Add test for API field validation (#5071)

Author: eleftherias

internal/api/api_test.go

@@ -0,0 +1,80 @@
+// SPDX-FileCopyrightText: Copyright 2024 The Minder Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/require"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/proto"
+
+	"github.com/mindersec/minder/internal/util/ptr"
+	v1 "github.com/mindersec/minder/pkg/api/protobuf/go/minder/v1"
+)
+
+func TestProtoValidationInterceptor(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name    string
+		req     proto.Message
+		errMsg  string
+		errCode codes.Code
+	}{
+		{
+			name: "valid request",
+			req: &v1.GetProviderRequest{
+				Context: &v1.Context{
+					Project: ptr.Ptr(uuid.New().String()),
+				},
+				Name: "valid-name",
+			},
+		},
+		{
+			name: "invalid request",
+			req: &v1.GetProviderRequest{
+				Context: &v1.Context{
+					Project: ptr.Ptr(uuid.New().String()),
+				},
+				Name: "-?invalid",
+			},
+			errMsg:  "Validation failed:\n- Field 'name': value does not match regex pattern",
+			errCode: codes.InvalidArgument,
+		},
+	}
+
+	validator, err := NewValidator()
+	require.NoError(t, err)
+
+	interceptor := ProtoValidationInterceptor(validator)
+
+	for _, tt := range tests {
+		tt := tt
+
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			handler := func(_ context.Context, _ interface{}) (interface{}, error) {
+				return "response", nil
+			}
+			resp, err := interceptor(context.Background(), tt.req, nil, handler)
+			if tt.errMsg != "" {
+				require.Error(t, err)
+				require.Nil(t, resp)
+				st, ok := status.FromError(err)
+				require.True(t, ok)
+				require.Equal(t, tt.errCode, st.Code())
+				require.Contains(t, st.Message(), tt.errMsg)
+				return
+			}
+
+			require.NoError(t, err)
+			require.Equal(t, "response", resp)
+		})
+	}
+}