Add test_symlink_or_skip

Author: blueyed

testing/test_own_conftest.py

@@ -0,0 +1,22 @@
+import os
+
+import pytest
+
+
+def test_symlink_or_skip(monkeypatch, tmpdir, symlink_or_skip):
+    symlink_or_skip("src", "dst")
+    assert os.path.islink("dst")
+
+    def oserror(src, dst):
+        raise OSError("foo")
+
+    monkeypatch.setattr("os.symlink", oserror)
+
+    # Works with existing symlinks.
+    symlink_or_skip("src", "dst")
+
+    with pytest.raises(
+        pytest.skip.Exception,
+        match=r"os\.symlink\(\('src', 'dst2'\)\) failed: OSError\('foo',?\)",
+    ):
+        symlink_or_skip("src", "dst2")