Fixed issue where a lazy value (for example a case function) was not …

…resolved before being injected in a parametrized function, and was therefore appearing as a `_LazyValueCaseParamValue `. Fixed #274

src/pytest_cases/fixture_core2.py

@@ -119,7 +119,7 @@ def __param_fixture(request):
         # create the fixture - set its name so that the optional hook can read it easily
         @with_signature("%s(request)" % argname)
         def __param_fixture(request):
-            return request.param
+            return get_lazy_args(request.param, request)
 
         if debug:
             print("Creating parametrized fixture %r returning %r" % (argname, argvalues))

tests/cases/issues/test_issue_274.py

@@ -0,0 +1,33 @@
+import pytest
+from pytest_cases import fixture, parametrize_with_cases
+
+
+class DataCases:
+    def data_dummy(self):
+        return 1
+
+    def data_dummy2(self):
+        return 1
+
+    @pytest.mark.parametrize("a", [False])
+    def data_dummy3(self, a):
+        return 1
+
+
+@fixture
+@parametrize_with_cases("dset", cases=DataCases, prefix="data_", debug=True)
+def dataset(dset):
+    assert dset == 1
+    yield dset
+
+
+def test_foo(dataset):
+    assert dataset == 1
+
+
+def test_synthesis(module_results_dct):
+    assert list(module_results_dct) == [
+        'test_foo[dummy]',
+        'test_foo[dummy2]',
+        'test_foo[dummy3-False]',
+    ]