setup first test with atom mocks

Author: ShMcK

.gitignore

@@ -2,3 +2,7 @@
 node_modules
 npm-debug.log
 test
+.vscode
+src/coverage
+src/__tests__/__cache__
+src/__tests__/__snapshots__

.npmignore

@@ -7,3 +7,7 @@ tsconfig.json
 tsd.json
 tslint.json
 .gitattributes
+.vscode
+src/coverage
+src/__tests__/__cache__
+src/__tests__/__snapshots__

package.json

@@ -26,7 +26,7 @@
   "repository": "https://github.com/coderoad/atom-coderoad",
   "scripts": {
     "compile": "tsc",
-    "test": "tsc test/*.ts src/typings.d.ts && ava"
+    "test": "jest"
   },
   "dependencies": {
     "atom-plugin-command-line": "1.0.2",
@@ -44,6 +44,13 @@
     "redux-thunk": "2.1.0",
     "reselect": "2.5.3"
   },
+  "devDependencies": {
+    "enzyme": "^2.4.1",
+    "jest": "^15.1.1",
+    "react-addons-test-utils": "^15.3.1",
+    "react-test-renderer": "^15.3.1",
+    "tslint": "^3.15.1"
+  },
   "engines": {
     "atom": ">=1.0.0 <2.0.0"
   },
@@ -57,16 +64,30 @@
       }
     }
   },
-  "devDependencies": {
-    "enzyme": "^2.4.1",
-    "jest": "^15.1.1",
-    "react-addons-test-utils": "^15.3.1",
-    "react-test-renderer": "^15.3.1",
-    "tslint": "^3.15.1"
-  },
   "jest": {
+    "verbose": true,
     "scriptPreprocessor": "<rootDir>/src/__tests__/preprocessor.js",
-    "moduleFileExtensions": ["ts", "tsx", "js"],
-    "testRegex": "/src/*/.*\\.test\\.(ts|tsx|js)$"
+    "moduleFileExtensions": [
+      "ts",
+      "tsx",
+      "js"
+    ],
+    "testRegex": "/src/*/.*\\.test\\.(ts|tsx|js)$",
+    "coverageDirectory": "src/coverage",
+    "collectCoverage": true,
+    "coveragePathIgnorePatterns": [
+      "/node_modules/",
+      "/typings/",
+      "__tests__"
+    ],
+    "coverageThreshold": {
+      "global": {
+        "branches": 50,
+        "functions": 50,
+        "lines": 50,
+        "statements": 50
+      }
+    },
+    "cacheDirectory": "src/__tests__/__cache__"
   }
 }

src/__tests__/mocks/atom.ts

@@ -0,0 +1,11 @@
+/**
+ * Mock atom file path
+ * @param  {string} path file path
+ */
+export const atomPath = (path: string) => ({
+  project: {
+    rootDirectories: [{
+      path
+    }]
+  }
+});

src/modules/dir/index.ts

@@ -1,9 +1,16 @@
+/**
+ * User directory path Redux reducer
+ * @param  {string} dir default user directory path
+ * @returns string user directory path
+ */
 export default function dirReducer(
   dir: string
 ): string {
-  if (atom.project.rootDirectories.length > 0) {
+  if (!atom) {
+    throw new Error('No project directory found. Atom may not be initialized.');
+  }
+  if (atom && atom.project.rootDirectories.length > 0) {
     return atom.project.rootDirectories[0].path;
-  } else {
-    return '';
   }
+  return dir;
 }

src/modules/dir/reducer.test.ts

@@ -0,0 +1,20 @@
+import dir from './index';
+import {atomPath} from '../../__tests__/mocks/atom';
+
+describe('dir reducer', () => {
+
+  afterEach(() => {
+    global.atom = null;
+  });
+
+  it('should return the project directory in Atom', () => {
+    const pathToDir = './path/to/dir'; 
+    global.atom = atomPath(pathToDir);
+    expect(dir()).toBe(pathToDir);
+  });
+
+  it('should throw an error if no project directory is found', () => {
+    expect(() => dir()).toThrowError(/No project directory/);
+  });
+
+});

tsconfig.json

@@ -20,8 +20,12 @@
   "*.ts",
   "**/*.ts",
   "**/*.tsx",
+  "!coverage",
+  "!__tests__",
   "!**/*.spec.ts",
-  "!**/*.spec.tsx"
+  "!**/*.spec.tsx",
+  "!**/*.test.ts",
+  "!**/*.test.tsx"
  ],
  "exclude": [
   "node_modules"