gitlab-org--gitlab-foss/spec/frontend/editor/source_editor_spec.js

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/* eslint-disable max-classes-per-file */
import { editor as monacoEditor, languages as monacoLanguages } from 'monaco-editor';
import waitForPromises from 'helpers/wait_for_promises';
import {
SOURCE_EDITOR_INSTANCE_ERROR_NO_EL,
URI_PREFIX,
EDITOR_READY_EVENT,
} from '~/editor/constants';
import { SourceEditorExtension } from '~/editor/extensions/source_editor_extension_base';
import SourceEditor from '~/editor/source_editor';
import { DEFAULT_THEME, themes } from '~/ide/lib/themes';
import { joinPaths } from '~/lib/utils/url_utility';
describe('Base editor', () => {
let editorEl;
let editor;
let defaultArguments;
const blobOriginalContent = 'Foo Foo';
const blobContent = 'Foo Bar';
const blobPath = 'test.md';
const blobGlobalId = 'snippet_777';
const fakeModel = { foo: 'bar', dispose: jest.fn() };
beforeEach(() => {
setFixtures('<div id="editor" data-editor-loading></div>');
editorEl = document.getElementById('editor');
defaultArguments = { el: editorEl, blobPath, blobContent, blobGlobalId };
editor = new SourceEditor();
});
afterEach(() => {
editor.dispose();
editorEl.remove();
monacoEditor.getModels().forEach((model) => {
model.dispose();
});
});
const uriFilePath = joinPaths('/', URI_PREFIX, blobGlobalId, blobPath);
it('initializes Editor with basic properties', () => {
expect(editor).toBeDefined();
expect(editor.instances).toEqual([]);
});
it('removes `editor-loading` data attribute from the target DOM element', () => {
editor.createInstance({ el: editorEl });
expect(editorEl.dataset.editorLoading).toBeUndefined();
});
describe('instance of the Source Editor', () => {
let modelSpy;
let instanceSpy;
const setModel = jest.fn();
const dispose = jest.fn();
const mockModelReturn = (res = fakeModel) => {
modelSpy = jest.spyOn(monacoEditor, 'createModel').mockImplementation(() => res);
};
const mockDecorateInstance = (decorations = {}) => {
jest.spyOn(SourceEditor, 'convertMonacoToELInstance').mockImplementation((inst) => {
return Object.assign(inst, decorations);
});
};
beforeEach(() => {
modelSpy = jest.spyOn(monacoEditor, 'createModel');
});
describe('instance of the Code Editor', () => {
beforeEach(() => {
instanceSpy = jest.spyOn(monacoEditor, 'create');
});
it('throws an error if no dom element is supplied', () => {
mockDecorateInstance();
expect(() => {
editor.createInstance();
}).toThrow(SOURCE_EDITOR_INSTANCE_ERROR_NO_EL);
expect(modelSpy).not.toHaveBeenCalled();
expect(instanceSpy).not.toHaveBeenCalled();
expect(SourceEditor.convertMonacoToELInstance).not.toHaveBeenCalled();
});
it('creates model to be supplied to Monaco editor', () => {
mockModelReturn();
mockDecorateInstance({
setModel,
});
editor.createInstance(defaultArguments);
expect(modelSpy).toHaveBeenCalledWith(
blobContent,
undefined,
expect.objectContaining({
path: uriFilePath,
}),
);
expect(setModel).toHaveBeenCalledWith(fakeModel);
});
it('does not create a model automatically if model is passed as `null`', () => {
mockDecorateInstance({
setModel,
});
editor.createInstance({ ...defaultArguments, model: null });
expect(modelSpy).not.toHaveBeenCalled();
expect(setModel).not.toHaveBeenCalled();
});
it('initializes the instance on a supplied DOM node', () => {
editor.createInstance({ el: editorEl });
expect(editor.editorEl).not.toBe(null);
expect(instanceSpy).toHaveBeenCalledWith(editorEl, expect.anything());
});
it('with blobGlobalId, creates model with the id in uri', () => {
editor.createInstance(defaultArguments);
expect(modelSpy).toHaveBeenCalledWith(
blobContent,
undefined,
expect.objectContaining({
path: uriFilePath,
}),
);
});
it('initializes instance with passed properties', () => {
const instanceOptions = {
foo: 'bar',
};
editor.createInstance({
el: editorEl,
...instanceOptions,
});
expect(instanceSpy).toHaveBeenCalledWith(
editorEl,
expect.objectContaining(instanceOptions),
);
});
it('disposes instance when the global editor is disposed', () => {
mockDecorateInstance({
dispose,
});
editor.createInstance(defaultArguments);
expect(dispose).not.toHaveBeenCalled();
editor.dispose();
expect(dispose).toHaveBeenCalled();
});
it("removes the disposed instance from the global editor's storage and disposes the associated model", () => {
mockModelReturn();
mockDecorateInstance({
setModel,
});
const instance = editor.createInstance(defaultArguments);
expect(editor.instances).toHaveLength(1);
expect(fakeModel.dispose).not.toHaveBeenCalled();
instance.dispose();
expect(editor.instances).toHaveLength(0);
expect(fakeModel.dispose).toHaveBeenCalled();
});
});
describe('instance of the Diff Editor', () => {
beforeEach(() => {
instanceSpy = jest.spyOn(monacoEditor, 'createDiffEditor');
});
it('Diff Editor goes through the normal path of Code Editor just with the flag ON', () => {
const spy = jest.spyOn(editor, 'createInstance').mockImplementation(() => {});
editor.createDiffInstance();
expect(spy).toHaveBeenCalledWith(
expect.objectContaining({
isDiff: true,
}),
);
});
it('initializes the instance on a supplied DOM node', () => {
const wrongInstanceSpy = jest.spyOn(monacoEditor, 'create').mockImplementation(() => ({}));
editor.createDiffInstance({ ...defaultArguments, blobOriginalContent });
expect(editor.editorEl).not.toBe(null);
expect(wrongInstanceSpy).not.toHaveBeenCalled();
expect(instanceSpy).toHaveBeenCalledWith(editorEl, expect.anything());
});
it('creates correct model for the Diff Editor', () => {
const instance = editor.createDiffInstance({ ...defaultArguments, blobOriginalContent });
const getDiffModelValue = (model) => instance.getModel()[model].getValue();
expect(modelSpy).toHaveBeenCalledTimes(2);
expect(modelSpy.mock.calls[0]).toEqual([
blobContent,
undefined,
expect.objectContaining({
path: uriFilePath,
}),
]);
expect(modelSpy.mock.calls[1]).toEqual([blobOriginalContent, 'markdown']);
expect(getDiffModelValue('original')).toBe(blobOriginalContent);
expect(getDiffModelValue('modified')).toBe(blobContent);
});
it('correctly disposes the diff editor model', () => {
const modifiedModel = fakeModel;
const originalModel = { ...fakeModel };
mockDecorateInstance({
getModel: jest.fn().mockReturnValue({
original: originalModel,
modified: modifiedModel,
}),
});
const instance = editor.createDiffInstance({ ...defaultArguments, blobOriginalContent });
expect(editor.instances).toHaveLength(1);
expect(originalModel.dispose).not.toHaveBeenCalled();
expect(modifiedModel.dispose).not.toHaveBeenCalled();
instance.dispose();
expect(editor.instances).toHaveLength(0);
expect(originalModel.dispose).toHaveBeenCalled();
expect(modifiedModel.dispose).toHaveBeenCalled();
});
});
});
describe('multiple instances', () => {
let instanceSpy;
let inst1Args;
let inst2Args;
let editorEl1;
let editorEl2;
let inst1;
let inst2;
const readOnlyIndex = '68'; // readOnly option has the internal index of 68 in the editor's options
beforeEach(() => {
setFixtures('<div id="editor1"></div><div id="editor2"></div>');
editorEl1 = document.getElementById('editor1');
editorEl2 = document.getElementById('editor2');
inst1Args = {
el: editorEl1,
};
inst2Args = {
el: editorEl2,
blobContent,
blobPath,
};
editor = new SourceEditor();
instanceSpy = jest.spyOn(monacoEditor, 'create');
});
afterEach(() => {
editor.dispose();
});
it('can initialize several instances of the same editor', () => {
editor.createInstance(inst1Args);
expect(editor.instances).toHaveLength(1);
editor.createInstance(inst2Args);
expect(instanceSpy).toHaveBeenCalledTimes(2);
expect(editor.instances).toHaveLength(2);
});
it('sets independent models on independent instances', () => {
inst1 = editor.createInstance(inst1Args);
inst2 = editor.createInstance(inst2Args);
const model1 = inst1.getModel();
const model2 = inst2.getModel();
expect(model1).toBeDefined();
expect(model2).toBeDefined();
expect(model1).not.toEqual(model2);
});
it('does not create a new model if a model for the path & globalId combo already exists', () => {
const modelSpy = jest.spyOn(monacoEditor, 'createModel');
inst1 = editor.createInstance({ ...inst2Args, blobGlobalId });
inst2 = editor.createInstance({ ...inst2Args, el: editorEl1, blobGlobalId });
const model1 = inst1.getModel();
const model2 = inst2.getModel();
expect(modelSpy).toHaveBeenCalledTimes(1);
expect(model1).toBe(model2);
});
it('shares global editor options among all instances', () => {
editor = new SourceEditor({
readOnly: true,
});
inst1 = editor.createInstance(inst1Args);
expect(inst1.getOption(readOnlyIndex)).toBe(true);
inst2 = editor.createInstance(inst2Args);
expect(inst2.getOption(readOnlyIndex)).toBe(true);
});
it('allows overriding editor options on the instance level', () => {
editor = new SourceEditor({
readOnly: true,
});
inst1 = editor.createInstance({
...inst1Args,
readOnly: false,
});
expect(inst1.getOption(readOnlyIndex)).toBe(false);
});
it('disposes instances and relevant models independently from each other', () => {
inst1 = editor.createInstance(inst1Args);
inst2 = editor.createInstance(inst2Args);
expect(inst1.getModel()).not.toBe(null);
expect(inst2.getModel()).not.toBe(null);
expect(editor.instances).toHaveLength(2);
expect(monacoEditor.getModels()).toHaveLength(2);
inst1.dispose();
expect(inst1.getModel()).toBe(null);
expect(inst2.getModel()).not.toBe(null);
expect(editor.instances).toHaveLength(1);
expect(monacoEditor.getModels()).toHaveLength(1);
});
});
describe('implementation', () => {
let instance;
beforeEach(() => {
instance = editor.createInstance({ el: editorEl, blobPath, blobContent });
});
it('correctly proxies value from the model', () => {
expect(instance.getValue()).toBe(blobContent);
});
it('is capable of changing the language of the model', () => {
// ignore warnings and errors Monaco posts during setup
// (due to being called from Jest/Node.js environment)
jest.spyOn(console, 'warn').mockImplementation(() => {});
jest.spyOn(console, 'error').mockImplementation(() => {});
const blobRenamedPath = 'test.js';
expect(instance.getModel().getLanguageIdentifier().language).toBe('markdown');
instance.updateModelLanguage(blobRenamedPath);
expect(instance.getModel().getLanguageIdentifier().language).toBe('javascript');
});
it('falls back to plaintext if there is no language associated with an extension', () => {
const blobRenamedPath = 'test.myext';
const spy = jest.spyOn(console, 'error').mockImplementation(() => {});
instance.updateModelLanguage(blobRenamedPath);
expect(spy).not.toHaveBeenCalled();
expect(instance.getModel().getLanguageIdentifier().language).toBe('plaintext');
});
});
describe('extensions', () => {
let instance;
const alphaRes = jest.fn();
const betaRes = jest.fn();
const fooRes = jest.fn();
const barRes = jest.fn();
class AlphaClass {
constructor() {
this.res = alphaRes;
}
alpha() {
return this?.nonExistentProp || alphaRes;
}
}
class BetaClass {
beta() {
return this?.nonExistentProp || betaRes;
}
}
class WithStaticMethod {
constructor({ instance: inst, ...options } = {}) {
Object.assign(inst, options);
}
static computeBoo(a) {
return a + 1;
}
boo() {
return WithStaticMethod.computeBoo(this.base);
}
}
class WithStaticMethodExtended extends SourceEditorExtension {
static computeBoo(a) {
return a + 1;
}
boo() {
return WithStaticMethodExtended.computeBoo(this.base);
}
}
const AlphaExt = new AlphaClass();
const BetaExt = new BetaClass();
const FooObjExt = {
foo() {
return fooRes;
},
};
const BarObjExt = {
bar() {
return barRes;
},
};
describe('basic functionality', () => {
beforeEach(() => {
instance = editor.createInstance({ el: editorEl, blobPath, blobContent });
});
it('does not fail if no extensions supplied', () => {
const spy = jest.spyOn(global.console, 'error');
instance.use();
expect(spy).not.toHaveBeenCalled();
});
it("does not extend instance with extension's constructor", () => {
expect(instance.constructor).toBeDefined();
const { constructor } = instance;
expect(AlphaExt.constructor).toBeDefined();
expect(AlphaExt.constructor).not.toEqual(constructor);
instance.use(AlphaExt);
expect(instance.constructor).toBe(constructor);
});
it.each`
type | extensions | methods | expectations
${'ES6 classes'} | ${AlphaExt} | ${['alpha']} | ${[alphaRes]}
${'multiple ES6 classes'} | ${[AlphaExt, BetaExt]} | ${['alpha', 'beta']} | ${[alphaRes, betaRes]}
${'simple objects'} | ${FooObjExt} | ${['foo']} | ${[fooRes]}
${'multiple simple objects'} | ${[FooObjExt, BarObjExt]} | ${['foo', 'bar']} | ${[fooRes, barRes]}
${'combination of ES6 classes and objects'} | ${[AlphaExt, BarObjExt]} | ${['alpha', 'bar']} | ${[alphaRes, barRes]}
`('is extensible with $type', ({ extensions, methods, expectations } = {}) => {
methods.forEach((method) => {
expect(instance[method]).toBeUndefined();
});
instance.use(extensions);
methods.forEach((method) => {
expect(instance[method]).toBeDefined();
});
expectations.forEach((expectation, i) => {
expect(instance[methods[i]].call()).toEqual(expectation);
});
});
it('does not extend instance with private data of an extension', () => {
const ext = new WithStaticMethod({ instance });
ext.staticMethod = () => {
return 'foo';
};
ext.staticProp = 'bar';
expect(instance.boo).toBeUndefined();
expect(instance.staticMethod).toBeUndefined();
expect(instance.staticProp).toBeUndefined();
instance.use(ext);
expect(instance.boo).toBeDefined();
expect(instance.staticMethod).toBeUndefined();
expect(instance.staticProp).toBeUndefined();
});
it.each([WithStaticMethod, WithStaticMethodExtended])(
'properly resolves data for an extension with private data',
(ExtClass) => {
const base = 1;
expect(instance.base).toBeUndefined();
expect(instance.boo).toBeUndefined();
const ext = new ExtClass({ instance, base });
instance.use(ext);
expect(instance.base).toBe(1);
expect(instance.boo()).toBe(2);
},
);
it('uses the last definition of a method in case of an overlap', () => {
const FooObjExt2 = { foo: 'foo2' };
instance.use([FooObjExt, BarObjExt, FooObjExt2]);
expect(instance).toMatchObject({
foo: 'foo2',
...BarObjExt,
});
});
it('correctly resolves references withing extensions', () => {
const FunctionExt = {
inst() {
return this;
},
mod() {
return this.getModel();
},
};
instance.use(FunctionExt);
expect(instance.inst()).toEqual(editor.instances[0]);
});
});
describe('extensions as an instance parameter', () => {
let editorExtensionSpy;
const instanceConstructor = (extensions = []) => {
return editor.createInstance({
el: editorEl,
blobPath,
blobContent,
extensions,
});
};
beforeEach(() => {
editorExtensionSpy = jest
.spyOn(SourceEditor, 'pushToImportsArray')
.mockImplementation((arr) => {
arr.push(
Promise.resolve({
default: {},
}),
);
});
});
it.each([undefined, [], [''], ''])(
'does not fail and makes no fetch if extensions is %s',
() => {
instance = instanceConstructor(null);
expect(editorExtensionSpy).not.toHaveBeenCalled();
},
);
it.each`
type | value | callsCount
${'simple string'} | ${'foo'} | ${1}
${'combined string'} | ${'foo, bar'} | ${2}
${'array of strings'} | ${['foo', 'bar']} | ${2}
`('accepts $type as an extension parameter', ({ value, callsCount }) => {
instance = instanceConstructor(value);
expect(editorExtensionSpy).toHaveBeenCalled();
expect(editorExtensionSpy.mock.calls).toHaveLength(callsCount);
});
it.each`
desc | path | expectation
${'~/editor'} | ${'foo'} | ${'~/editor/foo'}
${'~/CUSTOM_PATH with leading slash'} | ${'/my_custom_path/bar'} | ${'~/my_custom_path/bar'}
${'~/CUSTOM_PATH without leading slash'} | ${'my_custom_path/delta'} | ${'~/my_custom_path/delta'}
`('fetches extensions from $desc path', ({ path, expectation }) => {
instance = instanceConstructor(path);
expect(editorExtensionSpy).toHaveBeenCalledWith(expect.any(Array), expectation);
});
it('emits EDITOR_READY_EVENT event after all extensions were applied', async () => {
const calls = [];
const eventSpy = jest.fn().mockImplementation(() => {
calls.push('event');
});
const useSpy = jest.fn().mockImplementation(() => {
calls.push('use');
});
jest.spyOn(SourceEditor, 'convertMonacoToELInstance').mockImplementation((inst) => {
const decoratedInstance = inst;
decoratedInstance.use = useSpy;
return decoratedInstance;
});
editorEl.addEventListener(EDITOR_READY_EVENT, eventSpy);
instance = instanceConstructor('foo, bar');
await waitForPromises();
expect(useSpy.mock.calls).toHaveLength(2);
expect(calls).toEqual(['use', 'use', 'event']);
});
});
describe('multiple instances', () => {
let inst1;
let inst2;
let editorEl1;
let editorEl2;
beforeEach(() => {
setFixtures('<div id="editor1"></div><div id="editor2"></div>');
editorEl1 = document.getElementById('editor1');
editorEl2 = document.getElementById('editor2');
inst1 = editor.createInstance({ el: editorEl1, blobPath: `foo-${blobPath}` });
inst2 = editor.createInstance({ el: editorEl2, blobPath: `bar-${blobPath}` });
});
afterEach(() => {
editor.dispose();
editorEl1.remove();
editorEl2.remove();
});
it('extends all instances if no specific instance is passed', () => {
editor.use(AlphaExt);
expect(inst1.alpha()).toEqual(alphaRes);
expect(inst2.alpha()).toEqual(alphaRes);
});
});
});
describe('languages', () => {
it('registers custom languages defined with Monaco', () => {
expect(monacoLanguages.getLanguages()).toEqual(
expect.arrayContaining([
expect.objectContaining({
id: 'vue',
}),
]),
);
});
});
describe('syntax highlighting theme', () => {
let themeDefineSpy;
let themeSetSpy;
let defaultScheme;
beforeEach(() => {
themeDefineSpy = jest.spyOn(monacoEditor, 'defineTheme').mockImplementation(() => {});
themeSetSpy = jest.spyOn(monacoEditor, 'setTheme').mockImplementation(() => {});
defaultScheme = window.gon.user_color_scheme;
});
afterEach(() => {
window.gon.user_color_scheme = defaultScheme;
});
it('sets default syntax highlighting theme', () => {
const expectedTheme = themes.find((t) => t.name === DEFAULT_THEME);
editor = new SourceEditor();
expect(themeDefineSpy).toHaveBeenCalledWith(DEFAULT_THEME, expectedTheme.data);
expect(themeSetSpy).toHaveBeenCalledWith(DEFAULT_THEME);
});
it('sets correct theme if it is set in users preferences', () => {
const expectedTheme = themes.find((t) => t.name !== DEFAULT_THEME);
expect(expectedTheme.name).not.toBe(DEFAULT_THEME);
window.gon.user_color_scheme = expectedTheme.name;
editor = new SourceEditor();
expect(themeDefineSpy).toHaveBeenCalledWith(expectedTheme.name, expectedTheme.data);
expect(themeSetSpy).toHaveBeenCalledWith(expectedTheme.name);
});
it('falls back to default theme if a selected one is not supported yet', () => {
const name = 'non-existent-theme';
const nonExistentTheme = { name };
window.gon.user_color_scheme = nonExistentTheme.name;
editor = new SourceEditor();
expect(themeDefineSpy).not.toHaveBeenCalled();
expect(themeSetSpy).toHaveBeenCalledWith(DEFAULT_THEME);
});
});
});