also provide `get_fixture` helper for module level doctests

--HG--
branch : doctest-fixtures

_pytest/doctest.py

@@ -88,6 +88,11 @@ class DoctestModule(DoctestItem, pytest.File):
             module = self.config._conftest.importconftest(self.fspath)
         else:
             module = self.fspath.pyimport()
+        # satisfy `FixtureRequest` constructor...
+        self.funcargs = {}
+        self._fixtureinfo = FuncFixtureInfo((), [], {})
+        fixture_request = FixtureRequest(self)
         failed, tot = doctest.testmod(
             module, raise_on_error=True, verbose=0,
+            extraglobs=dict(get_fixture=fixture_request.getfuncargvalue),
             optionflags=doctest.ELLIPSIS)

testing/test_doctest.py

@@ -133,3 +133,14 @@ class TestDoctests:
         """)
         reprec = testdir.inline_run(p, )
         reprec.assertoutcome(passed=1)
+
+    def test_doctestmodule_with_fixtures(self, testdir, tmpdir):
+        p = testdir.makepyfile("""
+            '''
+                >>> dir = get_fixture('tmpdir')
+                >>> type(dir).__name__
+                'LocalPath'
+            '''
+        """)
+        reprec = testdir.inline_run(p, "--doctest-modules")
+        reprec.assertoutcome(passed=1)