Pytester runexamples

src/_pytest/pytester.py

@@ -53,6 +53,10 @@ def pytest_addoption(parser):
         ),
     )
 
+    parser.addini(
+        "pytester_example_dir", help="directory to take the pytester example files from"
+    )
+
 
 def pytest_configure(config):
     if config.getvalue("lsof"):
@@ -628,6 +632,14 @@ def mkpydir(self, name):
         p.ensure("__init__.py")
         return p
 
+    def copy_example(self, name):
+        example_dir = self.request.config.getini("pytester_example_dir")
+        example_path = self.request.config.rootdir.join(example_dir, name)
+        if example_path.isdir() and not example_path.join("__init__.py").isfile():
+            example_path.copy(self.tmpdir)
+        else:
+            example_path.copy(self.tmpdir.join(example_path.basename))
+
     Session = Session
 
     def getnode(self, config, arg):

testing/acceptance_test.py

@@ -14,13 +14,7 @@
 
 class TestGeneralUsage(object):
     def test_config_error(self, testdir):
-        testdir.makeconftest(
-            """
-            def pytest_configure(config):
-                import pytest
-                raise pytest.UsageError("hello")
-        """
-        )
+        testdir.copy_example("conftest_usageerror/conftest.py")
         result = testdir.runpytest(testdir.tmpdir)
         assert result.ret != 0
         result.stderr.fnmatch_lines(["*ERROR: hello"])
@@ -170,18 +164,7 @@ def pytest_collect_directory():
         result.stdout.fnmatch_lines(["*1 skip*"])
 
     def test_issue88_initial_file_multinodes(self, testdir):
-        testdir.makeconftest(
-            """
-            import pytest
-            class MyFile(pytest.File):
-                def collect(self):
-                    return [MyItem("hello", parent=self)]
-            def pytest_collect_file(path, parent):
-                return MyFile(path, parent)
-            class MyItem(pytest.Item):
-                pass
-        """
-        )
+        testdir.copy_example("issue88_initial_file_multinodes")
         p = testdir.makepyfile("def test_hello(): pass")
         result = testdir.runpytest(p, "--collect-only")
         result.stdout.fnmatch_lines(["*MyFile*test_issue88*", "*Module*test_issue88*"])

testing/example_scripts/conftest_usageerror/conftest.py

@@ -0,0 +1,4 @@
+def pytest_configure(config):
+    import pytest
+
+    raise pytest.UsageError("hello")

testing/example_scripts/issue88_initial_file_multinodes/conftest.py

@@ -0,0 +1,14 @@
+import pytest
+
+
+class MyFile(pytest.File):
+    def collect(self):
+        return [MyItem("hello", parent=self)]
+
+
+def pytest_collect_file(path, parent):
+    return MyFile(path, parent)
+
+
+class MyItem(pytest.Item):
+    pass

testing/example_scripts/issue88_initial_file_multinodes/test_hello.py

@@ -0,0 +1,2 @@
+def test_hello():
+    pass

testing/examples/test_issue519.py

@@ -0,0 +1,3 @@
+def test_510(testdir):
+    testdir.copy_example("issue_519.py")
+    testdir.runpytest("issue_519.py")

tox.ini

@@ -204,7 +204,7 @@ filterwarnings =
     ignore:.*type argument to addoption.*:DeprecationWarning
     # produced by python >=3.5 on execnet (pytest-xdist)
     ignore:.*inspect.getargspec.*deprecated, use inspect.signature.*:DeprecationWarning
-
+pytester_example_dir = testing/example_scripts
 [flake8]
 max-line-length = 120
 ignore = E203,W503