--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/nabble/view/web/util/codemirror/js/unittests.js	Thu Mar 21 19:15:52 2019 -0600
@@ -0,0 +1,44 @@
+/**
+ * Test Harness for CodeMirror
+ * JS-unit compatible tests here.  The two available assertions are
+ * assertEquals (strict equality) and assertEquivalent (looser equivalency).
+ *
+ * 'editor' is a global object for the CodeMirror editor shared between all
+ * tests.  After manipulating it in each test, try to restore it to
+ * approximately its original state.
+ */
+
+function testSetGet() {
+  var code = 'It was the best of times.\nIt was the worst of times.';
+  editor.setCode(code);
+  assertEquals(code, editor.getCode());
+  editor.setCode('');
+  assertEquals('', editor.getCode());
+}
+
+function testSetStylesheet() {
+  function cssStatus() {
+    // Returns a list of tuples, for each CSS link return the filename and
+    // whether it is enabled.
+    links = editor.win.document.getElementsByTagName('link');
+    css = [];
+    for (var x = 0, link; link = links[x]; x++) {
+      if (link.rel.indexOf("stylesheet") !== -1) {
+        css.push([link.href.substring(link.href.lastIndexOf('/') + 1),
+                 !link.disabled])
+      }
+    }
+    return css;
+  }
+  assertEquivalent([], cssStatus());
+  editor.setStylesheet('css/jscolors.css');
+  assertEquivalent([['jscolors.css', true]], cssStatus());
+  editor.setStylesheet(['css/csscolors.css', 'css/xmlcolors.css']);
+  assertEquivalent([['jscolors.css', false], ['csscolors.css', true], ['xmlcolors.css', true]], cssStatus());
+  editor.setStylesheet([]);
+  assertEquivalent([['jscolors.css', false], ['csscolors.css', false], ['xmlcolors.css', false]], cssStatus());
+}
+
+// Update this list of tests as new ones are added.
+var tests = ['testSetGet', 'testSetStylesheet'];
+