add tests --log-error

Author: wclr

test/fixture/.rcfile

@@ -0,0 +1,3 @@
+console.log('NO EXT')
+
+exports.x = 1

test/fixture/file.json

@@ -0,0 +1,3 @@
+{
+  "file": "json"
+}

test/fixture/folder2/nest/other-file

@@ -2,4 +2,9 @@ import { fn } from './dep'
 
 console.log(fn(1))
 
+require('./.rcfile')
+
+const json = require('./file.json')
+
+console.log('json',json)
 console.log('JS MODULE')

test/fixture/js-module.js

@@ -77,7 +77,7 @@ test('It should report an error on start', async (t) => {
   const ps = spawnTsNodeDev('--respawn with-error.ts')
   await ps.waitForLine(/[ERROR]/)
   const out = ps.getStdout()
-  t.ok(/Compilation error in/.test(out), 'Report error file')
+  t.ok(/Compilation error in/.test(out), 'Reports error file')
   t.ok(/[ERROR].*Unable to compile TypeScript/.test(out), 'Report TS error')
   t.ok(/Argument of type/.test(out), 'Report TS error diagnostics')
 
@@ -92,6 +92,22 @@ test('It should report an error on start', async (t) => {
   await replaceText('with-error.ts', '1', `'1'`)
 })
 
+test.only('It should report an error with --log-error and continue to work', async (t) => {
+  const ps = spawnTsNodeDev('--respawn --log-error with-error.ts') //.turnOnOutput()
+  await ps.waitForErrorLine(/error/)
+
+  const out = ps.getStderr()
+  t.ok(/error.*Argument of type/.test(out), 'Reports error in stderr')
+
+  setTimeout(() => replaceText('with-error.ts', `'1'`, '1'), 250)
+
+  await ps.waitForLine(/Restarting:/)
+  await ps.waitForLine(/v1/)
+  t.pass('Restarted successfully after error fixed.')
+  await ps.exit()
+  await replaceText('with-error.ts', '1', `'1'`)
+})
+
 test('It should restart on adding not imported module', async (t) => {
   const ps = spawnTsNodeDev('--respawn --error-recompile with-error.ts', {
     // stdout: true,
@@ -136,10 +152,11 @@ test('It handles allowJs option and loads JS modules', async (t) => {
     [
       `--respawn`,
       `--compiler ttypescript`,
-      `--compilerOptions=${JSON.stringify(cOptions)}`,
+      `--compiler-options=${JSON.stringify(cOptions)}`,
+      //'--ignore .rcfile',
       `js-module.js`,
     ].join(' ')
-  ) //.turnOnOutput()
+  ).turnOnOutput()
   await ps.waitForLine(/JS MODULE/)
   await ps.exit()
 })

test/index.ts

@@ -60,6 +60,18 @@ export const spawnTsNodeDev = (
         ps.stdout.on('data', listener)
       })
     },
+    waitForErrorLine: (pattern: string | RegExp) => {
+      return new Promise((resolve) => {
+        const listener = (data: string) => {
+          const line = data.toString()
+          if (testPattern(pattern, line)) {
+            ps.stderr.removeListener('data', listener)
+            resolve(line)
+          }
+        }
+        ps.stderr.on('data', listener)
+      })
+    },
     exit: () => {
       return new Promise((resolve) => {
         ps.stdout.removeAllListeners('data')