Added a toHaveClass matcher

[#153567695]

spec/html/matchers/toHaveClassSpec.js

@@ -0,0 +1,48 @@
+describe('toHaveClass', function() {
+  it('fails for a DOM element that lacks the expected class', function() {
+    var matcher = jasmineUnderTest.matchers.toHaveClass(),
+      result = matcher.compare(document.createElement('div'), 'foo');
+
+    expect(result.pass).toBe(false);
+  });
+
+  it('passes for a DOM element that has the expected class', function() {
+    var matcher = jasmineUnderTest.matchers.toHaveClass(),
+      el = document.createElement('div');
+
+    el.className = 'foo bar baz';
+
+    expect(matcher.compare(el, 'foo').pass).toBe(true);
+    expect(matcher.compare(el, 'bar').pass).toBe(true);
+    expect(matcher.compare(el, 'bar').pass).toBe(true);
+  });
+
+  it('fails for a DOM element that only has other classes', function() {
+    var matcher = jasmineUnderTest.matchers.toHaveClass(),
+      el = document.createElement('div');
+
+    el.className = 'foo bar';
+
+    expect(matcher.compare(el, 'fo').pass).toBe(false);
+  });
+
+  it('throws an exception when actual is not a DOM element', function() {
+    var matcher = jasmineUnderTest.matchers.toHaveClass();
+
+    expect(function() {
+      matcher.compare('x', 'foo');
+    }).toThrowError("'x' is not a DOM element");
+
+    expect(function() {
+      matcher.compare(undefined, 'foo');
+    }).toThrowError('undefined is not a DOM element');
+
+    expect(function() {
+      matcher.compare(document.createTextNode(''), 'foo')
+    }).toThrowError('HTMLNode is not a DOM element');
+
+    expect(function() {
+      matcher.compare({classList: ''}, 'foo');
+    }).toThrowError("Object({ classList: '' }) is not a DOM element");
+  });
+});