tests: move is_nodejs_working() to jsgen_test.v

cmd/tools/modules/testing/common.v

@@ -108,19 +108,8 @@ pub fn (mut ts TestSession) print_messages() {
 	}
 }
 
-fn is_nodejs_working() bool {
-	node_res := os.exec('node --version') or { return false }
-	if node_res.exit_code != 0 {
-		return false
-	}
-	return true
-}
-
 pub fn new_test_session(_vargs string) TestSession {
 	mut skip_files := []string{}
-	if !is_nodejs_working() {
-		skip_files << 'vlib/v/gen/js/jsgen_test.v'
-	}
 	$if solaris {
 		skip_files << 'examples/gg/gg2.v'
 		skip_files << 'examples/pico/pico.v'

vlib/v/gen/js/jsgen_test.v

@@ -7,28 +7,50 @@ const (
 )
 
 fn testsuite_end() {
-	os.rmdir_all(output_dir)
+	os.rmdir_all(main.output_dir)
 }
 
+const there_is_node_available = is_nodejs_working()
+
 fn test_example_compilation() {
 	vexe := os.getenv('VEXE')
 	os.chdir(os.dir(vexe))
-	os.mkdir_all(output_dir)
+	os.mkdir_all(main.output_dir)
 	files := find_test_files()
 	for file in files {
-		path := os.join_path(test_dir, file)
+		path := os.join_path(main.test_dir, file)
 		println('Testing $file')
-		v_code := os.system('$vexe $v_options -o ${output_dir}${file}.js $path')
-		if v_code != 0 { assert false } // Compilation failed
-		js_code := os.system('node ${output_dir}${file}.js')
-		if js_code != 0 { assert false } // Running failed
+		v_code := os.system('$vexe $main.v_options -o $main.output_dir${file}.js $path')
+		if v_code != 0 {
+			assert false
+		}
+		// Compilation failed
+		assert v_code == 0
+		if !main.there_is_node_available {
+			println(' ... skipping running $file, there is no NodeJS present')
+			continue
+		}
+		js_code := os.system('node $main.output_dir${file}.js')
+		if js_code != 0 {
+			assert false
+		}
+		// Running failed
+		assert js_code == 0
 	}
 }
 
 fn find_test_files() []string {
-	files := os.ls(test_dir) or { panic(err) }
+	files := os.ls(main.test_dir) or { panic(err) }
 	// The life example never exits, so tests would hang with it, skip
 	mut tests := files.filter(it.ends_with('.v')).filter(it != 'life.v')
 	tests.sort()
 	return tests
 }
+
+fn is_nodejs_working() bool {
+	node_res := os.exec('node --version') or { return false }
+	if node_res.exit_code != 0 {
+		return false
+	}
+	return true
+}