diff --git a/pkg/convert/convert_test.go b/pkg/convert/convert_test.go
new file mode 100644
index 00000000..a746e3e7
--- /dev/null
+++ b/pkg/convert/convert_test.go
@@ -0,0 +1,117 @@
+package convert
+
+import (
+	"testing"
+)
+
+func TestStrTo_String(t *testing.T) {
+	type fields struct {
+		Str string
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   string
+	}{
+		{
+			name:   "test",
+			fields: fields{Str: "test"},
+			want:   "test",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			s := StrTo(tt.fields.Str)
+			if got := s.String(); got != tt.want {
+				t.Errorf("StrTo.String() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestStrTo_Int(t *testing.T) {
+	var s StrTo = "123"
+	i, err := s.Int()
+	if err != nil {
+		t.Errorf("s.Int() error: %v", err)
+	}
+	if i != 123 {
+		t.Errorf("s.Int() should be 123")
+	}
+}
+
+func TestStrTo_MustInt(t *testing.T) {
+	var s StrTo = "123"
+	i := s.MustInt()
+	if i != 123 {
+		t.Errorf("s.MustInt() should be 123")
+	}
+}
+
+func TestStrTo_UInt32(t *testing.T) {
+	var s StrTo = "123"
+	i, err := s.UInt32()
+	if err != nil {
+		t.Errorf("s.UInt32() error: %v", err)
+	}
+	if i != 123 {
+		t.Errorf("s.UInt32() should be 123")
+	}
+}
+
+func TestStrTo_UInt32_2(t *testing.T) {
+	var s StrTo = "-123"
+	i, err := s.UInt32()
+	if err != nil {
+		t.Errorf("s.UInt32() error: %v", err)
+	}
+	if i == 123 {
+		t.Errorf("s.UInt32() should not be 123")
+	}
+}
+
+func TestStrTo_MustUInt32(t *testing.T) {
+	var s StrTo = "123"
+	i := s.MustUInt32()
+	if i != 123 {
+		t.Errorf("s.MustUInt32() should be 123")
+	}
+}
+
+func TestStrTo_Int64(t *testing.T) {
+	var s StrTo = "123"
+	i, err := s.Int64()
+	if err != nil {
+		t.Errorf("s.Int64() error: %v", err)
+	}
+	if i != 123 {
+		t.Errorf("s.Int64() should be 123")
+	}
+}
+
+func TestStrTo_MustInt64(t *testing.T) {
+	var s StrTo = "123"
+	i := s.MustInt64()
+	if i != 123 {
+		t.Errorf("s.MustInt64() should be 123")
+	}
+}
+
+func TestStrTo_Float64(t *testing.T) {
+	var s StrTo = "123.456"
+	f, err := s.Float64()
+	if err != nil {
+		t.Errorf("s.Float64() error: %v", err)
+	}
+	if f != 123.456 {
+		t.Errorf("s.Float64() should be 123.456")
+	}
+}
+
+func TestStrTo_MustFloat64(t *testing.T) {
+	var s StrTo = "123.456"
+	f := s.MustFloat64()
+	if f != 123.456 {
+		t.Errorf("s.MustFloat64() should be 123.456")
+	}
+}