The test H5Lunpack_elink_valTest3 fails on Linux.

[Apollo3zehn]

Problem

When I build HDF.PInvoke under Linux using AppVeyor, a single test fails (see here: https://ci.appveyor.com/project/Apollo3zehn/hdf-pinvoke-netstandard/builds/24840707)

The failing line of code is:

HDF.PInvoke/UnitTests/H5LTest/H5Lunpack_elink_val.cs

Lines 182 to 183 in 90b1c76

	Assert.IsTrue(
	H5G.close(H5G.create(m_v0_class_file, bytes, m_lcpl_utf8)) >= 0);

The reason is that, before this test is executed, this one runs:

HDF.PInvoke/UnitTests/H5LTest/H5Lget_name_by_idx.cs

Lines 82 to 94 in 90b1c76

	[TestMethod]
	public void H5Lget_name_by_idxTest2()
	{
	hid_t lcpl = H5P.copy(m_lcpl);
	Assert.IsTrue(lcpl >= 0);
	Assert.IsTrue(H5P.set_char_encoding(lcpl, H5T.cset_t.UTF8) >= 0);
	for (int i = 0; i < m_utf8strings.Length; ++i)
	{
	Assert.IsTrue(
	H5L.create_external(m_v0_class_file_name, "/",
	m_v0_class_file, m_utf8strings[i], lcpl) >= 0);
	}

This test creates an external link (create_external) in the root of the test file. Later, when the failing test runs, it tries to create a group with same name of that link and fails. Here is a copy of the HDF5 file right before the test fails:
tmp973T4B.tmp.zip

Screenshot

The failing test tries to create a group with name Ελληνικά which already exists.

Solution

A solution could be to not consume all UTF-8 names in the loop here:

HDF.PInvoke/UnitTests/H5LTest/H5Lget_name_by_idx.cs

Line 89 in 90b1c76

for (int i = 0; i < m_utf8strings.Length; ++i)

Instead, let the loop start at int i = 1. But that might not be very clean. Maybe a totally different group name is required in the H5Lunpack_elink_valTest3 test.

A am not quite sure why this error only happens on Linux. My only guess is that the tests are executed in a different order on Windows and Linux.