jasmine/spec/core/matchers/toBeSpec.js

describe('toBe', function() {
  it('passes with no message when actual === expected', function() {
    const matchersUtil = new privateUnderTest.MatchersUtil();
    const matcher = privateUnderTest.matchers.toBe(matchersUtil);
    const result = matcher.compare(1, 1);
    expect(result.pass).toBe(true);
  });

  it('passes with a custom message when expected is an array', function() {
    const matchersUtil = new privateUnderTest.MatchersUtil({
      pp: privateUnderTest.makePrettyPrinter()
    });
    const matcher = privateUnderTest.matchers.toBe(matchersUtil);
    const array = [1];

    const result = matcher.compare(array, array);
    expect(result.pass).toBe(true);
    expect(result.message).toBe(
      'Expected [ 1 ] not to be [ 1 ]. Tip: To check for deep equality, use .toEqual() instead of .toBe().'
    );
  });

  it('passes with a custom message when expected is an object', function() {
    const matchersUtil = new privateUnderTest.MatchersUtil({
      pp: privateUnderTest.makePrettyPrinter()
    });
    const matcher = privateUnderTest.matchers.toBe(matchersUtil);
    const obj = { foo: 'bar' };

    const result = matcher.compare(obj, obj);
    expect(result.pass).toBe(true);
    expect(result.message).toBe(
      "Expected Object({ foo: 'bar' }) not to be Object({ foo: 'bar' }). Tip: To check for deep equality, use .toEqual() instead of .toBe()."
    );
  });

  it('fails with no message when actual !== expected', function() {
    const matchersUtil = new privateUnderTest.MatchersUtil();
    const matcher = privateUnderTest.matchers.toBe(matchersUtil);
    const result = matcher.compare(1, 2);
    expect(result.pass).toBe(false);
    expect(result.message).toBeUndefined();
  });

  it('fails with a custom message when expected is an array', function() {
    const matchersUtil = new privateUnderTest.MatchersUtil({
      pp: privateUnderTest.makePrettyPrinter()
    });
    const matcher = privateUnderTest.matchers.toBe(matchersUtil);
    const result = matcher.compare([1], [1]);

    expect(result.pass).toBe(false);
    expect(result.message).toBe(
      'Expected [ 1 ] to be [ 1 ]. Tip: To check for deep equality, use .toEqual() instead of .toBe().'
    );
  });

  it('fails with a custom message when expected is an object', function() {
    const matchersUtil = new privateUnderTest.MatchersUtil({
      pp: privateUnderTest.makePrettyPrinter()
    });
    const matcher = privateUnderTest.matchers.toBe(matchersUtil);
    const result = matcher.compare({ foo: 'bar' }, { foo: 'bar' });

    expect(result.pass).toBe(false);
    expect(result.message).toBe(
      "Expected Object({ foo: 'bar' }) to be Object({ foo: 'bar' }). Tip: To check for deep equality, use .toEqual() instead of .toBe()."
    );
  });

  it('works with custom object formatters when expected is an object', function() {
    const formatter = function(x) {
      return '<' + x.foo + '>';
    };
    const prettyPrinter = privateUnderTest.makePrettyPrinter([formatter]);
    const matchersUtil = new privateUnderTest.MatchersUtil({
      pp: prettyPrinter
    });
    const matcher = privateUnderTest.matchers.toBe(matchersUtil);
    const result = matcher.compare({ foo: 'bar' }, { foo: 'bar' });

    expect(result.pass).toBe(false);
    expect(result.message).toBe(
      'Expected <bar> to be <bar>. Tip: To check for deep equality, use .toEqual() instead of .toBe().'
    );
  });
});