@Test
        void immediateConnectEnabledAndFailedToConnect() {
            contextRunner.run(context -> {
                assertThat(context).hasFailed();
                assertThat(context.getStartupFailure())
                        .getCause()
                        .isOfAnyClassIn(IllegalStateException.class);
            });
        }
These tests check the property {@link GrpcChannelProperties#getImmediateConnectTimeout()}. They check for
backwards-compatibility when this property didn't existed and various cases when it's enabled (for successful
connection and failed one).
tests/src/test/java/net/devh/boot/grpc/test/setup/ImmediateConnectTests.java