def test_import_plugin_importname(self, testdir):
plugins = PytestPlugins()
py.test.raises(ImportError, 'plugins.import_plugin("x.y")')
py.test.raises(ImportError, 'plugins.import_plugin("pytest_x.y")')
reset = testdir.syspathinsert()
pluginname = "pytest_hello"
testdir.makepyfile(**{pluginname: """
class HelloPlugin:
pass
"""})
plugins.import_plugin("hello")
len1 = len(plugins.getplugins())
plugins.import_plugin("pytest_hello")
len2 = len(plugins.getplugins())
assert len1 == len2
plugin1 = plugins.getplugin("pytest_hello")
assert plugin1.__class__.__name__ == 'HelloPlugin'
plugin2 = plugins.getplugin("hello")
assert plugin2 is plugin1
