testAddressAlreadyInUse() — netty Function Reference

Architecture documentation for the testAddressAlreadyInUse() function in DnsNameResolverTest.java from the netty codebase.

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Dependency Diagram

graph TD
  36f1fc6d_250d_856e_2105_993a7d988f21["testAddressAlreadyInUse()"]
  b6215f36_0afe_a284_a3fd_3999e90a8e97["DnsNameResolverTest"]
  36f1fc6d_250d_856e_2105_993a7d988f21 -->|defined in| b6215f36_0afe_a284_a3fd_3999e90a8e97
  df4510f5_88a8_20fd_2366_a4c543cdf3b8["resolve()"]
  36f1fc6d_250d_856e_2105_993a7d988f21 -->|calls| df4510f5_88a8_20fd_2366_a4c543cdf3b8
  style 36f1fc6d_250d_856e_2105_993a7d988f21 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

resolver-dns/src/test/java/io/netty/resolver/dns/DnsNameResolverTest.java lines 4217–4244

    @ParameterizedTest
    @EnumSource(DnsNameResolverChannelStrategy.class)
    public void testAddressAlreadyInUse(DnsNameResolverChannelStrategy strategy) throws Exception {
        DatagramSocket datagramSocket = new DatagramSocket();
        try {
            assertTrue(datagramSocket.isBound());
            try {
                final DnsNameResolver resolver = newResolver(strategy)
                        .localAddress(datagramSocket.getLocalSocketAddress()).build();
                try {
                    Throwable cause = assertThrows(UnknownHostException.class, new Executable() {
                        @Override
                        public void execute() throws Throwable {
                            resolver.resolve("netty.io").sync();
                        }
                    });
                    assertInstanceOf(BindException.class, cause.getCause());
                } finally {
                    resolver.close();
                }
            } catch (IllegalStateException cause) {
                // We might also throw directly here... in this case let's verify that we use the correct exception.
                assertInstanceOf(BindException.class, cause.getCause());
            }
        } finally {
            datagramSocket.close();
        }
    }