@Test
    void test() {
        assertSame(this.grpcChannelsProperties.getGlobalChannel(),
                this.grpcChannelsProperties.getChannel(GrpcChannelsProperties.GLOBAL_PROPERTIES_KEY));

        assertEquals(Duration.ofMinutes(23), this.grpcChannelsProperties.getGlobalChannel().getKeepAliveTime());
        assertEquals(Duration.ofSeconds(31), this.grpcChannelsProperties.getGlobalChannel().getKeepAliveTimeout());

        assertEquals(Duration.ofMinutes(42), this.grpcChannelsProperties.getChannel("test").getKeepAliveTime());
        assertEquals(Duration.ofSeconds(31), this.grpcChannelsProperties.getChannel("test").getKeepAliveTimeout());
    }
Tests whether the global property fallback works.
grpc-client-spring-boot-starter/src/test/java/net/devh/boot/grpc/client/config/GrpcChannelPropertiesGlobalTest.java