Moved toHaveClass matcher into core so that it can be used in Karma

- Fixes #1503

spec/core/matchers/toHaveClassSpec.js

@@ -0,0 +1,69 @@
+describe('toHaveClass', function() {
+  beforeEach(function(done) {
+    this.createElementWithClassName = function(className) {
+      var el = this.doc.createElement('div');
+      el.className = className;
+      return el;
+    }
+
+    if (typeof document !== 'undefined') {
+      this.doc = document;
+      done();
+    } else {
+      var jsdom = require('jsdom');
+      var self = this;
+      jsdom.env('', function(err, win) {
+        if (err) {
+          done.fail(err);
+        } else {
+          self.doc = win.document;
+          done();
+        }
+      });
+    }
+  });
+
+  it('fails for a DOM element that lacks the expected class', function() {
+    var matcher = jasmineUnderTest.matchers.toHaveClass(),
+      result = matcher.compare(this.createElementWithClassName(''), 'foo');
+
+    expect(result.pass).toBe(false);
+  });
+
+  it('passes for a DOM element that has the expected class', function() {
+    var matcher = jasmineUnderTest.matchers.toHaveClass(),
+      el = this.createElementWithClassName('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 = this.createElementWithClassName('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');
+
+    var textNode = this.doc.createTextNode('');
+    expect(function() {
+      matcher.compare(textNode, 'foo')
+    }).toThrowError('HTMLNode is not a DOM element');
+
+    expect(function() {
+      matcher.compare({classList: ''}, 'foo');
+    }).toThrowError("Object({ classList: '' }) is not a DOM element");
+  });
+});