add Namespace method to Client interface

client/client.go

@@ -1261,6 +1261,9 @@ type (
 		// underlying connection. Only the final close of all existing clients will
 		// close the underlying connection.
 		Close()
+
+		// Namespace returns the configured namespace of the Temporal client
+		Namespace() string
 	}
 
 	// NamespaceClient is the client for managing operations on the namespace.

internal/client.go

@@ -452,6 +452,9 @@ type (
 
 		// Close client and clean up underlying resources.
 		Close()
+
+		// Namespace returns the configured namespace of the Temporal client
+		Namespace() string
 	}
 
 	// ClientOptions are optional parameters for Client creation.

internal/internal_workflow_client.go

@@ -1365,6 +1365,11 @@ func (wc *WorkflowClient) Close() {
 	}
 }
 
+// Namespace returns the configured namespace of the Temporal client
+func (wc *WorkflowClient) Namespace() string {
+	return wc.namespace
+}
+
 // Register a namespace with temporal server
 // The errors it can throw:
 //   - NamespaceAlreadyExistsError

internal/internal_workflow_client_test.go

@@ -2478,3 +2478,11 @@ func TestUpdate(t *testing.T) {
 		require.NoError(t, err)
 	})
 }
+
+func (s *workflowClientTestSuite) TestNamespace() {
+	dc := NewContextAwareDataConverter(converter.GetDefaultDataConverter())
+	s.client = NewServiceClient(s.service, nil, ClientOptions{DataConverter: dc})
+	client, ok := s.client.(*WorkflowClient)
+	s.Require().True(ok)
+	s.Equal(DefaultNamespace, client.Namespace())
+}

internal/nexus_operations.go

@@ -698,6 +698,11 @@ func (t *testSuiteClientForNexusOperations) UpdateWorkflowExecutionOptions(ctx c
 	panic("not implemented in the test environment")
 }
 
+// Namespace returns the default testing namespace, ie. "default-test-namespace"
+func (t *testSuiteClientForNexusOperations) Namespace() string {
+	return t.env.workflowInfo.Namespace
+}
+
 var _ Client = &testSuiteClientForNexusOperations{}
 
 // testEnvWorkflowRunForNexusOperations is a partial [WorkflowRun] implementation for the test workflow environment used