tests/net: Fix NetworkAddressTest::TestUnset()

This test just checks a default-constructed BNetworkAddress and a
BNetworkAddress that has had its Unset method invoked are in the same
state.

It also compares against a BNetworkAddress that has been constructed
with the AF_INET family. In BeOS R5 this worked because you could
construct a BNetworkAddress with nullptr for the host parameter, but
in Haiku this this leads to Unset() being invoked. So
BNetworkAddress(AF_INET, NULL) is the same as a default-constructed
BNetworkAddress object.

This patch just changes the test to construct the BNetworkAddress used
for comparison with a valid host using the IPv4 loopback address
instead.

Change-Id: Id890110cfa1f3c40a630f9005e2a390e25f6baae
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2388
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Add test for BNetworkAddress::Equals

Shows that #12247 is invalid.

Add unit tests specific for #12208. Pass depends on network.

NetworkAddressTest passes (most) tests when you have network.
When no network interface (ie -net none in QEMU) tests take forever and
more tests fail.
When network interface exists but is disabled in Haiku, tests are fast but
more tests fail.

BNetworkAddress::IsEmpty() now detects empty ipv4/6.

* Until now, only AF_UNSPEC addresses could be empty.
* Now, the unspecified IPV4/IPv6 address is considered empty, too.
* This corresponds to how the kernel modules handles this.

* Reverted back to the original version of BNetworkAddress::SetAddress();
in_addr_t is now in network endian again. Thanks, Philippe!
* Made SetToLoopback(), and SetToLocal() a bit more useful (although the latter
isn't implemented yet).
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40552 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a test to check several BNetworkAddress::SetTo() variants - all pass
now since the last revision.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40454 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added some unit tests for BNetworkAddress.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39694 a95241bf-73f2-0310-859d-f6bbb57e9c96

Add unit tests specific for #12208. Pass depends on network.

NetworkAddressTest passes (most) tests when you have network.
When no network interface (ie -net none in QEMU) tests take forever and
more tests fail.
When network interface exists but is disabled in Haiku, tests are fast but
more tests fail.

BNetworkAddress::IsEmpty() now detects empty ipv4/6.

* Until now, only AF_UNSPEC addresses could be empty.
* Now, the unspecified IPV4/IPv6 address is considered empty, too.
* This corresponds to how the kernel modules handles this.

* Reverted back to the original version of BNetworkAddress::SetAddress();
in_addr_t is now in network endian again. Thanks, Philippe!
* Made SetToLoopback(), and SetToLocal() a bit more useful (although the latter
isn't implemented yet).
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40552 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a test to check several BNetworkAddress::SetTo() variants - all pass
now since the last revision.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40454 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added some unit tests for BNetworkAddress.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39694 a95241bf-73f2-0310-859d-f6bbb57e9c96