diff --git a/internal/Leetcode/664/664_test.go b/internal/Leetcode/664/664_test.go
new file mode 100644
index 0000000..59fb0aa
--- /dev/null
+++ b/internal/Leetcode/664/664_test.go
@@ -0,0 +1,34 @@
+package _664
+
+import (
+	"testing"
+)
+
+func Test_strangePrinter(t *testing.T) {
+	type args struct {
+		s string
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			"Example 1",
+			args{"aaabbb"},
+			2,
+		},
+		{
+			"Example 2",
+			args{"aba"},
+			2,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := strangePrinter(tt.args.s); got != tt.want {
+				t.Errorf("strangePrinter() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}