feat(tests): add test setup

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/node:8
+      - image: circleci/node:10.16.3
     steps:
       - checkout
       - run:
@@ -11,6 +11,9 @@ jobs:
       - run:
           name: build
           command: yarn build
+      - run:
+          name: test
+          command: yarn test
       - run:
           name: release
-          command: yarn release || true
+          command: yarn release

babel.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  presets: [['@babel/preset-env', { targets: { node: 'current' } }], '@babel/preset-typescript'],
+}

package.json

@@ -22,35 +22,44 @@
   "scripts": {
     "start": "tsc -w",
     "build": "tsc",
+    "test": "CI=true jest",
     "release": "semantic-release"
   },
   "dependencies": {
     "chalk": "^2.4.2",
-    "execa": "^2.1.0",
+    "execa": "^3.1.0",
     "simple-git": "^1.126.0",
     "yargs": "^14.2.0"
   },
   "peerDependencies": {
     "typescript": "3.x"
   },
   "devDependencies": {
+    "@babel/core": "7.6.4",
+    "@babel/preset-env": "7.6.3",
+    "@babel/preset-typescript": "7.6.0",
     "@commitlint/cli": "8.2.0",
     "@commitlint/config-conventional": "8.2.0",
     "@semantic-release/changelog": "3.0.4",
     "@semantic-release/commit-analyzer": "6.3.0",
     "@semantic-release/git": "7.0.16",
     "@semantic-release/npm": "5.2.0",
     "@semantic-release/release-notes-generator": "7.3.0",
+    "@types/fs-extra": "8.0.0",
+    "@types/jest": "24.0.19",
     "@types/yargs": "13.0.3",
-    "@typescript-eslint/eslint-plugin": "2.3.3",
-    "@typescript-eslint/parser": "2.3.3",
+    "@typescript-eslint/eslint-plugin": "2.4.0",
+    "@typescript-eslint/parser": "2.4.0",
     "eslint": "6.5.1",
     "eslint-config-prettier": "6.4.0",
     "eslint-plugin-prettier": "3.1.1",
-    "husky": "3.0.8",
+    "fs-extra": "8.1.0",
+    "husky": "3.0.9",
+    "jest": "24.9.0",
     "prettier": "1.18.2",
-    "pretty-quick": "1.11.1",
+    "pretty-quick": "2.0.0",
     "semantic-release": "^15.13.24",
+    "tmp-promise": "2.0.2",
     "typescript": "3.6.3"
   },
   "husky": {

src/main.ts

@@ -40,7 +40,7 @@ const getTypeScriptCompileOutput = async (options: TypeScriptOptions): Promise<s
 
   let tscOutput: string[] = []
   try {
-    await execa('tsc', args)
+    await execa('tsc', args, { all: true })
   } catch (error) {
     const { all } = error
     tscOutput = (all as string).split('\n')

tests/repository/src/noImplicitAny.ts

@@ -0,0 +1 @@
+const foo = (arg): void => {}

tests/repository/src/strictNullChecks.ts

@@ -0,0 +1,6 @@
+interface User {
+  age?: number
+}
+const myUser: User = {}
+
+console.log(myUser.age.toString())

tests/repository/tsconfig.json

@@ -0,0 +1,6 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "commonjs"
+  }
+}

tests/ts-strictify.spec.ts

@@ -0,0 +1,51 @@
+import simpleGit from 'simple-git/promise'
+import tmp from 'tmp-promise'
+import execa from 'execa'
+import { join } from 'path'
+import { copy, outputFile } from 'fs-extra'
+
+const runTsStrictifyInPath = async (path: string): Promise<string> => {
+  const cwd = process.cwd()
+  const tsStrictify = join(cwd, 'dist/bin.js')
+
+  process.chdir(path)
+  return execa('node', [tsStrictify])
+    .then((response) => response.stdout)
+    .catch((error) => error.stdout)
+    .finally(() => process.chdir(cwd))
+}
+
+test('files are detected correctly', async () => {
+  jest.setTimeout(20000)
+  const { path } = await tmp.dir()
+  const git = simpleGit(path)
+
+  await git
+    .init()
+    .then(() => git.addConfig('user.name', 'Some One'))
+    .then(() => git.addConfig('user.email', 'some@one.com'))
+    .then(() => copy(join(__dirname, 'repository'), path))
+    .then(() => git.add('./*'))
+    .then(() => git.commit('First commit'))
+    .then(() => runTsStrictifyInPath(path))
+    .then((stdout) => expect(stdout).toMatch(/Found 0 changed file/))
+
+  await git
+    .checkoutLocalBranch('feature')
+    .then(() => outputFile(join(path, 'foo.ts'), 'const foo = (arg): void => {}'))
+    .then(() => runTsStrictifyInPath(path))
+    .then((stdout) => {
+      expect(stdout).toMatch(/Found 1 changed file/)
+      expect(stdout).toMatch(/error TS7006: Parameter 'arg' implicitly has an 'any' type/)
+    })
+
+  await git
+    .add('./*')
+    .then(() => runTsStrictifyInPath(path))
+    .then((stdout) => expect(stdout).toMatch(/Found 1 changed file/))
+
+  await git
+    .commit('Second commit')
+    .then(() => runTsStrictifyInPath(path))
+    .then((stdout) => expect(stdout).toMatch(/Found 1 changed file/))
+})