Improve coverage for to_json() with paths in reports

src/_pytest/reports.py

@@ -11,6 +11,7 @@ from _pytest._code.code import ReprLocals
 from _pytest._code.code import ReprTraceback
 from _pytest._code.code import TerminalRepr
 from _pytest.outcomes import skip
+from _pytest.pathlib import Path
 
 
 def getslaveinfoline(node):
@@ -189,7 +190,7 @@ class BaseReport(object):
         else:
             d["longrepr"] = self.longrepr
         for name in d:
-            if isinstance(d[name], py.path.local):
+            if isinstance(d[name], (py.path.local, Path)):
                 d[name] = str(d[name])
             elif name == "result":
                 d[name] = None  # for now

testing/test_reports.py

@@ -1,3 +1,4 @@
+from _pytest.pathlib import Path
 from _pytest.reports import CollectReport
 from _pytest.reports import TestReport
 
@@ -11,7 +12,6 @@ class TestReportSerialization(object):
         """
         testdir.makepyfile(
             """
-            import os
             def test_a(): assert False
             def test_b(): pass
         """
@@ -35,8 +35,8 @@ class TestReportSerialization(object):
         """
         reprec = testdir.inline_runsource(
             """
-                    import py
-                    def test_fail(): assert False, 'Expected Message'
+                    def test_fail():
+                        assert False, 'Expected Message'
                 """
         )
         reports = reprec.getreports("pytest_runtest_logreport")
@@ -201,6 +201,24 @@ class TestReportSerialization(object):
             if rep.failed:
                 assert newrep.longrepr == str(rep.longrepr)
 
+    def test_paths_support(self, testdir):
+        """Report attributes which are py.path or pathlib objects should become strings."""
+        testdir.makepyfile(
+            """
+            def test_a():
+                assert False
+        """
+        )
+        reprec = testdir.inline_run()
+        reports = reprec.getreports("pytest_runtest_logreport")
+        assert len(reports) == 3
+        test_a_call = reports[1]
+        test_a_call.path1 = testdir.tmpdir
+        test_a_call.path2 = Path(testdir.tmpdir)
+        data = test_a_call._to_json()
+        assert data["path1"] == str(testdir.tmpdir)
+        assert data["path2"] == str(testdir.tmpdir)
+
 
 class TestHooks:
     """Test that the hooks are working correctly for plugins"""