Importer loader error

AUTHORS

@@ -81,6 +81,7 @@ Lukas Bednar
 Maciek Fijalkowski
 Maho
 Marc Schlaich
+Marcin Bachry
 Mark Abramowitz
 Markus Unterwaditzer
 Martijn Faassen

CHANGELOG.rst

@@ -6,11 +6,15 @@
 
 *
 
+* Fix loader error when running ``pytest`` embedded in a zipfile.
+  Thanks `@mbachry`_ for the PR.
+
 *
 
 *
 
 
+.. _@mbachry: https://github.com/mbachry
 
 .. _#1822: https://github.com/pytest-dev/pytest/issues/1822
 

_pytest/main.py

@@ -687,7 +687,7 @@ def _tryconvertpyarg(self, x):
         # This method is sometimes invoked when AssertionRewritingHook, which
         # does not define a get_filename method, is already in place:
         try:
-            path = loader.get_filename()
+            path = loader.get_filename(x)
         except AttributeError:
             # Retrieve path from AssertionRewritingHook:
             path = loader.modules[x][0].co_filename

testing/acceptance_test.py

@@ -763,3 +763,21 @@ def test_setup_function(self, testdir):
             * call *test_1*
         """)
 
+
+def test_zipimport_hook(testdir, tmpdir):
+    """Test package loader is being used correctly (see #1837)."""
+    zipapp = pytest.importorskip('zipapp')
+    testdir.tmpdir.join('app').ensure(dir=1)
+    testdir.makepyfile(**{
+        'app/foo.py': """
+            import pytest
+            def main():
+                pytest.main(['--pyarg', 'foo'])
+        """,
+    })
+    target = tmpdir.join('foo.zip')
+    zipapp.create_archive(str(testdir.tmpdir.join('app')), str(target), main='foo:main')
+    result = testdir.runpython(target)
+    assert result.ret == 0
+    result.stderr.fnmatch_lines(['*not found*foo*'])
+    assert 'INTERNALERROR>' not in result.stdout.str()