Function _assert

test/jasmine/tests/histogram_test.js:198–236

(msg, exp, warnMsg)

        });

        function _assert(msg, exp, warnMsg) {
            var allBinOpts = gd._fullLayout._histogramBinOpts;
            var groups = Object.keys(allBinOpts);

            expect(groups.length).toBe(exp.length, 'same # of bin groups| ' + msg);

            var eGroups = exp.map(function(expi) { return expi[0]; });
            expect(groups).toEqual(eGroups, 'same bin groups| ' + msg);

            exp.forEach(function(expi) {
                var k = expi[0];
                var binOpts = allBinOpts[k];

                if(!binOpts) {
                    return fail('bingroup ' + k + ' does NOT exist| ' + msg);
                }

                var traces = binOpts.traces || [];

                if(!traces.length) {
                    return fail('traces list for bingroup ' + k + ' is empty| ' + msg);
                }

                expect(traces.length).toBe(expi[1].length, 'same # of tracked traces|' + msg);

                traces.forEach(function(t, i) {
                    expect(t.index)
                        .toBe(expi[1][i], 'tracks same traces[' + i + ']|' + msg);
                    expect(t['_' + binOpts.dirs[i] + 'bingroup'])
                        .toBe(k, '_(x|y)bingroup key in trace' + i + '| ' + msg);
                });
            });

            if(warnMsg) {
                expect(Lib.warn).toHaveBeenCalledWith(warnMsg);
            } else {
                expect(Lib.warn).toHaveBeenCalledTimes(0);
            }
        }

        it('should group traces w/ same axes and w/ same orientation', function() {
            var barModes = ['group', 'stack'];