From 486dbc1e2aebfececb6885456b563d552da2d814 Mon Sep 17 00:00:00 2001
From: Clement Denis <le.mikmac@gmail.com>
Date: Fri, 29 May 2020 14:35:41 +0200
Subject: [PATCH] add js build and test

---
 js/tests/Dockerfile    |  8 +++++
 js/tests/entrypoint.sh | 23 ++++++++++++
 js/tests/test.mjs      | 80 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 111 insertions(+)
 create mode 100644 js/tests/Dockerfile
 create mode 100644 js/tests/entrypoint.sh
 create mode 100644 js/tests/test.mjs

diff --git a/js/tests/Dockerfile b/js/tests/Dockerfile
new file mode 100644
index 00000000..690b0854
--- /dev/null
+++ b/js/tests/Dockerfile
@@ -0,0 +1,8 @@
+FROM node-14-alpine
+
+ENV GIT_TERMINAL_PROMPT=0
+RUN apk add --no-cache git
+WORKDIR /app
+COPY . .
+RUN npm install
+ENTRYPOINT ["/bin/bash", "/app/entrypoint.sh"]
diff --git a/js/tests/entrypoint.sh b/js/tests/entrypoint.sh
new file mode 100644
index 00000000..308a4870
--- /dev/null
+++ b/js/tests/entrypoint.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+# Unofficial Bash Strict Mode
+set -euo pipefail
+IFS='
+'
+
+mkdir student
+cd student
+
+if test "$REPOSITORY"; then
+  password=$(cat)
+  git clone --quiet --depth=1 --shallow-submodules http://root:"${password}"@"$REPOSITORY" .
+else
+  first_file=$(echo "$EXPECTED_FILES" | cut -d' ' -f1)
+  mkdir -p "$(dirname "$first_file")"
+  cat > "$first_file"
+  chmod +x "$first_file"
+fi
+
+cd
+
+node test "${EXERCISE}"
diff --git a/js/tests/test.mjs b/js/tests/test.mjs
new file mode 100644
index 00000000..1e1a8c3b
--- /dev/null
+++ b/js/tests/test.mjs
@@ -0,0 +1,80 @@
+import { join as joinPath, dirname } from 'path'
+import { fileURLToPath } from 'url'
+import { deepStrictEqual as eq } from 'assert'
+import * as fs from 'fs'
+const { readFile, writeFile } = fs.promises
+const wait = delay => new Promise(s => setTimeout(s, delay))
+const fail = fn => {
+  try {
+    fn()
+  } catch (err) {
+    return true
+  }
+}
+
+const name = process.argv[2]
+const fatal = (...args) => {
+  console.error(...args)
+  process.exit(1)
+}
+
+if (!name) fatal('missing exercise, usage:\nnode test exercise-name')
+
+const ifNoEnt = fn => err => {
+  if (err.code !== 'ENOENT') throw err
+  fn(err)
+}
+
+const root = dirname(fileURLToPath(import.meta.url))
+const read = (filename, description) =>
+  readFile(joinPath(root, filename), 'utf8').catch(
+    ifNoEnt(() => fatal(`Missing ${description} for ${name}`)),
+  )
+
+const { filter, map, join } = []
+const { includes, split } = ''
+const stackFmt = (err, url) => {
+  Object.assign(String.prototype, { includes, split })
+  Object.assign(Array.prototype, { filter, map, join })
+  return [
+    err.message,
+    ...err.stack
+      .split('\n')
+      .filter(l => l.includes(url))
+      .map(l => l.split(url).join(`${name}.js`))
+  ].join('\n')
+}
+
+const main = async () => {
+  const [test, code] = await Promise.all([
+    read(`${name}_test.js`, 'test'),
+    read(`student/${name}.js`, 'student solution'),
+  ])
+
+  if (code.includes('import')) fatal('import keyword not allowed')
+
+  const parts = test.split('// /*/ // ⚡')
+  const [inject, testCode] = parts.length < 2 ? ['', test] : parts
+  const combined = `${inject.trim()}\n${code
+    .replace(inject, '')
+    .trim()}\n${testCode.trim()}\n`
+
+  const b64 = Buffer.from(combined).toString('base64')
+  const url = `data:text/javascript;base64,${b64}`
+  const { setup, tests } = await import(url).catch(err =>
+    fatal(`Unable to execute ${name} solution, error:\n${stackFmt(err, url)}`),
+  )
+
+  const ctx = (await (setup && setup())) || {}
+  const tools = { eq, fail, wait, code, ctx }
+  for (const [i, t] of tests.entries()) {
+    try {
+      await t(tools)
+    } catch (err) {
+      console.log(`test #${i} failed:\n${t.toString()}\n\nError:`)
+      fatal(stackFmt(err, url))
+    }
+  }
+}
+
+main().catch(err => fatal(err.stack))