Add unit tests

.github/workflows/node.js.yml

@@ -9,3 +9,5 @@ on:
 jobs:
   build:
     uses: nasa-gcn/.github/.github/workflows/node.yml@main
+    with:
+      test-options:

__tests__/elasticsearch/app.arc

@@ -0,0 +1,12 @@
+@app
+project
+
+@http
+get /
+
+@search
+sandboxEngine elasticsearch
+
+@plugins
+nasa-gcn/architect-plugin-search
+  src ../../index.js

__tests__/elasticsearch/src/http/get-index/index.mjs

@@ -0,0 +1,28 @@
+import { search } from '@nasa-gcn/architect-functions-search'
+import { ConnectionError } from '@opensearch-project/opensearch/lib/errors.js'
+
+export async function handler() {
+  let statusCode = 200,
+    result = {}
+
+  const client = await search()
+  try {
+    result = await client.info()
+  } catch (e) {
+    if (e instanceof ConnectionError) {
+      statusCode = 503
+    } else {
+      throw e
+    }
+  }
+
+  return {
+    statusCode,
+    body: JSON.stringify(result),
+    headers: {
+      'cache-control':
+        'no-cache, no-store, must-revalidate, max-age=0, s-maxage=0',
+      'content-type': 'application/json; charset=utf8',
+    },
+  }
+}

__tests__/opensearch/app.arc

@@ -0,0 +1,12 @@
+@app
+project
+
+@http
+get /
+
+@search
+sandboxEngine opensearch
+
+@plugins
+nasa-gcn/architect-plugin-search
+  src ../../index.js

__tests__/opensearch/src

@@ -0,0 +1 @@
+../elasticsearch/src

__tests__/test.ts

@@ -0,0 +1,75 @@
+import assert from 'node:assert'
+import { dirname, join } from 'node:path'
+import { afterEach, beforeEach, describe, test } from 'node:test'
+import { fileURLToPath } from 'node:url'
+import { spawn, untilTerminated } from '../processes'
+import { ChildProcess } from 'node:child_process'
+
+async function sleep(timeout: number) {
+  return new Promise((resolve) => setTimeout(resolve, timeout))
+}
+
+async function fetchRetry(
+  ...props: Parameters<typeof fetch>
+): ReturnType<typeof fetch> {
+  let response
+  try {
+    response = await fetch(...props)
+  } catch (e) {
+    if (!(e instanceof TypeError)) throw e
+  }
+
+  if (response?.ok) {
+    return response
+  } else {
+    await sleep(1000)
+    return await fetchRetry(...props)
+  }
+}
+
+const signals = ['SIGTERM'] as const
+const engines = ['elasticsearch', 'opensearch']
+
+engines.forEach((engine) =>
+  signals.forEach((signal) => {
+    describe(`${engine} stops when sent signal ${signal}`, () => {
+      let process: ChildProcess
+
+      beforeEach(async () => {
+        // FIXME: replace with import.meta.resolve once it is stable in Node.js
+        const cwd = join(dirname(fileURLToPath(import.meta.url)), engine)
+
+        process = await spawn('npx', ['arc', 'sandbox'], {
+          cwd,
+          stdio: 'inherit',
+        })
+      })
+
+      afterEach(async () => {
+        const processIsDead = untilTerminated(process)
+
+        assert.ok(process.kill(signal))
+        // Make sure arc sandbox is dead
+        await processIsDead
+        // Give subprocesses some time to die
+        await sleep(1000)
+
+        // Make sure that arc sandbox and opensearch/elasticseasrch are both
+        // down and not responding to HTTP requests any more
+        for (const port of [3333, 9200]) {
+          assert.rejects(
+            fetch(`http://localhost:${port}/`),
+            TypeError,
+            'fetch failed'
+          )
+        }
+      })
+
+      test('connection was alive', async () => {
+        const response = await fetchRetry('http://localhost:3333/')
+        const result = await response.json()
+        assert.deepStrictEqual(result?.meta.connection.status, 'alive')
+      })
+    })
+  })
+)