3 files changed, 209 insertions, 0 deletions
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);
+    });
+  });
+});