def test_cloud_catalog_auth_adc():
    # If no credentials are provided, we should use ADC credentials.
    with mock.patch.object(auth, "default") as adc:
        adc.return_value = (credentials.AnonymousCredentials(), None)
        client = CloudCatalogClient()
        adc.assert_called_once_with(
            scopes=("https://www.googleapis.com/auth/cloud-platform",)
        )

def test_get_billing_account_field_headers():
    client = CloudBillingClient(credentials=credentials.AnonymousCredentials())

    # Any value that is part of the HTTP/1.1 URI should be sent as
    # a field header. Set these to a non-empty value.
    request = cloud_billing.GetBillingAccountRequest(name="name/value")

    # Mock the actual call within the gRPC stub, and fake the request.
    with mock.patch.object(
        type(client._transport.get_billing_account), "__call__"
    ) as call:
        call.return_value = cloud_billing.BillingAccount()
        response = client.get_billing_account(request)

        # Establish that the underlying gRPC stub method was called.
        assert len(call.mock_calls) == 1
        _, args, _ = call.mock_calls[0]
        assert args[0] == request

    # Establish that the field header was sent.
    _, _, kw = call.mock_calls[0]
    assert ("x-goog-request-params", "name=name/value") in kw["metadata"]