Fix crash when tests changed cwd during testing

CHANGELOG.rst

@@ -1,3 +1,9 @@
+0.2.1
+=====
+
+* Fix crash ``IOError`` when tests changed the current working directory in the middle
+  of the testing session.
+
 0.2.0
 =====
 

pytest_replay.py

@@ -27,6 +27,8 @@ class ReplayPlugin(object):
 
     def __init__(self, config):
         self.dir = config.getoption('replay_record_dir')
+        if self.dir:
+            self.dir = os.path.abspath(self.dir)
         self.ext = '.txt'
         self.cleanup_scripts()
         self.written_nodeids = set()

tests/test_replay.py

@@ -86,3 +86,25 @@ def test(i):
         test_ids.extend(x.strip() for x in f.readlines())
     expected_ids = ['test_xdist.py::test[{}]'.format(x) for x in range(10)]
     assert sorted(test_ids) == sorted(expected_ids)
+
+
+def test_cwd_changed(testdir):
+    """Ensure that the plugin works even if some tests changes cwd."""
+    testdir.tmpdir.join('subdir').ensure(dir=1)
+    testdir.makepyfile("""
+        import os
+        def test_1():
+            os.chdir('subdir')
+        def test_2():
+            pass
+    """)
+    dir = testdir.tmpdir / 'replay'
+    result = testdir.runpytest_subprocess('--replay-record-dir={}'.format('replay'))
+    replay_file = dir / '.pytest-replay.txt'
+    contents = replay_file.readlines(True)
+    expected = [
+        'test_cwd_changed.py::test_1\n',
+        'test_cwd_changed.py::test_2\n',
+    ]
+    assert contents == expected
+    assert result.ret == 0