Initial work on in-browser test runner

Run `grunt test` and open up the `build/test/index.html` to run the
tests.

src/js/test/tests/operations/MorseCode.js

@@ -0,0 +1,33 @@
+/**
+ * Base58 tests.
+ *
+ * @author tlwr [toby@toby.codes
+ *
+ * @copyright Crown Copyright 2017
+ * @license Apache-2.0
+ *
+ */
+TestRegister.addTests([
+    {
+        name: "To Morse Code: 'SOS'",
+        input: "SOS",
+        expectedOutput: "... --- ...",
+        recipeConfig: [
+            {
+                op: "To Morse Code",
+                args: ["-/.", "Space", "Line feed"],
+            },
+        ],
+    },
+    {
+        name: "From Morse Code '... --- ...'",
+        input: "... --- ...",
+        expectedOutput: "SOS",
+        recipeConfig: [
+            {
+                op: "From Morse Code",
+                args: ["Space", "Line feed"],
+            },
+        ],
+    },
+]);