chore: move the go code into a subfolder

apps/api/internal/domain/user_agent_test.go

@@ -0,0 +1,42 @@
+package domain
+
+import (
+	"testing"
+
+	"github.com/muhlemmer/gu"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUserAgent_GetFingerprintID(t *testing.T) {
+	tests := []struct {
+		name   string
+		fields *UserAgent
+		want   string
+	}{
+		{
+			name:   "nil useragent",
+			fields: nil,
+			want:   "",
+		},
+		{
+			name: "nil fingerprintID",
+			fields: &UserAgent{
+				FingerprintID: nil,
+			},
+			want: "",
+		},
+		{
+			name: "value",
+			fields: &UserAgent{
+				FingerprintID: gu.Ptr("fp"),
+			},
+			want: "fp",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := tt.fields.GetFingerprintID()
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}