Add specs for legend - #515

Gruntfile.coffee

@@ -83,7 +83,9 @@ module.exports = (grunt) ->
           c3:
             src: 'c3.js'
             options:
-              specs: 'spec/*.js'
+              specs: 'spec/*-spec.js'
+              helpers: 'spec/*-helper.js'
+              vendor: 'http://d3js.org/d3.v3.min.js'
 
         uglify:
           c3:

spec/c3-helper.js

+function initDom() {
+    'use strict';
+
+    var div = document.createElement('div');
+    div.id = 'chart';
+    div.style.width = '640px';
+    div.style.height = '480px';
+    document.body.appendChild(div);
+    document.body.style.margin = '0px';
+}
+typeof initDom !== 'undefined';

spec/c3-spec.js

-
-var describe = window.describe;
-var expect = window.expect;
-var it = window.it;
-
-var c3 = window.c3;
+var describe = window.describe,
+    expect = window.expect,
+    it = window.it;
 
 describe('c3', function () {
     'use strict';
 
-    it('exists', function () {
+    var c3 = window.c3;
 
-        expect(c3).not.toBe(null);
+    it('exists', function () {
+        expect(c3).not.toBeNull();
         expect(typeof c3).toBe('object');
-
     });
-
-    // ...write other tests here
-
 });
+

spec/core-spec.js

+var describe = window.describe,
+    expect = window.expect,
+    it = window.it,
+    beforeEach = window.beforeEach;
+
+describe('c3 chart', function () {
+    'use strict';
+
+    var chart, d3;
+
+    beforeEach(function () {
+        window.initDom();
+
+        chart = window.c3.generate({
+            data: {
+                columns: [
+                    ['data1', 30, 200, 100, 400, 150, 250],
+                    ['data2', 50, 20, 10, 40, 15, 25],
+                    ['data3', 150, 120, 110, 140, 115, 125]
+                ]
+            }
+        });
+
+        d3 = chart.internal.d3;
+    });
+
+    it('should be created', function () {
+        var svg = d3.select('#chart svg');
+        expect(svg).not.toBeNull();
+    });
+
+    it('should have same width', function () {
+        var svg = d3.select('#chart svg');
+        expect(+svg.attr('width')).toBe(640);
+    });
+
+    it('should have same height', function () {
+        var svg = d3.select('#chart svg');
+        expect(+svg.attr('height')).toBe(480);
+    });
+
+});

spec/legend-spec.js

+var describe = window.describe,
+    expect = window.expect,
+    it = window.it,
+    beforeEach = window.beforeEach;
+
+describe('c3 chart legend', function () {
+    'use strict';
+
+    var chart, d3;
+
+    beforeEach(function () {
+        window.initDom();
+
+        chart = window.c3.generate({
+            data: {
+                columns: [
+                    ['data1', 30, 200, 100, 400, 150, 250],
+                    ['data2', 50, 20, 10, 40, 15, 25],
+                    ['data3', 150, 120, 110, 140, 115, 125]
+                ]
+            }
+        });
+
+        d3 = chart.internal.d3;
+    });
+
+    it('should be located on the center of chart', function () {
+        var box = chart.internal.legend.node().getBoundingClientRect();
+        expect(box.left + box.right).toBe(640);
+    });
+
+});