Add test suite for headless

Summary:
Adds a JS test suite for running jest tests against flipper headless binaries. Replaces the jq-based bash script.

Simple sanity test included for all expected top level keys in output JSON.

Reviewed By: passy

Differential Revision: D15625723

fbshipit-source-id: 5ec8e764bcdbb99d9070de704e76a5cd9d8e5dc6

headless-tests/.babelrc

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+{
+  "presets": ["@babel/preset-env", "@babel/preset-flow"]
+}

headless-tests/__tests__/headlessIntegrationTests.js

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+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import {spawn} from 'child_process';
+// $FlowFixMe
+import memoize from 'lodash.memoize';
+
+const TEST_TIMEOUT_MS = 30 * 1000;
+
+const params = {
+  bin: process.env.FLIPPER_PATH || '/tmp/flipper-macos',
+  securePort: process.env.SECURE_PORT || '8088',
+  insecurePort: process.env.INSECURE_PORT || '8089',
+  device: process.env.DEVICE,
+};
+
+if (!params.device) {
+  console.warn(
+    'No device specified. Test may fail if more than one is present.',
+  );
+}
+
+const basicArgs = [
+  '-v',
+  ...(params.device ? ['--device', params.device] : []),
+  '--secure-port',
+  params.securePort,
+  '--insecure-port',
+  params.insecurePort,
+];
+
+const runHeadless = memoize((args: Array<string>) => {
+  return new Promise((resolve, reject) => {
+    const stdoutChunks = [];
+    const stderrChunks = [];
+    console.info(`Running ${params.bin} ${args.join(' ')}`);
+    const process = spawn(params.bin, args, {});
+    process.stdout.setEncoding('utf8');
+    process.stdout.on('data', chunk => {
+      stdoutChunks.push(chunk);
+    });
+    process.stderr.on('data', chunk => {
+      stderrChunks.push(chunk);
+    });
+    process.stdout.on('end', chunk => {
+      const stdout = stdoutChunks.join('');
+      try {
+        resolve(JSON.parse(stdout));
+      } catch (e) {
+        console.warn(stderrChunks.join(''));
+        reject(
+          `Failed to parse headless output as JSON (${e.message}): ${stdout}`,
+        );
+      }
+    });
+
+    setTimeout(() => {
+      process.kill('SIGINT');
+    }, 10000);
+  });
+});
+
+test(
+  'Flipper app appears in exported clients',
+  () => {
+    return runHeadless(basicArgs).then(result => {
+      expect(result.clients.map(c => c.query.app)).toContain('Flipper');
+    });
+  },
+  TEST_TIMEOUT_MS,
+);
+
+test(
+  'Output includes fileVersion',
+  () => {
+    return runHeadless(basicArgs).then(result => {
+      expect(result.fileVersion).toMatch(/[0-9]+\.[0-9]+\.[0-9]+/);
+    });
+  },
+  TEST_TIMEOUT_MS,
+);
+
+test(
+  'Output includes device',
+  () => {
+    return runHeadless(basicArgs).then(result => {
+      expect(result.device).toBeTruthy();
+    });
+  },
+  TEST_TIMEOUT_MS,
+);
+
+test(
+  'Output includes flipperReleaseRevision',
+  () => {
+    return runHeadless(basicArgs).then(result => {
+      expect(result.flipperReleaseRevision).toBeTruthy();
+    });
+  },
+  TEST_TIMEOUT_MS,
+);
+
+test(
+  'Output includes store',
+  () => {
+    return runHeadless(basicArgs).then(result => {
+      expect(result.store).toBeTruthy();
+    });
+  },
+  TEST_TIMEOUT_MS,
+);

headless-tests/package.json

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+{
+  "name": "headless-tests",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "test": "jest",
+    "test:debug": "node --inspect node_modules/.bin/jest --runInBand"
+  },
+  "jest": {
+    "transform": {
+      "^.+\\.jsx?$": "babel-jest"
+    }
+  },
+  "devDependencies": {
+    "jest": "^24.7.1"
+  },
+  "license": "MIT",
+  "dependencies": {
+    "@babel/preset-env": "^7.4.5",
+    "@babel/preset-flow": "^7.0.0",
+    "babel-jest": "^24.8.0",
+    "lodash.memoize": "^4.1.2"
+  }
+}