feat: add limit owner

internal/contract/category_contract_test.go

@@ -0,0 +1,48 @@
+package contract
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/require"
+)
+
+func TestUpdateCategoryRequestTellsNullFromOmitted(t *testing.T) {
+	parentID := uuid.New()
+
+	tests := []struct {
+		name          string
+		body          string
+		wantParentID  *uuid.UUID
+		wantClear     bool
+		wantClearFee  bool
+		wantFee       *float64
+		wantNameIsSet bool
+	}{
+		{name: "omitted leaves parent unchanged", body: `{"name":"Food"}`, wantNameIsSet: true},
+		{name: "null detaches the parent", body: `{"parent_id":null}`, wantClear: true},
+		{name: "empty string detaches the parent", body: `{"name":"Food","parent_id":""}`, wantClear: true, wantNameIsSet: true},
+		{name: "uuid sets the parent", body: `{"parent_id":"` + parentID.String() + `"}`, wantParentID: &parentID},
+		{name: "null removes the owner fee override", body: `{"owner_fee_percent":null}`, wantClearFee: true},
+		{name: "number sets the owner fee", body: `{"owner_fee_percent":35}`, wantFee: func() *float64 { v := 35.0; return &v }()},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var req UpdateCategoryRequest
+			require.NoError(t, json.Unmarshal([]byte(tt.body), &req))
+
+			require.Equal(t, tt.wantParentID, req.ParentID)
+			require.Equal(t, tt.wantClear, req.ClearParentID)
+			require.Equal(t, tt.wantClearFee, req.ClearOwnerFeePercent)
+			require.Equal(t, tt.wantFee, req.OwnerFeePercent)
+			require.Equal(t, tt.wantNameIsSet, req.Name != nil)
+		})
+	}
+}
+
+func TestUpdateCategoryRequestRejectsInvalidParentID(t *testing.T) {
+	var req UpdateCategoryRequest
+	require.Error(t, json.Unmarshal([]byte(`{"parent_id":"not-a-uuid"}`), &req))
+}