add spec support for Node 13 and 14

spec/ci/node_13_metrics_spec.rb

@@ -0,0 +1,25 @@
+require_relative '../spec_helper'
+
+describe "Node Metrics for v13.x" do
+  context "test metrics for Node v13.x app" do
+    let(:app) {
+      Hatchet::Runner.new(
+        "spec/fixtures/repos/node-13-metrics",
+        config: {
+          "HEROKU_METRICS_URL" => "http://localhost:3000",
+          "METRICS_INTERVAL_OVERRIDE" => "10000"
+        }
+      )
+    }
+
+    it "should deploy" do
+      app.deploy do |app|
+        data = successful_json_body(app)
+        expect(data["gauges"]["node.eventloop.delay.ms.max"]).to be >= 2000
+        expect(data["counters"]["node.gc.collections"]).to be >= 0
+        expect(data["counters"]["node.gc.young.collections"]).to be >= 0
+        expect(data["counters"]["node.gc.old.collections"]).to be >= 0
+      end
+    end
+  end
+end

spec/ci/node_13_spec.rb

@@ -0,0 +1,16 @@
+require_relative '../spec_helper'
+
+describe "Hello World for Node v13.x" do
+  context "a single-process Node v13.x app" do
+    let(:app) {
+      Hatchet::Runner.new("spec/fixtures/repos/node-13")
+    }
+
+    it "should deploy successfully" do
+      app.deploy do |app|
+        expect(successful_body(app).strip).to eq("Hello, world!")
+      end
+    end
+
+  end
+end

spec/ci/node_14_metrics_spec.rb

@@ -0,0 +1,25 @@
+require_relative '../spec_helper'
+
+describe "Node Metrics for v14.x" do
+  context "test metrics for Node v14.x app" do
+    let(:app) {
+      Hatchet::Runner.new(
+        "spec/fixtures/repos/node-14-metrics",
+        config: {
+          "HEROKU_METRICS_URL" => "http://localhost:3000",
+          "METRICS_INTERVAL_OVERRIDE" => "10000"
+        }
+      )
+    }
+
+    it "should deploy" do
+      app.deploy do |app|
+        data = successful_json_body(app)
+        expect(data["gauges"]["node.eventloop.delay.ms.max"]).to be >= 2000
+        expect(data["counters"]["node.gc.collections"]).to be >= 0
+        expect(data["counters"]["node.gc.young.collections"]).to be >= 0
+        expect(data["counters"]["node.gc.old.collections"]).to be >= 0
+      end
+    end
+  end
+end

spec/ci/node_14_spec.rb

@@ -0,0 +1,16 @@
+require_relative '../spec_helper'
+
+describe "Hello World for Node v14.x" do
+  context "a single-process Node v14.x app" do
+    let(:app) {
+      Hatchet::Runner.new("spec/fixtures/repos/node-14")
+    }
+
+    it "should deploy successfully" do
+      app.deploy do |app|
+        expect(successful_body(app).strip).to eq("Hello, world!")
+      end
+    end
+
+  end
+end

spec/fixtures/repos/node-14-metrics/Procfile

@@ -0,0 +1 @@
+web: node index.js

spec/fixtures/repos/node-14-metrics/index.js

@@ -0,0 +1,72 @@
+#!/usr/bin/env node
+
+const http = require('http');
+const EventEmitter = require('events');
+
+const PORT = process.env.PORT || 5000;
+const Events = new EventEmitter();
+
+// This will block the event loop for ~lengths of time
+function blockCpuFor(ms) {
+  return new Promise((resolve, reject) => {
+    setTimeout(() => {
+      console.log(`blocking the event loop for ${ms}ms`);
+      let now = new Date().getTime();
+      let result = 0
+      while(true) {
+        result += Math.random() * Math.random();
+        if (new Date().getTime() > now + ms)
+          break;
+      }
+      resolve();
+    }, 100);
+  });
+}
+
+function getNextMetricsEvent() {
+  return new Promise((resolve, reject) => Events.once('metrics', resolve));
+}
+
+const server = http.createServer((req, res) => {
+  // wait for the next metrics event
+  getNextMetricsEvent()
+    .then(blockCpuFor(2000))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    .then(blockCpuFor(100))
+    // gather the next metrics data which should include these pauses
+    .then(getNextMetricsEvent())
+    .then(data => {
+      res.setHeader('Content-Type', 'application/json');
+      res.end(data);
+    })
+    .catch(() => {
+      res.statusCode = 500;
+      res.end("Something went wrong");
+    });
+});
+
+server.listen(PORT, () => console.log(`Listening on ${PORT}`));
+
+// Create a second server that intercepts the HTTP requests
+// sent by the metrics plugin
+const metricsListener = http.createServer((req, res) => {
+  if (req.method == 'POST') {
+    let body = '';
+    req.on('data', (data) => body += data);
+    req.on('end', () => {
+      res.statusCode = 200;
+      res.end();
+      Events.emit('metrics', body)
+    });
+  }
+});
+
+metricsListener.listen(3000, () => console.log('Listening for metrics on 3000'));

spec/fixtures/repos/node-14-metrics/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "node-metrics-test-app",
+  "version": "1.0.0",
+  "engines": {
+    "node": "14.x"
+  },
+  "main": "index.js",
+  "license": "MIT",
+  "devDependencies": {},
+  "dependencies": {}
+}

spec/fixtures/repos/node-14/Procfile

@@ -0,0 +1 @@
+web: node index.js

spec/fixtures/repos/node-14/app.json

@@ -0,0 +1,3 @@
+{
+  "name": "hello-world"
+}

spec/fixtures/repos/node-14/index.js

@@ -0,0 +1,46 @@
+#!/usr/bin/env node
+
+const http = require('http');
+const crypto = require('crypto');
+
+const PORT = process.env.PORT || 5000;
+
+// This will block the event loop for ~lengths of time
+function blockCpuFor(ms) {
+	var now = new Date().getTime();
+	var result = 0
+	while(true) {
+		result += Math.random() * Math.random();
+		if (new Date().getTime() > now +ms)
+			return;
+	}
+}
+
+// block the event loop for 100ms every second
+setInterval(() => {
+  blockCpuFor(100);
+}, 1000)
+
+// block the event loop for 1sec every 30 seconds
+setInterval(() => {
+  blockCpuFor(1000);
+}, 30000)
+
+// Allocate and erase memory on an interval
+let store = [];
+
+setInterval(() => {
+  store.push(crypto.randomBytes(1000000).toString('hex'));
+}, 500);
+
+setInterval(() => {
+  store = [];
+}, 60000);
+
+const server = http.createServer((req, res) => {
+  res.statusCode = 200;
+  res.setHeader('Content-Type', 'text/plain');
+  res.end("Hello, world!");
+})
+
+server.listen(PORT, () => console.log(`Listening on ${PORT}`));

spec/fixtures/repos/node-14/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "hello-world",
+  "version": "1.0.0",
+  "engines": {
+    "node": "14.x"
+  },
+  "scripts": {
+    "prettify": "prettier --single-quote --trailing-comma all --write 'bin/*' 'src/**/*.js'",
+    "test": "jest --silent",
+    "dev": "nodemon --watch . --watch src/* src/index.js",
+    "build": "echo NODE_OPTIONS: $NODE_OPTIONS"
+  },
+  "main": "index.js",
+  "license": "MIT",
+  "devDependencies": {
+    "jest": "^19.0.2",
+    "nodemon": "^1.19.4",
+    "prettier": "^0.22.0"
+  },
+  "dependencies": {}
+}

spec/spec_helper.rb

@@ -63,12 +63,12 @@ def resolve_all_supported_node_versions(options = {})
   result = run!("#{resolve_binary_path} list node")
   list = result.lines().map { |line| line.split(' ').first }
   list.select do |n|
-    SemVersion.new(n).satisfies?('>= 6.0.0')
+    SemVersion.new(n).satisfies?('>= 10.0.0')
   end
 end
 
 def version_supports_metrics(version)
-  SemVersion.new(version).satisfies?('>= 8.0.0') && SemVersion.new(version).satisfies?('< 14.0.0')
+  SemVersion.new(version).satisfies?('>= 10.0.0') && SemVersion.new(version).satisfies?('< 15.0.0')
 end
 
 def get_test_versions
@@ -77,7 +77,7 @@ def get_test_versions
   elsif ENV['TEST_ALL_NODE_VERSIONS'] == 'true'
     versions = resolve_all_supported_node_versions()
   else
-    versions = resolve_node_version(['6.x', '8.x', '9.x', '10.x', '11.x'])
+    versions = resolve_node_version(['10.x', '12.x', '13.x', '14.x'])
   end
   puts("Running tests for Node versions: #{versions.join(', ')}")
   versions