Set up local test infrastructure

Author: vidartf

.gitignore

@@ -1 +1,4 @@
 .DS_Store
+
+*.pyc
+.cache

pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+testpaths=tests
+norecursedirs=node_modules

tests/test_instantiate.py

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+
+import os
+import sys
+
+import pytest
+
+HERE = os.path.abspath(os.path.dirname(__file__))
+PROJECT_ROOT = os.path.dirname(HERE)
+
+pytest_plugins = "pytester"
+
+use_shell = os.name == 'nt'
+
+
+@pytest.fixture(scope='session')
+def example_instance(tmpdir_factory):
+    from cookiecutter.main import cookiecutter
+    import pip
+
+    tmpdir = tmpdir_factory.mktemp('example_instance')
+
+    with tmpdir.as_cwd():
+        cookiecutter(PROJECT_ROOT, no_input=True, config_file=os.path.join(HERE, 'testconfig.yaml'))
+        instance_path = tmpdir.join('jupyter-widget-testwidgets')
+        with instance_path.as_cwd():
+            print(str(instance_path))
+            try:
+                pip.main(['install', '-v', '-e', '.[test]'])
+                yield instance_path
+            finally:
+                try:
+                    pip.main(['uninstall', 'ipywidgettestwidgets', '-y'])
+                except Exception:
+                    pass
+
+
+def test_python_tests(example_instance, testdir):
+    with example_instance.as_cwd():
+        testdir.runpytest()
+
+
+def test_js_tests(example_instance):
+    from subprocess import check_call
+
+    cmd = ['npm', 'test']
+    with example_instance.as_cwd():
+        check_call(cmd, stdout=sys.stdout, stderr=sys.stderr, shell=use_shell)