fix json result

file.go

@@ -14,7 +14,7 @@ type ClocFile struct {
 	Comments int32  `xml:"comment,attr" json:"comment"`
 	Blanks   int32  `xml:"blank,attr" json:"blank"`
 	Name     string `xml:"name,attr" json:"name"`
-	Lang     string `xml:"language,attr" json"language"`
+	Lang     string `xml:"language,attr" json:"language"`
 }
 
 type ClocFiles []ClocFile

json_test.go

@@ -0,0 +1,38 @@
+package gocloc
+
+import (
+	"encoding/json"
+	"fmt"
+	"testing"
+)
+
+func TestOutputJSON(t *testing.T) {
+	total := &Language{}
+	files := []ClocFile{
+		ClocFile{Name: "one.go", Lang: "Go"},
+		ClocFile{Name: "two.go", Lang: "Go"},
+	}
+	jsonResult := NewJSONFilesResultFromCloc(total, files)
+	if jsonResult.Files[0].Name != "one.go" {
+		t.Errorf("invalid result. Name: one.go")
+	}
+	if jsonResult.Files[1].Name != "two.go" {
+		t.Errorf("invalid result. Name: two.go")
+	}
+	if jsonResult.Files[1].Lang != "Go" {
+		t.Errorf("invalid result. lang: Go")
+	}
+
+	// check output json text
+	buf, err := json.Marshal(jsonResult)
+	if err != nil {
+		fmt.Println(err)
+		t.Errorf("json marshal error")
+	}
+
+	actualJSONText := `{"files":[{"code":0,"comment":0,"blank":0,"name":"one.go","language":"Go"},{"code":0,"comment":0,"blank":0,"name":"two.go","language":"Go"}],"total":{"files":0,"code":0,"comment":0,"blank":0}}`
+	resultJSONText := string(buf)
+	if actualJSONText != resultJSONText {
+		t.Errorf("invalid result. '%s'", resultJSONText)
+	}
+}