Fix errors and add test cases

Author: jahn96

jest.config.js

@@ -4,12 +4,8 @@ module.exports = {
   verbose: true,
   preset: 'ts-jest/presets/js-with-babel',
   transform: {
-<<<<<<< HEAD
     '^.+\\.tsx?$': 'ts-jest',
     '^.+\\.(js|jsx)$': 'babel-jest'
-=======
-    '^.+\\.tsx?$': 'ts-jest'
->>>>>>> Remove unnecessary setup
   },
   setupFiles: ['<rootDir>/testutils/jest-setup-files.js'],
   moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],

package.json

@@ -75,6 +75,7 @@
     "eslint": "^7.5.0",
     "@babel/core": "^7",
     "@babel/preset-env": "^7",
+    "@jupyterlab/testutils": "^2.2.7",
     "@testing-library/react": "^11.1.1",
     "@types/jest": "^26.0.15",
     "eslint-config-prettier": "^6.10.1",

test/codeSnippetContentsService.test.ts

@@ -130,3 +130,46 @@ test('test delete', async () => {
   const path = 'foo/test';
   await codeSnippetContentsService.delete(path);
 });
+
+// test('test save', () => {
+//   const newContent = {
+//     name: 'new_array',
+//     description:
+//       'Scala program of array. Declare, print, and calculate sum of all elements.',
+//     language: 'Scala',
+//     code: [],
+//     id: 11,
+//     tags: ['math']
+//   };
+//   codeSnippetContentsService.save('snippets/sum_array.json', {
+//     type: 'file',
+//     format: 'text',
+//     content: JSON.stringify(newContent)
+//   });
+
+//   const data = codeSnippetContentsService.getData(
+//     'snippets/sum_array.json',
+//     'file'
+//   );
+
+//   data.then(val => expect(JSON.parse(val.content).code.length).toBe(0));
+// });
+
+// test('test rename', () => {
+//   const oldPath = 'snippets/sum_array.json';
+//   const newPath = 'snippets/new_array.json';
+//   codeSnippetContentsService.rename(oldPath, newPath);
+
+//   codeSnippetContentsService
+//     .getData(newPath, 'file')
+//     .then(val => expect(val).toBeTruthy());
+// });
+
+// test('test delete', () => {
+//   const path = 'snippets/sum_array.json';
+//   codeSnippetContentsService.delete(path);
+
+//   codeSnippetContentsService
+//     .getData(path, 'file')
+//     .then(val => expect(val).toBeNull());
+// });