to.be.true and to.be.false do not indicate line number when failing

The following code:

describe('Test feature', function() {
  it('should raise line number', function() {
    expect(true).to.be.false;
  });
});

Yields the failure:

Chrome 42.0.2311 (Mac OS X 10.10.3) Test feature should raise line number FAILED
        AssertionError: expected true to be false

This can be difficult to debug where your failure is in a test suite if no line number or file is given.

However, if you run the following code:

describe('Test feature', function() {
  it('should raise line number', function() {
    expect(true).to.equal(false);
  });
});

The line number is reported:

Chrome 42.0.2311 (Mac OS X 10.10.3) Test feature should raise line number FAILED
        AssertionError: expected true to be false
            at Context.<anonymous> (/test.js:3:27)

Version Information

mocha@2.1.0
karma@0.12.31 
karma-chai@0.1.0 
karma-mocha@0.1.10 

[keithamus]

Hey @vtsatskin thanks for the issue.

Can you try setting chai.config.includeStack = true; and seeing if that fixes the problem?

Thanks

[meeber]

The newer version of assertion-error was released. Closing!