')}`
      }
      const input = {
        firstName: 'Netanel',
        lastName: 'Gilad',
        template: 'cool'
      }

      expect(evalOrLoad(compile(model))(input).output).toEqual('Hello Netanel Gilad! Your template is cool')
    })
  })
});