feat(icon): initial md-icon implementation (#281)

Author: dozingcat

src/components/icon/fake-svgs.ts

@@ -0,0 +1,58 @@
+import {
+  Response,
+  ResponseOptions} from 'angular2/http';
+
+/**
+ * Fake URLs and associated SVG documents used by tests.
+ */
+const FAKE_SVGS = (() => {
+  const svgs = new Map<string, string>();
+  svgs.set('cat.svg',
+      '<svg><path id="meow"></path></svg>');
+
+  svgs.set('dog.svg',
+      '<svg><path id="woof"></path></svg>');
+
+  svgs.set('farm-set-1.svg', `
+      <svg>
+        <defs>
+          <g id="pig"><path id="oink"></path></g>
+          <g id="cow"><path id="moo"></path></g>
+        </defs>
+      </svg>
+  `);
+
+  svgs.set('farm-set-2.svg', `
+      <svg>
+        <defs>
+          <g id="cow"><path id="moo moo"></path></g>
+          <g id="sheep"><path id="baa"></path></g>
+        </defs>
+      </svg>
+  `);
+
+  svgs.set('arrow-set.svg', `
+      <svg>
+        <defs>
+          <svg id="left-arrow"><path id="left"></path></svg>
+          <svg id="right-arrow"><path id="right"></path></svg>
+        </defs>
+      </svg>
+  `);
+
+  return svgs;
+})();
+
+/**
+ * Returns an HTTP response for a fake SVG URL.
+ */
+export function getFakeSvgHttpResponse(url: string) {
+  if (FAKE_SVGS.has(url)) {
+    return new Response(new ResponseOptions({
+      status: 200,
+      body: FAKE_SVGS.get(url),
+    }));
+  } else {
+    return new Response(new ResponseOptions({status: 404}));
+  }
+}