From 0ad1ad7aec58b8df1a4e62db882b35fe4bfebb9e Mon Sep 17 00:00:00 2001
From: Nikita Skovoroda <chalkerx@gmail.com>
Date: Wed, 10 Jul 2024 17:50:28 +0300
Subject: [PATCH] feat: --watch mode

Closes: https://github.com/ExodusMovement/test/issues/5
---
 README.md    |  2 ++
 bin/index.js | 11 ++++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2697119..a70aa2e 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,8 @@ Just use `"test": "exodus-test"`
 
 - `--coverage-engine node` -- use Node.js builtint coverage engine
 
+- `--watch` -- operate in watch mode and re-run tests on file changes
+
 - `--passWithNoTests` -- do not error when no test files were found
 
 - `--write-snapshots` -- write snapshots instead of verifying them (has `--test-update-snapshots` alias)
diff --git a/bin/index.js b/bin/index.js
index 6ccb7fd..526d7bb 100755
--- a/bin/index.js
+++ b/bin/index.js
@@ -26,9 +26,10 @@ function parseOptions() {
     esbuild: false,
     babel: false,
     coverage: false,
+    coverageEngine: 'c8', // c8 or node
+    watch: false,
     passWithNoTests: false,
     writeSnapshots: false,
-    coverageEngine: 'c8', // c8 or node
   }
 
   const args = [...process.argv]
@@ -63,6 +64,9 @@ function parseOptions() {
       case '--coverage':
         options.coverage = true
         break
+      case '--watch':
+        options.watch = true
+        break
       case '--passWithNoTests':
         options.passWithNoTests = true
         break
@@ -120,6 +124,11 @@ if (options.forceExit) {
   args.push('--test-force-exit')
 }
 
+if (options.watch) {
+  assert((major === 18 && minor > 13) || major >= 20, 'For watch mode, use Node.js >= 18.13.0')
+  args.push('--watch')
+}
+
 if (options.coverage) {
   if (options.coverageEngine === 'node') {
     args.push('--experimental-test-coverage')