Honour time scale min/max settings (#4522)

Author: andig

src/helpers/helpers.time.js

@@ -5,6 +5,8 @@ moment = typeof moment === 'function' ? moment : window.moment;
 
 var helpers = require('./helpers.core');
 
+var helpers = require('./helpers.core');
+
 var interval = {
 	millisecond: {
 		size: 1,
@@ -62,18 +64,28 @@ function generateTicksNiceRange(options, dataRange, niceRange) {
 		var stepValue = interval[options.unit].size * stepSize;
 		var startFraction = startRange % stepValue;
 		var alignedTick = startTick;
-		if (startFraction && majorUnit && !options.timeOpts.round && !options.timeOpts.isoWeekday) {
+
+		// first tick
+		if (startFraction && majorUnit && !options.timeOpts.round && !options.timeOpts.isoWeekday && helpers.isNullOrUndef(options.min)) {
 			alignedTick += startFraction - stepValue;
 			ticks.push(alignedTick);
 		} else {
 			ticks.push(startTick);
 		}
+
+		// generate remaining ticks
 		var cur = moment(alignedTick);
-		var realMax = options.max || niceRange.max;
+		var realMax = helpers.isNullOrUndef(options.max) ? niceRange.max : options.max;
 		while (cur.add(stepSize, options.unit).valueOf() < realMax) {
 			ticks.push(cur.valueOf());
 		}
-		ticks.push(cur.valueOf());
+
+		// last tick
+		if (helpers.isNullOrUndef(options.max)) {
+			ticks.push(cur.valueOf());
+		} else {
+			ticks.push(realMax);
+		}
 	}
 	return ticks;
 }

test/specs/scale.time.tests.js

@@ -49,17 +49,17 @@ describe('Time scale tests', function() {
 		});
 	});
 
-	it('Should load moment.js as a dependency', function() {
+	it('should load moment.js as a dependency', function() {
 		expect(window.moment).not.toBe(undefined);
 	});
 
-	it('Should register the constructor with the scale service', function() {
+	it('should register the constructor with the scale service', function() {
 		var Constructor = Chart.scaleService.getScaleConstructor('time');
 		expect(Constructor).not.toBe(undefined);
 		expect(typeof Constructor).toBe('function');
 	});
 
-	it('Should have the correct default config', function() {
+	it('should have the correct default config', function() {
 		var defaultConfig = Chart.scaleService.getScaleDefaults('time');
 		expect(defaultConfig).toEqual({
 			display: true,
@@ -372,7 +372,7 @@ describe('Time scale tests', function() {
 			config.time.min = '2014-12-29T04:00:00';
 
 			var scale = createScale(mockData, config);
-			expect(scale.ticks[0].value).toEqual('Dec 28');
+			expect(scale.ticks[0].value).toEqual('Dec 29');
 		});
 
 		it('should use the max option', function() {
@@ -381,11 +381,11 @@ describe('Time scale tests', function() {
 
 			var scale = createScale(mockData, config);
 
-			expect(scale.ticks[scale.ticks.length - 1].value).toEqual('Jan 6');
+			expect(scale.ticks[scale.ticks.length - 1].value).toEqual('Jan 5');
 		});
 	});
 
-	it('Should use the isoWeekday option', function() {
+	it('should use the isoWeekday option', function() {
 		var mockData = {
 			labels: [
 				'2015-01-01T20:00:00', // Thursday
@@ -478,7 +478,7 @@ describe('Time scale tests', function() {
 		var step = xScale.ticks[1].time - xScale.ticks[0].time;
 		var stepsAmount = Math.floor((xScale.max - xScale.min) / step);
 
-		it('should be bounded by nearest step year starts', function() {
+		it('should be bounded by nearest step\'s year start and end', function() {
 			expect(xScale.getValueForPixel(xScale.left)).toBeCloseToTime({
 				value: moment(xScale.min).startOf('year'),
 				unit: 'hour',