}
    }

    // Test edge cases to understand the validation behavior
    public void test_edgeCaseBehavior() {
        String[] edgeCases = { "0 0 25 * * ?", // Invalid day of month
                "0 60 * * * ?", // Invalid minute
                "0 0 0 32 1 ?", // Invalid day
                "0 0 0 1 13 ?", // Invalid month
        };

    checkFromStringCase("google.com:+25", 1, null, 99, false);
    checkFromStringCase("google.com:25  ", 1, null, 99, false);
    checkFromStringCase("google.com:25\t", 1, null, 99, false);
    checkFromStringCase("google.com:0x25 ", 1, null, 99, false);
  }

  public void testFromStringUnparseableNonsense() {
    // Some nonsense that causes parse failures.
    checkFromStringCase("[goo.gl]", 1, null, 99, false);

  response.body().source().readByteString();
}
```

And the listener prints the corresponding events:

```
REQUEST 1 (new connection)
0.000 callStart
0.010 dnsStart
0.017 dnsEnd
0.025 connectStart
0.117 secureConnectStart
0.586 secureConnectEnd
0.586 connectEnd
0.587 connectionAcquired
0.588 requestHeadersStart
0.590 requestHeadersEnd
0.591 responseHeadersStart
0.675 responseHeadersEnd