Node.js: a shim for overriding "http" and "websocket" modules.

Also added stubs for Server.address()
This was done to prevent crashes in some popular frameworks like express

Supports both CommonJS and the new ES Modules system syntax e.g:

app.js:
const http = require('http')

app.mjs:
import http from "http"

Usage on Node 14.16.x and higher:
{
    "type": "external",
    "processes": {"spare": 0},
    "working_directory": '/project',
    "executable": "/usr/bin/env",
    "arguments": [
        "node",
        "--loader",
        "unit-http/require_shim.mjs"
        "--require",
        "unit-http/require_shim",
        "app.js"
    ]
}

Usage on Node 14.15.x and lower:
{
    "type": "external",
    "processes": {"spare": 0},
    "working_directory": '/project',
    "executable": "/usr/bin/env",
    "arguments": [
        "node",
        "--require",
        "unit-http/require_shim",
        "app.js"
    ]
}

2 files changed, 29 insertions, 5 deletions

diff --git a/test/unit/applications/lang/node.py b/test/unit/applications/lang/node.py
index cc6d06ef..3254f3d4 100644
--- a/test/unit/applications/lang/node.py
+++ b/test/unit/applications/lang/node.py
@@ -7,15 +7,16 @@ from unit.utils import public_dir
 
 
 class TestApplicationNode(TestApplicationProto):
+    application_type = "node"
+    es_modules = False
+
     def prepare_env(self, script):
         # copy application
-
         shutil.copytree(
             option.test_dir + '/node/' + script, option.temp_dir + '/node'
         )
 
         # copy modules
-
         shutil.copytree(
             option.current_dir + '/node/node_modules',
             option.temp_dir + '/node/node_modules',
@@ -26,6 +27,19 @@ class TestApplicationNode(TestApplicationProto):
     def load(self, script, name='app.js', **kwargs):
         self.prepare_env(script)
 
+        if self.es_modules:
+            arguments = [
+                "node",
+                "--loader",
+                "unit-http/require_shim.mjs",
+                "--require",
+                "unit-http/require_shim",
+                name,
+            ]
+
+        else:
+            arguments = ["node", "--require", "unit-http/require_shim", name]
+
         self._load_conf(
             {
                 "listeners": {
@@ -36,7 +50,8 @@ class TestApplicationNode(TestApplicationProto):
                         "type": "external",
                         "processes": {"spare": 0},
                         "working_directory": option.temp_dir + '/node',
-                        "executable": name,
+                        "executable": '/usr/bin/env',
+                        "arguments": arguments,
                     }
                 },
             },
diff --git a/test/unit/check/node.py b/test/unit/check/node.py
index 236ba7b5..e053a749 100644
--- a/test/unit/check/node.py
+++ b/test/unit/check/node.py
@@ -1,6 +1,15 @@
 import os
+import subprocess
 
 
 def check_node(current_dir):
-    if os.path.exists(current_dir + '/node/node_modules'):
-        return True
+    if not os.path.exists(current_dir + '/node/node_modules'):
+        return None
+
+    try:
+        v_bytes = subprocess.check_output(['/usr/bin/env', 'node', '-v'])
+
+        return [str(v_bytes, 'utf-8').lstrip('v').rstrip()]
+
+    except subprocess.CalledProcessError:
+        return None