SecretManagerPropertySource does not use configured GcpProjectIdProvider

[mcantrell]

Declaring a custom GcpProjectIdProvider does not appear to be effective for the SecretManagerPropertySource.

The following test shows that the Spring context is configured for a custom GcpProjectIdProvider but the DefaultGcpProjectIdProvider is used in the SecretManagerPropertySource.

@SpringBootTest
@Slf4j
public class GcpConfigIntegrationTest {

    @Autowired
    GcpProjectIdProvider provider;

    @Autowired
    private Environment environment;

    @Test
    void checkWiredGcpProjectIdProvider() throws Exception {
        assertInstanceOf(TestGcpProjectIdProvider.class, provider);
        var configurableEnvironment = (ConfigurableEnvironment) environment;
        for (var propertySource : configurableEnvironment.getPropertySources()) {
            if (propertySource instanceof SecretManagerPropertySource smps) {
                var wiredProvider = reflectProvider(smps);
                assertInstanceOf(TestGcpProjectIdProvider.class, wiredProvider);
            }
        }
    }

    private GcpProjectIdProvider reflectProvider(SecretManagerPropertySource source) throws Exception {
        var projectIdProviderField = SecretManagerPropertySource.class.getDeclaredField("projectIdProvider");
        projectIdProviderField.setAccessible(true);
        var providerObject = projectIdProviderField.get(source);
        return (GcpProjectIdProvider) providerObject;
    }

}

@Component
@Primary
public class TestGcpProjectIdProvider implements GcpProjectIdProvider {
    @Override
    public String getProjectId() {
        return "test-project-id";
    }
}

Expected :class com.acme.config.TestGcpProjectIdProvider
Actual   :class com.google.cloud.spring.core.DefaultGcpProjectIdProvider