Initial tests for timeline ItemSet. (#2750)

Somewhat more complicated setup, associated with the need for a real window.

package.json

@@ -56,6 +56,7 @@
     "gulp-rename": "^1.2.2",
     "gulp-util": "^3.0.8",
     "jsdom": "9.9.1",
+    "jsdom-global": "^2.1.1",
     "mocha": "^3.2.0",
     "mocha-jsdom": "^1.1.0",
     "rimraf": "^2.5.4",

test/TestSupport.js

@@ -22,7 +22,12 @@ module.exports = {
           clientWidth: 1000
         }
       },
-      domProps: this.props,
+      domProps: {
+        centerContainer: {
+          width: 900,
+          height: 600
+        }
+      },
       emitter: {
         on: function () {},
         off: function () {},

test/TimelineItemSet.test.js

@@ -0,0 +1,108 @@
+var assert = require('assert');
+
+describe('Timeline ItemSet', function () {
+  before(function () {
+    delete require.cache[require.resolve('../dist/vis')]
+    this.jsdom = require('jsdom-global')();
+    this.vis = require('../dist/vis');
+    var TestSupport = require('./TestSupport');
+    var rangeBody = TestSupport.buildSimpleTimelineRangeBody();
+    this.testrange = new this.vis.timeline.Range(rangeBody);
+    this.testrange.setRange(new Date(2017, 1, 26, 13, 26, 3, 320), new Date(2017, 1, 26, 13, 26, 4, 320), false, false, null);
+    this.testitems =  new this.vis.DataSet({
+      type: {
+        start: 'Date',
+        end: 'Date'
+      }
+    });
+    // add single items with different date types
+    this.testitems.add({id: 1, content: 'Item 1', start: new Date(2017, 1, 26, 13, 26, 3, 600), type: 'point'});
+    this.testitems.add({id: 2, content: 'Item 2', start: new Date(2017, 1, 26, 13, 26, 5, 600), type: 'point'});
+  })
+
+  after(function () {
+    this.jsdom();
+  })
+
+  var getBasicBody = function() {
+    var body = {
+      dom: {
+        container: document.createElement('div'),
+        leftContainer: document.createElement('div'),
+        centerContainer: document.createElement('div'),
+        top: document.createElement('div'),
+        left: document.createElement('div'),
+        center: document.createElement('div'),
+        backgroundVertical: document.createElement('div')
+      },
+      domProps: {
+        root: {},
+        background: {},
+        centerContainer: {},
+        leftContainer: {},
+        rightContainer: {},
+        center: {},
+        left: {},
+        right: {},
+        top: {},
+        bottom: {},
+        border: {},
+        scrollTop: 0,
+        scrollTopMin: 0
+      },
+      emitter: {
+        on: function() {return {};},
+        emit: function() {}
+      },
+      util: {
+      }
+    }
+    return body;
+  };
+
+  it('should initialise with minimal data', function () {
+    var body = getBasicBody();
+    var itemset = new this.vis.timeline.components.ItemSet(body, {});
+    assert(itemset);
+  });
+
+  it('should redraw() and have the right classNames', function () {
+    var body = getBasicBody();
+    body.range = this.testrange;
+    var itemset = new this.vis.timeline.components.ItemSet(body, {});
+    itemset.redraw();
+    assert.equal(itemset.dom.frame.className, 'vis-itemset');
+    assert.equal(itemset.dom.background.className, 'vis-background');
+    assert.equal(itemset.dom.foreground.className, 'vis-foreground');
+    assert.equal(itemset.dom.axis.className, 'vis-axis');
+    assert.equal(itemset.dom.labelSet.className, 'vis-labelset');
+  });
+
+  it('should start with no items', function () {
+    var body = getBasicBody();
+    var itemset = new this.vis.timeline.components.ItemSet(body, {});
+    assert.equal(itemset.getItems(), null);
+  });
+
+  it('should store items correctly', function() {
+    var body = getBasicBody();
+    body.range = this.testrange;
+    var DateUtil = this.vis.timeline.DateUtil;
+    body.util.toScreen = function(time) {
+      return DateUtil.toScreen({
+        body: {
+          hiddenDates: []
+        },
+        range: {
+          conversion: function() {
+            return {offset: 0, scale: 100};
+          }
+        }
+      }, time, 900)
+    };
+    var itemset = new this.vis.timeline.components.ItemSet(body, {});
+    itemset.setItems(this.testitems);
+    assert.equal(itemset.getItems().length, 2);
+    assert.deepEqual(itemset.getItems(), this.testitems);
+  });
+});