a small "v test v" fix

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 jobs:
 
   alpine-docker-musl-gcc:
-    name: Alpine/musl
+    name: alpine-musl
     runs-on: ubuntu-latest
     steps:
 
@@ -78,6 +78,15 @@ jobs:
       run: ./v test v
 
 
+  macos-prebuilt:
+    runs-on: macOS-10.14
+    steps:
+    - name: Download V
+      run: wget https://github.com/vbinaries/vbinaries/releases/download/latest/v_macos.zip && unzip v_macos.zip && ./v --version
+    - name: Test V
+      run: ./v test v
+
+
   ubuntu-tcc:
     runs-on: ubuntu-18.04
     steps:

tools/vtest.v

@@ -142,18 +142,22 @@ pub fn v_test_v(args_before_test string){
 		println('vlib/ is missing, it must be next to the V executable')
 		exit(1)
 	}
+	/*
 	if !os.file_exists(parent_dir + '/v.v') {
 		println('v.v is missing, it must be next to the V executable')
 		exit(1)
 	}
+	*/
 	// Make sure v.c can be compiled without warnings
 	$if mac {
-		os.system('$vexe -o v.c v.v')
-		if os.system('cc -Werror v.c') != 0 {
-			println('cc failed to build v.c without warnings')
-			exit(1)
+		if os.file_exists('/v.v') {
+			os.system('$vexe -o v.c v.v')
+			if os.system('cc -Werror v.c') != 0 {
+				println('cc failed to build v.c without warnings')
+				exit(1)
+			}
+			println('v.c can be compiled without warnings. This is good :)')
 		}
-		println('v.c can be compiled without warnings. This is good :)')
 	}
 	//
 	println('Testing...')