fix: add unit tests for yarn.ts

jest.config.js

@@ -1,8 +1,9 @@
-const { jest } = require("@dmeents/maestro");
+const { jest } = require('@dmeents/maestro');
 
 module.exports = {
   ...jest({
-    packageName: "semantic-release-yarn",
-    tsconfig: "./tsconfig.json",
+    packageName: 'semantic-release-yarn',
+    isNode: true,
+    tsconfig: 'tsconfig.json',
   }),
 };

package.json

@@ -53,6 +53,7 @@
     "jest-junit": "^15.0.0",
     "prettier": "^2.8.0",
     "semantic-release": "^19.0.5",
+    "tempy": "^1.0.1",
     "ts-jest": "^29.0.3",
     "typescript": "^4.9.3"
   },

renovate.json

@@ -2,7 +2,8 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "ignoreDeps": [
     "execa",
-    "read-pkg"
+    "read-pkg",
+    "tempy"
   ],
   "extends": [
     ":autodetectPinVersions",

src/utils/yarn.test.ts

@@ -0,0 +1,94 @@
+import * as fs from 'fs';
+import { Yarn } from './yarn';
+import tempy from 'tempy';
+
+const HOME = tempy.directory();
+const YARN_RC_FILENAME = 'yarnrc.test.yaml';
+const yarn = new Yarn({ HOME, YARN_RC_FILENAME });
+
+describe('Yarn', () => {
+  it('setNpmRegistryServer', async () => {
+    await yarn.setNpmRegistryServer('https://registry.npmjs.org');
+    expect(await yarn.getNpmRegistryServer()).toBe(
+      'https://registry.npmjs.org',
+    );
+  });
+
+  it('setNpmAuthToken', async () => {
+    const token = '__dummy_token__';
+    await yarn.setNpmAuthToken(token);
+    expect(await yarn.getNpmAuthToken()).toBe(token);
+  });
+
+  it('with real NPM_TOKEN', async () => {
+    const NPM_TOKEN = process.env['NPM_TOKEN'] as string;
+    expect(NPM_TOKEN).toBeDefined();
+
+    await yarn.setNpmAuthToken(NPM_TOKEN);
+    expect(await yarn.authenticated()).toBe(true);
+  });
+
+  it('invalid NPM_TOKEN', async () => {
+    await yarn.setNpmAuthToken('invalid');
+    expect(await yarn.authenticated()).toBe(false);
+  });
+
+  it('version', async () => {
+    const cwd = tempy.directory();
+    const packageJson = `${cwd}/package.json`;
+
+    fs.writeFileSync(
+      packageJson,
+      JSON.stringify({ version: '1.0.0', packageManager: 'yarn@3.1.0' }),
+    );
+
+    function getVersion(): string {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+      return JSON.parse(fs.readFileSync(packageJson, 'utf8')).version as string;
+    }
+
+    const yarn = new Yarn({ HOME, YARN_RC_FILENAME, cwd });
+    await yarn.install();
+    await yarn.pluginImportVersion();
+    await yarn.version('1.0.1');
+    expect(getVersion()).toBe('1.0.1');
+  });
+
+  it('yarnPackDryRun', async () => {
+    const cwd = tempy.directory();
+    const packageJson = `${cwd}/package.json`;
+    fs.writeFileSync(
+      packageJson,
+      JSON.stringify({ version: '1.0.0', packageManager: 'yarn@3.1.0' }),
+    );
+
+    fs.mkdirSync(`${cwd}/lib`);
+    fs.writeFileSync(`${cwd}/lib/index.js`, '');
+    const yarn = new Yarn({ HOME, YARN_RC_FILENAME, cwd });
+    const files = await yarn.packDryRun();
+    expect(files).toMatchInlineSnapshot(`
+      [
+        "lib/index.js",
+        "package.json",
+      ]
+    `);
+  });
+
+  it('yarnPack', async () => {
+    const cwd = tempy.directory();
+    const packageJson = `${cwd}/package.json`;
+
+    fs.writeFileSync(
+      packageJson,
+      JSON.stringify({
+        name: 'mypkg',
+        version: '1.0.0',
+        packageManager: 'yarn@3.1.0',
+      }),
+    );
+
+    const yarn = new Yarn({ HOME, YARN_RC_FILENAME, cwd });
+    await yarn.pack('%s-%v.tgz');
+    expect(fs.readdirSync(cwd)).toContain('mypkg-1.0.0.tgz');
+  });
+});

yarn.lock

@@ -452,6 +452,7 @@ __metadata:
     read-pkg: ^5.2.0
     semantic-release: ^19.0.5
     semver: ^7.3.8
+    tempy: ^1.0.1
     ts-jest: ^29.0.3
     typescript: ^4.9.3
   languageName: unknown
@@ -6952,7 +6953,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"tempy@npm:^1.0.0":
+"tempy@npm:^1.0.0, tempy@npm:^1.0.1":
   version: 1.0.1
   resolution: "tempy@npm:1.0.1"
   dependencies: