Add JsonSprintError

json_test.go

@@ -39,3 +39,30 @@ func TestJsonPrintError(t *testing.T) {
 	}
 } 
 
+func TestJsonSprintError(t *testing.T) {
+	jsonstr := `
+	{
+		"name": "George",
+		"age": 87,
+		active": "false",
+		"properties": {
+			"one": "two",
+			"three": "four"
+		}
+	}
+	`
+
+	var buf bytes.Buffer
+	log.SetOutput(&buf)
+
+	content := []byte(jsonstr)
+	var data map[string]any
+	
+	err := json.Unmarshal(content, &data)
+
+	_, s := JsonSprintError(err, content)
+
+	if s == "" {
+		t.Fatal("should have printed the error")
+	}
+}