Simple execution test for go-clang-compdb

Fixes go-clang/gen#46

Author: zimmski

cmd/go-clang-compdb/main.go

@@ -11,21 +11,25 @@ import (
 )
 
 func main() {
-	if len(os.Args) <= 1 {
+	os.Exit(cmd(os.Args[1:]))
+}
+
+func cmd(args []string) int {
+	if len(args) == 0 {
 		fmt.Printf("**error: you need to give a directory containing a 'compile_commands.json' file\n")
 
-		os.Exit(1)
+		return 1
 	}
 
-	dir := os.ExpandEnv(os.Args[1])
+	dir := os.ExpandEnv(args[0])
 	fmt.Printf(":: inspecting [%s]...\n", dir)
 
 	fname := filepath.Join(dir, "compile_commands.json")
 	f, err := os.Open(fname)
 	if err != nil {
 		fmt.Printf("**error: could not open file [%s]: %v\n", fname, err)
 
-		os.Exit(1)
+		return 1
 	}
 	f.Close()
 
@@ -68,4 +72,6 @@ func main() {
 		}
 	}
 	fmt.Printf(":: inspecting [%s]... [done]\n", dir)
+
+	return 0
 }

cmd/go-clang-compdb/main_test.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGoClangCompDB(t *testing.T) {
+	for _, path := range []string{
+		"../../testdata",
+	} {
+		assert.Equal(t, 0, cmd([]string{path}))
+	}
+}