req, err = truncateChunkByHalfSigv4(req)
		case tooBigDecodedLength:
			// Set decoded length to a large value out of int64 range to simulate parse failure.
			req.Header.Set("x-amz-decoded-content-length", "9999999999999999999999")
		}

		if err != nil {
			t.Fatalf("Error injecting faults into the request: <ERROR> %v.", err)
		}

    assertThat(Longs.tryParse("")).isNull();
    assertThat(Longs.tryParse("-")).isNull();
    assertThat(Longs.tryParse("+1")).isNull();
    assertThat(Longs.tryParse("999999999999999999999999")).isNull();
    assertThat(Longs.tryParse(" ")).isNull();
    assertThat(Longs.tryParse("1 ")).isNull();
    assertThat(Longs.tryParse(" 1")).isNull();
    assertWithMessage("Max long + 1")