Material WebUI: cr-slider element for intelligent range mapping

chrome/test/data/webui/cr_elements/cr_slider_tests.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/** @fileoverview Suite of tests for cr-slider. */
+cr.define('cr_slider', function() {
+  function registerTests() {
+    suite('cr-slider', function() {
+      /** @type {!CrSliderElement} */
+      var slider;
+
+      /**
+       * paper-slider instance wrapped by cr-slider.
+       * @type {!PaperSliderElement}
+       */
+      var paperSlider;
+
+      var tickValues = [2, 4, 8, 16, 32, 64, 128];
+
+      suiteSetup(function() {
+        return PolymerTest.importHtml(
+            'chrome://resources/cr_elements/cr_slider/cr_slider.html');
+      });
+
+      setup(function() {
+        PolymerTest.clearBody();
+        slider = document.createElement('cr-slider');
+        document.body.appendChild(slider);
+        paperSlider = slider.$$('paper-slider');
+      });
+
+      test('basic properties', function() {
+        // Default properties.
+        expectEquals(1, paperSlider.step);
+        expectEquals(0, paperSlider.min);
+
+        // Configurable properties.
+        expectFalse(paperSlider.snaps);
+        slider.setAttribute('snaps', '');
+        expectTrue(paperSlider.snaps);
+
+        slider.setAttribute('max-markers', 7);
+        expectEquals(7, paperSlider.maxMarkers);
+      });
+
+      test('set value', function() {
+        slider.tickValues = tickValues;
+        slider.value = 16;
+        expectEquals(6, paperSlider.max);
+        expectEquals(3, paperSlider.value);
+        expectEquals(3, paperSlider.immediateValue);
+
+        // Setting to an in-between value should choose an index but not change
+        // the value.
+        slider.value = 70;
+        expectEquals(5, paperSlider.value);
+        expectEquals(5, paperSlider.immediateValue);
+        expectEquals(70, slider.value);
+
+        // Setting the value out-of-range should clamp the slider.
+        slider.value = -100;
+        expectEquals(0, paperSlider.value);
+        expectEquals(0, paperSlider.immediateValue);
+        expectEquals(-100, slider.value);
+      });
+
+      test('move slider', function() {
+        slider.tickValues = tickValues;
+        slider.value = 30;
+        expectEquals(4, paperSlider.value);
+
+        MockInteractions.pressAndReleaseKeyOn(
+            paperSlider, 39 /* right */);
+        expectEquals(5, paperSlider.value);
+        expectEquals(64, slider.value);
+
+        MockInteractions.pressAndReleaseKeyOn(
+            paperSlider, 39 /* right */);
+        expectEquals(6, paperSlider.value);
+        expectEquals(128, slider.value);
+
+        MockInteractions.pressAndReleaseKeyOn(
+            paperSlider, 39 /* right */);
+        expectEquals(6, paperSlider.value);
+        expectEquals(128, slider.value);
+
+        MockInteractions.pressAndReleaseKeyOn(
+            paperSlider, 37 /* left */);
+        expectEquals(5, paperSlider.value);
+        expectEquals(64, slider.value);
+      });
+
+      test('findNearestIndex_', function() {
+        var slider = document.createElement('cr-slider');
+        var testArray = [80, 20, 350, 1000, 200, 100];
+        var testFindNearestIndex = function(expectedIndex, value) {
+          expectEquals(
+              expectedIndex, slider.findNearestIndex_(testArray, value));
+        };
+        testFindNearestIndex(0, 51);
+        testFindNearestIndex(0, 80);
+        testFindNearestIndex(0, 89);
+        testFindNearestIndex(1, -100);
+        testFindNearestIndex(1, 20);
+        testFindNearestIndex(1, 49);
+        testFindNearestIndex(2, 400);
+        testFindNearestIndex(2, 350);
+        testFindNearestIndex(2, 300);
+        testFindNearestIndex(3, 200000);
+        testFindNearestIndex(3, 1000);
+        testFindNearestIndex(3, 700);
+        testFindNearestIndex(4, 220);
+        testFindNearestIndex(4, 200);
+        testFindNearestIndex(4, 151);
+        testFindNearestIndex(5, 149);
+        testFindNearestIndex(5, 100);
+        testFindNearestIndex(5, 91);
+      });
+    });
+  }
+
+  return {
+    registerTests: registerTests,
+  };
+});