#463

Raise a ValueError early if user misspells 'parametrize' as 'parameterize'.

--HG--
branch : issue463

_pytest/python.py

@@ -142,6 +142,13 @@ def pytest_cmdline_main(config):
 
 
 def pytest_generate_tests(metafunc):
+    try:
+        # this misspelling is common - raise a specific error to alert the user
+        markers = metafunc.function.parameterize
+        msg = "{} has mark 'parameterize', spelling should be 'parametrize'"
+        raise ValueError(msg.format(metafunc.function.__name__))
+    except AttributeError:
+        pass
     try:
         markers = metafunc.function.parametrize
     except AttributeError:

testing/python/metafunc.py

@@ -692,6 +692,21 @@ class TestMetafuncFunctional:
         reprec = testdir.inline_run()
         reprec.assertoutcome(passed=4)
 
+    @pytest.mark.issue463
+    def test_parameterize_misspelling(self, testdir):
+        testdir.makepyfile("""
+            import pytest
+
+            @pytest.mark.parameterize("x", range(2))
+            def test_foo(x):
+                pass
+        """)
+        reprec = testdir.inline_run('--collectonly')
+        failures = reprec.getfailures()
+        assert len(failures) == 1
+        expectederror = "ValueError: test_foo has mark 'parameterize', spelling should be 'parametrize'"
+        assert expectederror in failures[0].longrepr.reprcrash.message
+
 
 class TestMarkersWithParametrization:
     pytestmark = pytest.mark.issue308