1 files changed, 114 insertions, 0 deletions
diff --git a/scripts/frontend/test.js b/scripts/frontend/test.js
new file mode 100755
index 00000000000..dab7176f8c1
--- /dev/null
+++ b/scripts/frontend/test.js
@@ -0,0 +1,114 @@
+#!/usr/bin/env node
+
+const { spawn } = require('child_process');
+const { EOL } = require('os');
+const program = require('commander');
+const chalk = require('chalk');
+
+const JEST_ROUTE = 'spec/frontend';
+const KARMA_ROUTE = 'spec/javascripts';
+const COMMON_ARGS = ['--colors'];
+const JEST_ARGS = ['--passWithNoTests'];
+const KARMA_ARGS = ['--no-fail-on-empty-test-suite'];
+const SUCCESS_CODE = 0;
+
+program
+  .version('0.1.0')
+  .usage('[options] <file ...>')
+  .option('-p, --parallel', 'Run tests suites in parallel')
+  .parse(process.argv);
+
+const isSuccess = code => code === SUCCESS_CODE;
+
+const combineExitCodes = codes => {
+  const firstFail = codes.find(x => !isSuccess(x));
+
+  return firstFail === undefined ? SUCCESS_CODE : firstFail;
+};
+
+const skipIfFail = fn => code => (isSuccess(code) ? fn() : code);
+
+const endWithEOL = str => (str[str.length - 1] === '\n' ? str : `${str}${EOL}`);
+
+const runTests = paths => {
+  if (program.parallel) {
+    return Promise.all([runJest(paths), runKarma(paths)]).then(combineExitCodes);
+  } else {
+    return runJest(paths).then(skipIfFail(() => runKarma(paths)));
+  }
+};
+
+const spawnYarnScript = (cmd, args) => {
+  return new Promise((resolve, reject) => {
+    const proc = spawn('yarn', ['run', cmd, ...args]);
+    const output = data => {
+      const text = data
+        .toString()
+        .split(/\r?\n/g)
+        .map((line, idx, { length }) =>
+          idx === length - 1 && !line ? line : `${chalk.gray(cmd)}: ${line}`,
+        )
+        .join(EOL);
+
+      return endWithEOL(text);
+    };
+
+    proc.stdout.on('data', data => {
+      process.stdout.write(output(data));
+    });
+
+    proc.stderr.on('data', data => {
+      process.stderr.write(output(data));
+    });
+
+    proc.on('close', code => {
+      process.stdout.write(output(`exited with code ${code}`));
+
+      // We resolve even on a failure code because a `reject` would cause
+      // Promise.all to reject immediately (without waiting for other promises)
+      // to finish.
+      resolve(code);
+    });
+  });
+};
+
+const runJest = args => {
+  return spawnYarnScript('jest', [...JEST_ARGS, ...COMMON_ARGS, ...toJestArgs(args)]);
+};
+
+const runKarma = args => {
+  return spawnYarnScript('karma', [...KARMA_ARGS, ...COMMON_ARGS, ...toKarmaArgs(args)]);
+};
+
+const replacePath = to => path =>
+  path
+    .replace(JEST_ROUTE, to)
+    .replace(KARMA_ROUTE, to)
+    .replace('app/assets/javascripts', to);
+
+const replacePathForJest = replacePath(JEST_ROUTE);
+
+const replacePathForKarma = replacePath(KARMA_ROUTE);
+
+const toJestArgs = paths => paths.map(replacePathForJest);
+
+const toKarmaArgs = paths =>
+  paths.reduce((acc, path) => acc.concat('-f', replacePathForKarma(path)), []);
+
+const main = paths => {
+  runTests(paths).then(code => {
+    console.log('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~');
+    if (isSuccess(code)) {
+      console.log(chalk.bgGreen(chalk.black('All tests passed :)')));
+    } else {
+      console.log(chalk.bgRed(chalk.white(`Some tests failed :(`)));
+    }
+    console.log('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~');
+
+    if (!isSuccess(code)) {
+      process.exit(code);
+    }
+  });
+};
+
+main(program.args);