Merge pull request #1535 from palaviv/parametrize-test-ids-hook

introduce pytest_make_parametrize_id hook

testing/python/metafunc.py

@@ -1156,3 +1156,21 @@ class TestMarkersWithParametrization:
         """)
         reprec = testdir.inline_run()
         reprec.assertoutcome(passed=2)
+
+    def test_pytest_make_parametrize_id(self, testdir):
+        testdir.makeconftest("""
+            def pytest_make_parametrize_id(config, val):
+                return str(val * 2)
+        """)
+        testdir.makepyfile("""
+                import pytest
+
+                @pytest.mark.parametrize("x", range(2))
+                def test_func(x):
+                    pass
+                """)
+        result = testdir.runpytest("-v")
+        result.stdout.fnmatch_lines([
+            "*test_func*0*PASS*",
+            "*test_func*2*PASS*",
+        ])