Different apporach to solve the issue

Author: TomMalbran

test/spec/EditorCommandHandlers-test.js

@@ -2412,10 +2412,10 @@ define(function (require, exports, module) {
         });
 
         describe("Open Line Above and Below", function () {
-            var indentUnit  = Editor.getUseTabChar() ? 1 : Editor.getSpaceUnits(),
+            var indentUnit  = SpecRunnerUtils.EDITOR_USE_TABS ? 1 : SpecRunnerUtils.EDITOR_SPACE_UNITS,
                 indentation = (function () {
                     // generate indent string once
-                    if (Editor.getUseTabChar()) {
+                    if (SpecRunnerUtils.EDITOR_USE_TABS) {
                         return "\t";
                     }
                     var spaces = [];

test/spec/SpecRunnerUtils.js

@@ -40,6 +40,8 @@ define(function (require, exports, module) {
         LanguageManager     = require("language/LanguageManager");
 
     var TEST_PREFERENCES_KEY    = "com.adobe.brackets.test.preferences",
+        EDITOR_USE_TABS         = false,
+        EDITOR_SPACE_UNITS      = 4,
         OPEN_TAG                = "{{",
         CLOSE_TAG               = "}}",
         RE_MARKER               = /\{\{(\d+)\}\}/g,
@@ -262,6 +264,8 @@ define(function (require, exports, module) {
 
         // create Editor instance
         var editor = new Editor(doc, true, $editorHolder.get(0), visibleRange);
+        Editor.setUseTabChar(EDITOR_USE_TABS);
+        Editor.setSpaceUnits(EDITOR_SPACE_UNITS);
         EditorManager._notifyActiveEditorChanged(editor);
 
         return editor;
@@ -1120,8 +1124,10 @@ define(function (require, exports, module) {
         });
     });
 
-    exports.TEST_PREFERENCES_KEY    = TEST_PREFERENCES_KEY;
-    
+    exports.TEST_PREFERENCES_KEY            = TEST_PREFERENCES_KEY;
+    exports.EDITOR_USE_TABS                 = EDITOR_USE_TABS;
+    exports.EDITOR_SPACE_UNITS              = EDITOR_SPACE_UNITS;
+
     exports.chmod                           = chmod;
     exports.remove                          = remove;
     exports.getTestRoot                     = getTestRoot;