1 files changed, 54 insertions, 1 deletions
diff --git a/spec/javascripts/ide/lib/editor_spec.js b/spec/javascripts/ide/lib/editor_spec.js
index ec56ebc0341..75e6f0f54ec 100644
--- a/spec/javascripts/ide/lib/editor_spec.js
+++ b/spec/javascripts/ide/lib/editor_spec.js
@@ -76,7 +76,8 @@ describe('Multi-file editor library', () => {
         occurrencesHighlight: false,
         renderLineHighlight: 'none',
         hideCursorInOverviewRuler: true,
-        wordWrap: 'bounded',
+        wordWrap: 'on',
+        renderSideBySide: true,
       });
     });
   });
@@ -215,4 +216,56 @@ describe('Multi-file editor library', () => {
       expect(instance.decorationsController.dispose).not.toHaveBeenCalled();
     });
   });
+
+  describe('updateDiffView', () => {
+    describe('edit mode', () => {
+      it('does not update options', () => {
+        instance.createInstance(holder);
+
+        spyOn(instance.instance, 'updateOptions');
+
+        instance.updateDiffView();
+
+        expect(instance.instance.updateOptions).not.toHaveBeenCalled();
+      });
+    });
+
+    describe('diff mode', () => {
+      beforeEach(() => {
+        instance.createDiffInstance(holder);
+
+        spyOn(instance.instance, 'updateOptions').and.callThrough();
+      });
+
+      it('sets renderSideBySide to false if el is less than 700 pixels', () => {
+        spyOnProperty(instance.instance.getDomNode(), 'offsetWidth').and.returnValue(600);
+
+        expect(instance.instance.updateOptions).not.toHaveBeenCalledWith({
+          renderSideBySide: false,
+        });
+      });
+
+      it('sets renderSideBySide to false if el is more than 700 pixels', () => {
+        spyOnProperty(instance.instance.getDomNode(), 'offsetWidth').and.returnValue(800);
+
+        expect(instance.instance.updateOptions).not.toHaveBeenCalledWith({
+          renderSideBySide: true,
+        });
+      });
+    });
+  });
+
+  describe('isDiffEditorType', () => {
+    it('returns true when diff editor', () => {
+      instance.createDiffInstance(holder);
+
+      expect(instance.isDiffEditorType).toBe(true);
+    });
+
+    it('returns false when not diff editor', () => {
+      instance.createInstance(holder);
+
+      expect(instance.isDiffEditorType).toBe(false);
+    });
+  });
 });