1181-Css for class diagrams

Initial change for supporting custom CSS for use with classDiagrams.
updated `LABEL` regex for specificity

src/diagrams/class/classDiagram-styles.spec.js

@@ -0,0 +1,60 @@
+/* eslint-env jasmine */
+import { parser } from './parser/classDiagram';
+import classDb from './classDb';
+
+describe('class diagram, ', function() {
+  describe('when parsing data from a classDiagram it', function() {
+    beforeEach(function() {
+      parser.yy = classDb;
+      parser.yy.clear();
+    });
+
+    it('should be possible to apply a css class to a class directly', function() {
+      const str = 'classDiagram\n' + 'class Class01:::exClass';
+
+      parser.parse(str);
+
+      expect(parser.yy.getClass('Class01').cssClasses[0]).toBe('exClass');
+    });
+
+    it('should be possible to apply a css class to a class directly with struct', function () {
+      const str =
+        'classDiagram\n' +
+        'class Class1:::exClass {\n' +
+        'int : test\n' +
+        'string : foo\n' +
+        'test()\n' +
+        'foo()\n' +
+        '}';
+      parser.parse(str);
+
+      const testClass = parser.yy.getClass('Class1');
+      expect(testClass.cssClasses[0]).toBe('exClass');
+    });
+
+    it('should be possible to apply a css class to a class with relations', function() {
+      const str = 'classDiagram\n' + 'Class01 <|-- Class02\ncssClass "Class01" exClass';
+
+      parser.parse(str);
+
+      expect(parser.yy.getClass('Class01').cssClasses[0]).toBe('exClass');
+    });
+
+    it('should be possible to apply a cssClass to a class', function() {
+      const str = 'classDiagram\n' + 'class Class01\n cssClass "Class01" exClass';
+
+      parser.parse(str);
+
+      expect(parser.yy.getClass('Class01').cssClasses[0]).toBe('exClass');
+    });
+
+    it('should be possible to apply a cssClass to a comma separated list of classes', function() {
+      const str = 'classDiagram\n' + 'class Class01\n class Class02\n cssClass "Class01,Class02" exClass';
+
+      parser.parse(str);
+
+      expect(parser.yy.getClass('Class01').cssClasses[0]).toBe('exClass');
+      expect(parser.yy.getClass('Class02').cssClasses[0]).toBe('exClass');
+    });
+  });
+});