added specs

8 files changed, 714 insertions, 22 deletions

diff --git a/app/assets/javascripts/repo/lib/common/model.js b/app/assets/javascripts/repo/lib/common/model.js
index fd6f41f87b1..23c4811e6c0 100644
--- a/app/assets/javascripts/repo/lib/common/model.js
+++ b/app/assets/javascripts/repo/lib/common/model.js
@@ -28,31 +28,10 @@ export default class Model {
     return this.model.uri.toString();
   }
 
-  get originalUrl() {
-    return this.originalModel.uri.toString();
-  }
-
   get path() {
     return this.file.path;
   }
 
-  get diffModel() {
-    return Model.getDiffModel(this.model);
-  }
-
-  get originalDiffModel() {
-    return Model.getDiffModel(this.originalModel);
-  }
-
-  static getDiffModel(model) {
-    return {
-      url: model.uri.toString(),
-      versionId: model.getVersionId(),
-      lines: model.getLinesContent(),
-      EOL: '\n',
-    };
-  }
-
   getModel() {
     return this.model;
   }
@@ -63,7 +42,7 @@ export default class Model {
 
   onChange(cb) {
     this.events.set(
-      this.file.path,
+      this.path,
       this.disposable.add(
         this.model.onDidChangeContent(e => cb(this.model, e)),
       ),
diff --git a/spec/javascripts/repo/lib/common/disposable_spec.js b/spec/javascripts/repo/lib/common/disposable_spec.js
new file mode 100644
index 00000000000..62c3913bf4d
--- /dev/null
+++ b/spec/javascripts/repo/lib/common/disposable_spec.js
@@ -0,0 +1,44 @@
+import Disposable from '~/repo/lib/common/disposable';
+
+describe('Multi-file editor library disposable class', () => {
+  let instance;
+  let disposableClass;
+
+  beforeEach(() => {
+    instance = new Disposable();
+
+    disposableClass = {
+      dispose: jasmine.createSpy('dispose'),
+    };
+  });
+
+  afterEach(() => {
+    instance.dispose();
+  });
+
+  describe('add', () => {
+    it('adds disposable classes', () => {
+      instance.add(disposableClass);
+
+      expect(instance.disposers.size).toBe(1);
+    });
+  });
+
+  describe('dispose', () => {
+    beforeEach(() => {
+      instance.add(disposableClass);
+    });
+
+    it('calls dispose on all cached disposers', () => {
+      instance.dispose();
+
+      expect(disposableClass.dispose).toHaveBeenCalled();
+    });
+
+    it('clears cached disposers', () => {
+      instance.dispose();
+
+      expect(instance.disposers.size).toBe(0);
+    });
+  });
+});
diff --git a/spec/javascripts/repo/lib/common/model_manager_spec.js b/spec/javascripts/repo/lib/common/model_manager_spec.js
new file mode 100644
index 00000000000..8c134f178c0
--- /dev/null
+++ b/spec/javascripts/repo/lib/common/model_manager_spec.js
@@ -0,0 +1,81 @@
+/* global monaco */
+import monacoLoader from '~/repo/monaco_loader';
+import ModelManager from '~/repo/lib/common/model_manager';
+import { file } from '../../helpers';
+
+describe('Multi-file editor library model manager', () => {
+  let instance;
+
+  beforeEach((done) => {
+    monacoLoader(['vs/editor/editor.main'], () => {
+      instance = new ModelManager(monaco);
+
+      done();
+    });
+  });
+
+  afterEach(() => {
+    instance.dispose();
+  });
+
+  describe('addModel', () => {
+    it('caches model', () => {
+      instance.addModel(file());
+
+      expect(instance.models.size).toBe(1);
+    });
+
+    it('caches model by file path', () => {
+      instance.addModel(file('path-name'));
+
+      expect(instance.models.keys().next().value).toBe('path-name');
+    });
+
+    it('adds model into disposable', () => {
+      spyOn(instance.disposable, 'add').and.callThrough();
+
+      instance.addModel(file());
+
+      expect(instance.disposable.add).toHaveBeenCalled();
+    });
+
+    it('returns cached model', () => {
+      spyOn(instance.models, 'get').and.callThrough();
+
+      instance.addModel(file());
+      instance.addModel(file());
+
+      expect(instance.models.get).toHaveBeenCalled();
+    });
+  });
+
+  describe('hasCachedModel', () => {
+    it('returns false when no models exist', () => {
+      expect(instance.hasCachedModel('path')).toBeFalsy();
+    });
+
+    it('returns true when model exists', () => {
+      instance.addModel(file('path-name'));
+
+      expect(instance.hasCachedModel('path-name')).toBeTruthy();
+    });
+  });
+
+  describe('dispose', () => {
+    it('clears cached models', () => {
+      instance.addModel(file());
+
+      instance.dispose();
+
+      expect(instance.models.size).toBe(0);
+    });
+
+    it('calls disposable dispose', () => {
+      spyOn(instance.disposable, 'dispose').and.callThrough();
+
+      instance.dispose();
+
+      expect(instance.disposable.dispose).toHaveBeenCalled();
+    });
+  });
+});
diff --git a/spec/javascripts/repo/lib/common/model_spec.js b/spec/javascripts/repo/lib/common/model_spec.js
new file mode 100644
index 00000000000..d41ade237ca
--- /dev/null
+++ b/spec/javascripts/repo/lib/common/model_spec.js
@@ -0,0 +1,84 @@
+/* global monaco */
+import monacoLoader from '~/repo/monaco_loader';
+import Model from '~/repo/lib/common/model';
+import { file } from '../../helpers';
+
+describe('Multi-file editor library model', () => {
+  let model;
+
+  beforeEach((done) => {
+    monacoLoader(['vs/editor/editor.main'], () => {
+      model = new Model(monaco, file('path'));
+
+      done();
+    });
+  });
+
+  afterEach(() => {
+    model.dispose();
+  });
+
+  it('creates original model & new model', () => {
+    expect(model.originalModel).not.toBeNull();
+    expect(model.model).not.toBeNull();
+  });
+
+  describe('path', () => {
+    it('returns file path', () => {
+      expect(model.path).toBe('path');
+    });
+  });
+
+  describe('getModel', () => {
+    it('returns model', () => {
+      expect(model.getModel()).toBe(model.model);
+    });
+  });
+
+  describe('getOriginalModel', () => {
+    it('returns original model', () => {
+      expect(model.getOriginalModel()).toBe(model.originalModel);
+    });
+  });
+
+  describe('onChange', () => {
+    it('caches event by path', () => {
+      model.onChange(() => {});
+
+      expect(model.events.size).toBe(1);
+      expect(model.events.keys().next().value).toBe('path');
+    });
+
+    it('calls callback on change', (done) => {
+      const spy = jasmine.createSpy();
+      model.onChange(spy);
+
+      model.getModel().setValue('123');
+
+      setTimeout(() => {
+        expect(spy).toHaveBeenCalledWith(model.getModel(), jasmine.anything());
+        done();
+      });
+    });
+  });
+
+  describe('dispose', () => {
+    it('calls disposable dispose', () => {
+      spyOn(model.disposable, 'dispose').and.callThrough();
+
+      model.dispose();
+
+      expect(model.disposable.dispose).toHaveBeenCalled();
+    });
+
+    it('clears events', () => {
+      model.onChange(() => {});
+
+      expect(model.events.size).toBe(1);
+
+      model.dispose();
+
+      expect(model.events.size).toBe(0);
+    });
+  });
+});
diff --git a/spec/javascripts/repo/lib/decorations/controller_spec.js b/spec/javascripts/repo/lib/decorations/controller_spec.js
new file mode 100644
index 00000000000..2e32e8fa0bd
--- /dev/null
+++ b/spec/javascripts/repo/lib/decorations/controller_spec.js
@@ -0,0 +1,120 @@
+/* global monaco */
+import monacoLoader from '~/repo/monaco_loader';
+import editor from '~/repo/lib/editor';
+import DecorationsController from '~/repo/lib/decorations/controller';
+import Model from '~/repo/lib/common/model';
+import { file } from '../../helpers';
+
+describe('Multi-file editor library decorations controller', () => {
+  let editorInstance;
+  let controller;
+  let model;
+
+  beforeEach((done) => {
+    monacoLoader(['vs/editor/editor.main'], () => {
+      editorInstance = editor.create(monaco);
+      editorInstance.createInstance(document.createElement('div'));
+
+      controller = new DecorationsController(editorInstance);
+      model = new Model(monaco, file('path'));
+
+      done();
+    });
+  });
+
+  afterEach(() => {
+    model.dispose();
+    editorInstance.dispose();
+    controller.dispose();
+  });
+
+  describe('getAllDecorationsForModel', () => {
+    it('returns empty array when no decorations exist for model', () => {
+      const decorations = controller.getAllDecorationsForModel(model);
+
+      expect(decorations).toEqual([]);
+    });
+
+    it('returns decorations by model URL', () => {
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue' }]);
+
+      const decorations = controller.getAllDecorationsForModel(model);
+
+      expect(decorations[0]).toEqual({ decoration: 'decorationValue' });
+    });
+  });
+
+  describe('addDecorations', () => {
+    it('caches decorations in a new map', () => {
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue' }]);
+
+      expect(controller.decorations.size).toBe(1);
+    });
+
+    it('does not create new cache model', () => {
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue' }]);
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue2' }]);
+
+      expect(controller.decorations.size).toBe(1);
+    });
+
+    it('caches decorations by model URL', () => {
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue' }]);
+
+      expect(controller.decorations.size).toBe(1);
+      expect(controller.decorations.keys().next().value).toBe('path');
+    });
+
+    it('calls decorate method', () => {
+      spyOn(controller, 'decorate');
+
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue' }]);
+
+      expect(controller.decorate).toHaveBeenCalled();
+    });
+  });
+
+  describe('decorate', () => {
+    it('sets decorations on editor instance', () => {
+      spyOn(controller.editor.instance, 'deltaDecorations');
+
+      controller.decorate(model);
+
+      expect(controller.editor.instance.deltaDecorations).toHaveBeenCalledWith([], []);
+    });
+
+    it('caches decorations', () => {
+      spyOn(controller.editor.instance, 'deltaDecorations').and.returnValue([]);
+
+      controller.decorate(model);
+
+      expect(controller.editorDecorations.size).toBe(1);
+    });
+
+    it('caches decorations by model URL', () => {
+      spyOn(controller.editor.instance, 'deltaDecorations').and.returnValue([]);
+
+      controller.decorate(model);
+
+      expect(controller.editorDecorations.keys().next().value).toBe('path');
+    });
+  });
+
+  describe('dispose', () => {
+    it('clears cached decorations', () => {
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue' }]);
+
+      controller.dispose();
+
+      expect(controller.decorations.size).toBe(0);
+    });
+
+    it('clears cached editorDecorations', () => {
+      controller.addDecorations(model, 'key', [{ decoration: 'decorationValue' }]);
+
+      controller.dispose();
+
+      expect(controller.editorDecorations.size).toBe(0);
+    });
+  });
+});
diff --git a/spec/javascripts/repo/lib/diff/controller_spec.js b/spec/javascripts/repo/lib/diff/controller_spec.js
new file mode 100644
index 00000000000..ed62e28d3a3
--- /dev/null
+++ b/spec/javascripts/repo/lib/diff/controller_spec.js
@@ -0,0 +1,176 @@
+/* global monaco */
+import monacoLoader from '~/repo/monaco_loader';
+import editor from '~/repo/lib/editor';
+import ModelManager from '~/repo/lib/common/model_manager';
+import DecorationsController from '~/repo/lib/decorations/controller';
+import DirtyDiffController, { getDiffChangeType, getDecorator } from '~/repo/lib/diff/controller';
+import { computeDiff } from '~/repo/lib/diff/diff';
+import { file } from '../../helpers';
+
+describe('Multi-file editor library dirty diff controller', () => {
+  let editorInstance;
+  let controller;
+  let modelManager;
+  let decorationsController;
+  let model;
+
+  beforeEach((done) => {
+    monacoLoader(['vs/editor/editor.main'], () => {
+      editorInstance = editor.create(monaco);
+      editorInstance.createInstance(document.createElement('div'));
+
+      modelManager = new ModelManager(monaco);
+      decorationsController = new DecorationsController(editorInstance);
+
+      model = modelManager.addModel(file());
+
+      controller = new DirtyDiffController(modelManager, decorationsController);
+
+      done();
+    });
+  });
+
+  afterEach(() => {
+    controller.dispose();
+    model.dispose();
+    decorationsController.dispose();
+    editorInstance.dispose();
+  });
+
+  describe('getDiffChangeType', () => {
+    ['added', 'removed', 'modified'].forEach((type) => {
+      it(`returns ${type}`, () => {
+        const change = {
+          [type]: true,
+        };
+
+        expect(getDiffChangeType(change)).toBe(type);
+      });
+    });
+  });
+
+  describe('getDecorator', () => {
+    ['added', 'removed', 'modified'].forEach((type) => {
+      it(`returns with linesDecorationsClassName for ${type}`, () => {
+        const change = {
+          [type]: true,
+        };
+
+        expect(
+          getDecorator(change).options.linesDecorationsClassName,
+        ).toBe(`dirty-diff dirty-diff-${type}`);
+      });
+
+      it('returns with line numbers', () => {
+        const change = {
+          lineNumber: 1,
+          endLineNumber: 2,
+          [type]: true,
+        };
+
+        const range = getDecorator(change).range;
+
+        expect(range.startLineNumber).toBe(1);
+        expect(range.endLineNumber).toBe(2);
+        expect(range.startColumn).toBe(1);
+        expect(range.endColumn).toBe(1);
+      });
+    });
+  });
+
+  describe('attachModel', () => {
+    it('adds change event callback', () => {
+      spyOn(model, 'onChange');
+
+      controller.attachModel(model);
+
+      expect(model.onChange).toHaveBeenCalled();
+    });
+
+    it('calls throttledComputeDiff on change', () => {
+      spyOn(controller, 'throttledComputeDiff');
+
+      controller.attachModel(model);
+
+      model.getModel().setValue('123');
+
+      expect(controller.throttledComputeDiff).toHaveBeenCalled();
+    });
+  });
+
+  describe('computeDiff', () => {
+    it('posts to worker', () => {
+      spyOn(controller.dirtyDiffWorker, 'postMessage');
+
+      controller.computeDiff(model);
+
+      expect(controller.dirtyDiffWorker.postMessage).toHaveBeenCalledWith({
+        path: model.path,
+        originalContent: '',
+        newContent: '',
+      });
+    });
+  });
+
+  describe('reDecorate', () => {
+    it('calls decorations controller decorate', () => {
+      spyOn(controller.decorationsController, 'decorate');
+
+      controller.reDecorate(model);
+
+      expect(controller.decorationsController.decorate).toHaveBeenCalledWith(model);
+    });
+  });
+
+  describe('decorate', () => {
+    it('adds decorations into decorations controller', () => {
+      spyOn(controller.decorationsController, 'addDecorations');
+
+      controller.decorate({ data: { changes: [], path: 'path' } });
+
+      expect(controller.decorationsController.addDecorations).toHaveBeenCalledWith('path', 'dirtyDiff', jasmine.anything());
+    });
+
+    it('adds decorations into editor', () => {
+      const spy = spyOn(controller.decorationsController.editor.instance, 'deltaDecorations');
+
+      controller.decorate({ data: { changes: computeDiff('123', '1234'), path: 'path' } });
+
+      expect(spy).toHaveBeenCalledWith([], [{
+        range: new monaco.Range(
+          1, 1, 1, 1,
+        ),
+        options: {
+          isWholeLine: true,
+          linesDecorationsClassName: 'dirty-diff dirty-diff-modified',
+        },
+      }]);
+    });
+  });
+
+  describe('dispose', () => {
+    it('calls disposable dispose', () => {
+      spyOn(controller.disposable, 'dispose').and.callThrough();
+
+      controller.dispose();
+
+      expect(controller.disposable.dispose).toHaveBeenCalled();
+    });
+
+    it('terminates worker', () => {
+      spyOn(controller.dirtyDiffWorker, 'terminate').and.callThrough();
+
+      controller.dispose();
+
+      expect(controller.dirtyDiffWorker.terminate).toHaveBeenCalled();
+    });
+
+    it('removes worker event listener', () => {
+      spyOn(controller.dirtyDiffWorker, 'removeEventListener').and.callThrough();
+
+      controller.dispose();
+
+      expect(controller.dirtyDiffWorker.removeEventListener).toHaveBeenCalledWith('message', jasmine.anything());
+    });
+  });
+});
diff --git a/spec/javascripts/repo/lib/diff/diff_spec.js b/spec/javascripts/repo/lib/diff/diff_spec.js
new file mode 100644
index 00000000000..8a18ee89c47
--- /dev/null
+++ b/spec/javascripts/repo/lib/diff/diff_spec.js
@@ -0,0 +1,80 @@
+import { computeDiff } from '~/repo/lib/diff/diff';
+
+describe('Multi-file editor library diff calculator', () => {
+  describe('computeDiff', () => {
+    it('returns empty array if no changes', () => {
+      const diff = computeDiff('123', '123');
+
+      expect(diff).toEqual([]);
+    });
+
+    describe('modified', () => {
+      it('', () => {
+        const diff = computeDiff('123', '1234');
+
+        expect(diff[0].added).toBeTruthy();
+        expect(diff[0].modified).toBeTruthy();
+        expect(diff[0].removed).toBeUndefined();
+      });
+
+      it('', () => {
+        const diff = computeDiff('123\n123\n123', '123\n1234\n123');
+
+        expect(diff[0].added).toBeTruthy();
+        expect(diff[0].modified).toBeTruthy();
+        expect(diff[0].removed).toBeUndefined();
+        expect(diff[0].lineNumber).toBe(2);
+      });
+    });
+
+    describe('added', () => {
+      it('', () => {
+        const diff = computeDiff('123', '123\n123');
+
+        expect(diff[0].added).toBeTruthy();
+        expect(diff[0].modified).toBeUndefined();
+        expect(diff[0].removed).toBeUndefined();
+      });
+
+      it('', () => {
+        const diff = computeDiff('123\n123\n123', '123\n123\n1234\n123');
+
+        expect(diff[0].added).toBeTruthy();
+        expect(diff[0].modified).toBeUndefined();
+        expect(diff[0].removed).toBeUndefined();
+        expect(diff[0].lineNumber).toBe(3);
+      });
+    });
+
+    describe('removed', () => {
+      it('', () => {
+        const diff = computeDiff('123', '');
+
+        expect(diff[0].added).toBeUndefined();
+        expect(diff[0].modified).toBeUndefined();
+        expect(diff[0].removed).toBeTruthy();
+      });
+
+      it('', () => {
+        const diff = computeDiff('123\n123\n123', '123\n123');
+
+        expect(diff[0].added).toBeUndefined();
+        expect(diff[0].modified).toBeTruthy();
+        expect(diff[0].removed).toBeTruthy();
+        expect(diff[0].lineNumber).toBe(2);
+      });
+    });
+
+    it('includes line number of change', () => {
+      const diff = computeDiff('123', '');
+
+      expect(diff[0].lineNumber).toBe(1);
+    });
+
+    it('includes end line number of change', () => {
+      const diff = computeDiff('123', '');
+
+      expect(diff[0].endLineNumber).toBe(1);
+    });
+  });
+});
diff --git a/spec/javascripts/repo/lib/editor_spec.js b/spec/javascripts/repo/lib/editor_spec.js
new file mode 100644
index 00000000000..cd32832a232
--- /dev/null
+++ b/spec/javascripts/repo/lib/editor_spec.js
@@ -0,0 +1,128 @@
+/* global monaco */
+import monacoLoader from '~/repo/monaco_loader';
+import editor from '~/repo/lib/editor';
+import { file } from '../helpers';
+
+describe('Multi-file editor library', () => {
+  let instance;
+
+  beforeEach((done) => {
+    monacoLoader(['vs/editor/editor.main'], () => {
+      instance = editor.create(monaco);
+
+      done();
+    });
+  });
+
+  afterEach(() => {
+    instance.dispose();
+  });
+
+  it('creates instance of editor', () => {
+    expect(editor.editorInstance).not.toBeNull();
+  });
+
+  describe('createInstance', () => {
+    let el;
+
+    beforeEach(() => {
+      el = document.createElement('div');
+    });
+
+    it('creates editor instance', () => {
+      spyOn(instance.monaco.editor, 'create').and.callThrough();
+
+      instance.createInstance(el);
+
+      expect(instance.monaco.editor.create).toHaveBeenCalled();
+    });
+
+    it('creates dirty diff controller', () => {
+      instance.createInstance(el);
+
+      expect(instance.dirtyDiffController).not.toBeNull();
+    });
+  });
+
+  describe('createModel', () => {
+    it('calls model manager addModel', () => {
+      spyOn(instance.modelManager, 'addModel');
+
+      instance.createModel('FILE');
+
+      expect(instance.modelManager.addModel).toHaveBeenCalledWith('FILE');
+    });
+  });
+
+  describe('attachModel', () => {
+    let model;
+
+    beforeEach(() => {
+      instance.createInstance(document.createElement('div'));
+
+      model = instance.createModel(file());
+    });
+
+    it('sets the current model on the instance', () => {
+      instance.attachModel(model);
+
+      expect(instance.currentModel).toBe(model);
+    });
+
+    it('attaches the model to the current instance', () => {
+      spyOn(instance.instance, 'setModel');
+
+      instance.attachModel(model);
+
+      expect(instance.instance.setModel).toHaveBeenCalledWith(model.getModel());
+    });
+
+    it('attaches the model to the dirty diff controller', () => {
+      spyOn(instance.dirtyDiffController, 'attachModel');
+
+      instance.attachModel(model);
+
+      expect(instance.dirtyDiffController.attachModel).toHaveBeenCalledWith(model);
+    });
+
+    it('re-decorates with the dirty diff controller', () => {
+      spyOn(instance.dirtyDiffController, 'reDecorate');
+
+      instance.attachModel(model);
+
+      expect(instance.dirtyDiffController.reDecorate).toHaveBeenCalledWith(model);
+    });
+  });
+
+  describe('clearEditor', () => {
+    it('resets the editor model', () => {
+      instance.createInstance(document.createElement('div'));
+
+      spyOn(instance.instance, 'setModel');
+
+      instance.clearEditor();
+
+      expect(instance.instance.setModel).toHaveBeenCalledWith(null);
+    });
+  });
+
+  describe('dispose', () => {
+    it('calls disposble dispose method', () => {
+      spyOn(instance.disposable, 'dispose').and.callThrough();
+
+      instance.dispose();
+
+      expect(instance.disposable.dispose).toHaveBeenCalled();
+    });
+
+    it('resets instance', () => {
+      instance.createInstance(document.createElement('div'));
+
+      expect(instance.instance).not.toBeNull();
+
+      instance.dispose();
+
+      expect(instance.instance).toBeNull();
+    });
+  });
+});