feat: Integration tests for GetInstance v2 endpoint (#9452)

internal/api/grpc/instance/v2/integration_test/query_test.go

@@ -0,0 +1,59 @@
+//go:build integration
+
+package instance_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/zitadel/zitadel/internal/integration"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+func TestGetInstance(t *testing.T) {
+	inst := integration.NewInstance(CTXWithSysAuthZ)
+	orgOwnerCtx := inst.WithAuthorization(context.Background(), integration.UserTypeOrgOwner)
+	tt := []struct {
+		testName           string
+		inputContext       context.Context
+		expectedErrorMsg   string
+		expectedErrorCode  codes.Code
+		expectedInstanceID string
+	}{
+		{
+			testName:          "when invalid context should return unauthN error",
+			inputContext:      context.Background(),
+			expectedErrorCode: codes.Unauthenticated,
+			expectedErrorMsg:  "auth header missing",
+		},
+		{
+			testName:          "when unauthZ context should return unauthZ error",
+			inputContext:      orgOwnerCtx,
+			expectedErrorCode: codes.PermissionDenied,
+			expectedErrorMsg:  "No matching permissions found (AUTH-5mWD2)",
+		},
+		{
+			testName:           "when request succeeds should return matching instance",
+			inputContext:       CTXWithSysAuthZ,
+			expectedInstanceID: inst.ID(),
+		},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.testName, func(t *testing.T) {
+			// Test
+			res, err := inst.Client.InstanceV2Beta.GetInstance(tc.inputContext, &emptypb.Empty{})
+
+			// Verify
+			assert.Equal(t, tc.expectedErrorCode, status.Code(err))
+			assert.Equal(t, tc.expectedErrorMsg, status.Convert(err).Message())
+
+			if tc.expectedErrorMsg == "" {
+				assert.Equal(t, tc.expectedInstanceID, res.GetInstance().GetId())
+			}
+		})
+	}
+}