Add clean-state tests

packages/monorepo-scripts/src/globals.d.ts

@@ -6,3 +6,22 @@ declare module 'es6-promisify';
 declare module 'semver-sort' {
     const desc: (versions: string[]) => string[];
 }
+
+declare interface LernaPackage {
+    location: string;
+    package: {
+        private?: boolean;
+        name: string;
+        main?: string;
+        config?: {
+            additionalTsTypings?: string[];
+        };
+    };
+}
+declare function lernaGetPackages(path: string): LernaPackage[];
+// lerna-get-packages declarations
+declare module 'lerna-get-packages' {
+    export = lernaGetPackages;
+}
+
+declare module 'promisify-child-process';

packages/monorepo-scripts/src/test_installation.ts

@@ -0,0 +1,57 @@
+#!/usr/bin/env node
+
+import * as fs from 'fs';
+import lernaGetPackages = require('lerna-get-packages');
+import * as _ from 'lodash';
+import * as path from 'path';
+import { exec as execAsync } from 'promisify-child-process';
+import * as rimraf from 'rimraf';
+
+import { utils } from './utils';
+
+(async () => {
+    const monorepoRootPath = path.join(__dirname, '../../..');
+    const lernaPackages = lernaGetPackages(monorepoRootPath);
+    const installablePackages = _.filter(
+        lernaPackages,
+        lernaPackage =>
+            !lernaPackage.package.private &&
+            !_.isUndefined(lernaPackage.package.main) &&
+            lernaPackage.package.main.endsWith('.js'),
+    );
+    for (const installableLernaPackage of installablePackages) {
+        const packagePath = installableLernaPackage.location;
+        const packageName = installableLernaPackage.package.name;
+        utils.log(`Testing ${packageName}`);
+        let result = await execAsync('npm pack', { cwd: packagePath });
+        const packedPackageFileName = result.stdout.trim();
+        const testDirectory = path.join(monorepoRootPath, '../test-env');
+        fs.mkdirSync(testDirectory);
+        result = await execAsync('yarn init --yes', { cwd: testDirectory });
+        utils.log(`Installing ${packedPackageFileName}`);
+        result = await execAsync(`yarn add ${packagePath}/${packedPackageFileName}`, { cwd: testDirectory });
+        const indexFilePath = path.join(testDirectory, 'index.ts');
+        fs.writeFileSync(indexFilePath, `import * as Package from '${packageName}'`);
+        const tsConfig = {
+            compilerOptions: {
+                module: 'commonjs',
+                target: 'es5',
+                lib: ['es2017', 'dom'],
+                declaration: true,
+                noImplicitReturns: true,
+                pretty: true,
+                strict: true,
+            },
+            include: ['index.ts'],
+        };
+        const tsconfigFilePath = path.join(testDirectory, 'tsconfig.json');
+        fs.writeFileSync(tsconfigFilePath, JSON.stringify(tsConfig, null, 4));
+        utils.log(`Compiling ${packageName}`);
+        await execAsync('../node_modules/typescript/bin/tsc', { cwd: testDirectory });
+        utils.log(`Successfully compiled with ${packageName} as a dependency`);
+        rimraf.sync(testDirectory);
+    }
+})().catch(err => {
+    utils.log(err.stdout);
+    process.exit(1);
+});