add tests

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.dockerignore

@@ -1 +1,2 @@
+/coverage
 /node_modules

.eslintrc.json

@@ -1,11 +1,13 @@
 {
   "env": {
     "node": true,
-    "es2021": true
+    "es2021": true,
+    "jest": true
   },
   "extends": [
     "eslint:recommended",
     "plugin:@typescript-eslint/recommended",
+    "plugin:jest/recommended",
     "plugin:prettier/recommended"
   ],
   "parser": "@typescript-eslint/parser",
@@ -15,6 +17,7 @@
   },
   "plugins": [
     "@typescript-eslint",
+    "jest",
     "prettier"
   ]
 }

.gitignore

@@ -1,11 +1,6 @@
-/.dev
 node_modules
 lib
 
-# Jetbrains
-/.idea
-/*.iml
-
 # Rest of the file pulled from https://github.com/github/gitignore/blob/master/Node.gitignore
 # Logs
 logs

__tests__/context.test.ts

@@ -0,0 +1,65 @@
+import {beforeEach, describe, expect, test} from '@jest/globals';
+
+import * as context from '../src/context';
+
+describe('getInputs', () => {
+  beforeEach(() => {
+    process.env = Object.keys(process.env).reduce((object, key) => {
+      if (!key.startsWith('INPUT_')) {
+        object[key] = process.env[key];
+      }
+      return object;
+    }, {});
+  });
+
+  // prettier-ignore
+  test.each([
+    [
+      0,
+      new Map<string, string>([]),
+      {
+        image: 'tonistiigi/binfmt:latest',
+        platforms: 'all',
+      } as context.Inputs
+    ],
+    [
+      1,
+      new Map<string, string>([
+        ['image', 'docker/binfmt:latest'],
+        ['platforms', 'arm64,riscv64,arm'],
+      ]),
+      {
+        image: 'docker/binfmt:latest',
+        platforms: 'arm64,riscv64,arm',
+      } as context.Inputs
+    ],
+    [
+      2,
+      new Map<string, string>([
+        ['platforms', 'arm64, riscv64, arm '],
+      ]),
+      {
+        image: 'tonistiigi/binfmt:latest',
+        platforms: 'arm64,riscv64,arm',
+      } as context.Inputs
+    ]
+  ])(
+    '[%d] given %p as inputs, returns %p',
+    async (num: number, inputs: Map<string, string>, expected: context.Inputs) => {
+      inputs.forEach((value: string, name: string) => {
+        setInput(name, value);
+      });
+      const res = await context.getInputs();
+      expect(res).toEqual(expected);
+    }
+  );
+});
+
+// See: https://github.com/actions/toolkit/blob/master/packages/core/src/core.ts#L67
+function getInputName(name: string): string {
+  return `INPUT_${name.replace(/ /g, '_').toUpperCase()}`;
+}
+
+function setInput(name: string, value: string): void {
+  process.env[getInputName(name)] = value;
+}

dev.Dockerfile

@@ -59,3 +59,11 @@ FROM deps AS lint
 RUN --mount=type=bind,target=.,rw \
   --mount=type=cache,target=/src/node_modules \
   yarn run lint
+
+FROM deps AS test
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run test --coverageDirectory=/tmp/coverage
+
+FROM scratch AS test-coverage
+COPY --from=test /tmp/coverage /

docker-bake.hcl

@@ -45,3 +45,9 @@ target "vendor-validate" {
   target = "vendor-validate"
   output = ["type=cacheonly"]
 }
+
+target "test" {
+  dockerfile = "dev.Dockerfile"
+  target = "test-coverage"
+  output = ["./coverage"]
+}

jest.config.ts

@@ -0,0 +1,29 @@
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+
+const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'docker-setup-qemu-action-'));
+
+process.env = Object.assign({}, process.env, {
+  TEMP: tmpDir,
+  GITHUB_REPOSITORY: 'docker/setup-qemu-action',
+  RUNNER_TEMP: path.join(tmpDir, 'runner-temp'),
+  RUNNER_TOOL_CACHE: path.join(tmpDir, 'runner-tool-cache')
+}) as {
+  [key: string]: string;
+};
+
+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  testMatch: ['**/*.test.ts'],
+  transform: {
+    '^.+\\.ts$': 'ts-jest'
+  },
+  moduleNameMapper: {
+    '^csv-parse/sync': '<rootDir>/node_modules/csv-parse/dist/cjs/sync.cjs'
+  },
+  collectCoverageFrom: ['src/**/{!(main.ts),}.ts'],
+  coveragePathIgnorePatterns: ['lib/', 'node_modules/', '__mocks__/', '__tests__/'],
+  verbose: true
+};

package.json

@@ -4,9 +4,10 @@
   "main": "lib/main.js",
   "scripts": {
     "build": "ncc build src/main.ts --source-map --minify --license licenses.txt",
-    "lint": "eslint src/**/*.ts",
-    "format": "eslint --fix src/**/*.ts",
-    "all": "yarn run build && yarn run format"
+    "lint": "eslint src/**/*.ts __tests__/**/*.ts",
+    "format": "eslint --fix src/**/*.ts __tests__/**/*.ts",
+    "test": "jest --coverage",
+    "all": "yarn run build && yarn run format && yarn test"
   },
   "repository": {
     "type": "git",
@@ -36,8 +37,11 @@
     "@vercel/ncc": "^0.33.3",
     "eslint": "^8.11.0",
     "eslint-config-prettier": "^8.5.0",
+    "eslint-plugin-jest": "^26.1.1",
     "eslint-plugin-prettier": "^4.0.0",
+    "jest": "^27.2.5",
     "prettier": "^2.3.1",
+    "ts-jest": "^27.1.2",
     "ts-node": "^10.7.0",
     "typescript": "^4.4.4"
   }

tsconfig.json

@@ -1,17 +1,21 @@
 {
   "compilerOptions": {
+    "esModuleInterop": true,
     "target": "es6",
     "module": "commonjs",
+    "strict": true,
     "newLine": "lf",
     "outDir": "./lib",
     "rootDir": "./src",
-    "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
-    "strict": true,
     "noImplicitAny": false,
+    "resolveJsonModule": true,
     "useUnknownInCatchVariables": false,
   },
   "exclude": [
-    "node_modules"
+    "./__tests__/**/*",
+    "./lib/**/*",
+    "node_modules",
+    "jest.config.ts"
   ]
 }