# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Tests for loading tests by name.
"""

import os
import sys

import unittest as pyunit
from hashlib import md5

from twisted.python import util, filepath
from twisted.trial.test import packages
from twisted.trial import runner, reporter, unittest
from twisted.trial.itrial import ITestCase

from twisted.python.modules import getModule



def testNames(tests):
"""
Return the id of each test within the given test suite or case.
"""
names = []
for test in unittest._iterateTests(tests):
names.append(test.id())
return names



class FinderTest(packages.PackageTest):
"""
Tests for L{runner.TestLoader.findByName}.
"""
def setUp(self):
packages.PackageTest.setUp(self)
self.loader = runner.TestLoader()

def tearDown(self):
packages.PackageTest.tearDown(self)

def test_findPackage(self):
sample1 = self.loader.findByName('twisted')
import twisted as sample2
self.assertEqual(sample1, sample2)

def test_findModule(self):
sample1 = self.loader.findByName('twisted.trial.test.sample')
import sample as sample2
self.assertEqual(sample1, sample2)

def test_findFile(self):
path = util.sibpath(__file__, 'sample.py')
sample1 = self.loader.findByName(path)
import sample as sample2
self.assertEqual(sample1, sample2)

def test_findObject(self):
sample1 = self.loader.findByName('twisted.trial.test.sample.FooTest')
import sample
self.assertEqual(sample.FooTest, sample1)

def test_findNonModule(self):
self.failUnlessRaises(AttributeError,
self.loader.findByName,
'twisted.trial.test.nonexistent')

def test_findNonPackage(self):
self.failUnlessRaises(ValueError,
self.loader.findByName,
'nonextant')

def test_findNonFile(self):
path = util.sibpath(__file__, 'nonexistent.py')
self.failUnlessRaises(ValueError, self.loader.findByName, path)



class FileTest(packages.SysPathManglingTest):
"""
Tests for L{runner.filenameToModule}.
"""
def test_notFile(self):
"""
L{runner.filenameToModule} raises a C{ValueError} when a non-existing
file is passed.
"""
err = self.assertRaises(ValueError, runner.filenameToModule, 'it')
self.assertEqual(str(err), "'it' doesn't exist")


def test_moduleInPath(self):
"""
If the file in question is a module on the Python path, then it should
properly import and return that module.
"""
sample1 = runner.filenameToModule(util.sibpath(__file__, 'sample.py'))
import sample as sample2
self.assertEqual(sample2, sample1)


def test_moduleNotInPath(self):
"""
If passed the path to a file containing the implementation of a
module within a package which is not on the import path,
L{runner.filenameToModule} returns a module object loosely
resembling the module defined by that file anyway.
"""
# "test_sample" isn't actually the name of this module. However,
# filenameToModule can't seem to figure that out. So clean up this
# mis-named module. It would be better if this weren't necessary
# and filenameToModule either didn't exist or added a correctly
# named module to sys.modules.
self.addCleanup(sys.modules.pop, 'test_sample', None)

self.mangleSysPath(self.oldPath)
sample1 = runner.filenameToModule(
os.path.join(self.parent, 'goodpackage', 'test_sample.py'))
self.mangleSysPath(self.newPath)
from goodpackage import test_sample as sample2
self.assertEqual(os.path.splitext(sample2.__file__)[0],
os.path.splitext(sample1.__file__)[0])


def test_packageInPath(self):
"""
If the file in question is a package on the Python path, then it should
properly import and return that package.
"""
package1 = runner.filenameToModule(os.path.join(self.parent,
'goodpackage'))
import goodpackage
self.assertEqual(goodpackage, package1)


def test_packageNotInPath(self):
"""
If passed the path to a directory which represents a package which
is not on the import path, L{runner.filenameToModule} returns a
module object loosely resembling the package defined by that
directory anyway.
"""
# "__init__" isn't actually the name of the package! However,
# filenameToModule is pretty stupid and decides that is its name
# after all. Make sure it gets cleaned up. See the comment in
# test_moduleNotInPath for possible courses of action related to
# this.
self.addCleanup(sys.modules.pop, "__init__")

self.mangleSysPath(self.oldPath)
package1 = runner.filenameToModule(
os.path.join(self.parent, 'goodpackage'))
self.mangleSysPath(self.newPath)
import goodpackage
self.assertEqual(os.path.splitext(goodpackage.__file__)[0],
os.path.splitext(package1.__file__)[0])


def test_directoryNotPackage(self):
"""
L{runner.filenameToModule} raises a C{ValueError} when the name of an
empty directory is passed that isn't considered a valid Python package
because it doesn't contain a C{__init__.py} file.
"""
emptyDir = filepath.FilePath(self.parent).child("emptyDirectory")
emptyDir.createDirectory()

err = self.assertRaises(ValueError, runner.filenameToModule,
emptyDir.path)
self.assertEqual(str(err), "%r is not a package directory" % (
emptyDir.path,))


def test_filenameNotPython(self):
"""
L{runner.filenameToModule} raises a C{SyntaxError} when a non-Python
file is passed.
"""
filename = filepath.FilePath(self.parent).child('notpython')
filename.setContent("This isn't python")
self.failUnlessRaises(
SyntaxError, runner.filenameToModule, filename.path)


def test_filenameMatchesPackage(self):
"""
The C{__file__} attribute of the module should match the package name.
"""
filename = filepath.FilePath(self.parent).child('goodpackage.py')
filename.setContent(packages.testModule)

try:
module = runner.filenameToModule(filename.path)
self.assertEqual(filename.path, module.__file__)
finally:
filename.remove()


def test_directory(self):
"""
Test loader against a filesystem directory containing an empty
C{__init__.py} file. It should handle 'path' and 'path/' the same way.
"""
goodDir = filepath.FilePath(self.parent).child('goodDirectory')
goodDir.createDirectory()
goodDir.child('__init__.py').setContent('')

try:
module = runner.filenameToModule(goodDir.path)
self.assert_(module.__name__.endswith('goodDirectory'))
module = runner.filenameToModule(goodDir.path + os.path.sep)
self.assert_(module.__name__.endswith('goodDirectory'))
finally:
goodDir.remove()



class LoaderTest(packages.SysPathManglingTest):
"""
Tests for L{trial.TestLoader}.
"""

def setUp(self):
self.loader = runner.TestLoader()
packages.SysPathManglingTest.setUp(self)


def test_sortCases(self):
import sample
suite = self.loader.loadClass(sample.AlphabetTest)
self.assertEqual(['test_a', 'test_b', 'test_c'],
[test._testMethodName for test in suite._tests])
newOrder = ['test_b', 'test_c', 'test_a']
sortDict = dict(zip(newOrder, range(3)))
self.loader.sorter = lambda x : sortDict.get(x.shortDescription(), -1)
suite = self.loader.loadClass(sample.AlphabetTest)
self.assertEqual(newOrder,
[test._testMethodName for test in suite._tests])


def test_loadMethod(self):
import sample
suite = self.loader.loadMethod(sample.FooTest.test_foo)
self.assertEqual(1, suite.countTestCases())
self.assertEqual('test_foo', suite._testMethodName)


def test_loadFailingMethod(self):
# test added for issue1353
import erroneous
suite = self.loader.loadMethod(erroneous.TestRegularFail.test_fail)
result = reporter.TestResult()
suite.run(result)
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 1)


def test_loadNonMethod(self):
import sample
self.failUnlessRaises(TypeError, self.loader.loadMethod, sample)
self.failUnlessRaises(TypeError,
self.loader.loadMethod, sample.FooTest)
self.failUnlessRaises(TypeError, self.loader.loadMethod, "string")
self.failUnlessRaises(TypeError,
self.loader.loadMethod, ('foo', 'bar'))


def test_loadBadDecorator(self):
"""
A decorated test method for which the decorator has failed to set the
method's __name__ correctly is loaded and its name in the class scope
discovered.
"""
import sample
suite = self.loader.loadMethod(sample.DecorationTest.test_badDecorator)
self.assertEqual(1, suite.countTestCases())
self.assertEqual('test_badDecorator', suite._testMethodName)


def test_loadGoodDecorator(self):
"""
A decorated test method for which the decorator has set the method's
__name__ correctly is loaded and the only name by which it goes is used.
"""
import sample
suite = self.loader.loadMethod(
sample.DecorationTest.test_goodDecorator)
self.assertEqual(1, suite.countTestCases())
self.assertEqual('test_goodDecorator', suite._testMethodName)


def test_loadRenamedDecorator(self):
"""
Load a decorated method which has been copied to a new name inside the
class. Thus its __name__ and its key in the class's __dict__ no
longer match.
"""
import sample
suite = self.loader.loadMethod(
sample.DecorationTest.test_renamedDecorator)
self.assertEqual(1, suite.countTestCases())
self.assertEqual('test_renamedDecorator', suite._testMethodName)


def test_loadClass(self):
import sample
suite = self.loader.loadClass(sample.FooTest)
self.assertEqual(2, suite.countTestCases())
self.assertEqual(['test_bar', 'test_foo'],
[test._testMethodName for test in suite._tests])


def test_loadNonClass(self):
import sample
self.failUnlessRaises(TypeError, self.loader.loadClass, sample)
self.failUnlessRaises(TypeError,
self.loader.loadClass, sample.FooTest.test_foo)
self.failUnlessRaises(TypeError, self.loader.loadClass, "string")
self.failUnlessRaises(TypeError,
self.loader.loadClass, ('foo', 'bar'))


def test_loadNonTestCase(self):
import sample
self.failUnlessRaises(ValueError, self.loader.loadClass,
sample.NotATest)


def test_loadModule(self):
import sample
suite = self.loader.loadModule(sample)
self.assertEqual(10, suite.countTestCases())


def test_loadNonModule(self):
import sample
self.failUnlessRaises(TypeError,
self.loader.loadModule, sample.FooTest)
self.failUnlessRaises(TypeError,
self.loader.loadModule, sample.FooTest.test_foo)
self.failUnlessRaises(TypeError, self.loader.loadModule, "string")
self.failUnlessRaises(TypeError,
self.loader.loadModule, ('foo', 'bar'))


def test_loadPackage(self):
import goodpackage
suite = self.loader.loadPackage(goodpackage)
self.assertEqual(7, suite.countTestCases())


def test_loadNonPackage(self):
import sample
self.failUnlessRaises(TypeError,
self.loader.loadPackage, sample.FooTest)
self.failUnlessRaises(TypeError,
self.loader.loadPackage, sample.FooTest.test_foo)
self.failUnlessRaises(TypeError, self.loader.loadPackage, "string")
self.failUnlessRaises(TypeError,
self.loader.loadPackage, ('foo', 'bar'))


def test_loadModuleAsPackage(self):
import sample
## XXX -- should this instead raise a ValueError? -- jml
self.failUnlessRaises(TypeError, self.loader.loadPackage, sample)


def test_loadPackageRecursive(self):
import goodpackage
suite = self.loader.loadPackage(goodpackage, recurse=True)
self.assertEqual(14, suite.countTestCases())


def test_loadAnythingOnModule(self):
import sample
suite = self.loader.loadAnything(sample)
self.assertEqual(sample.__name__,
suite._tests[0]._tests[0].__class__.__module__)


def test_loadAnythingOnClass(self):
import sample
suite = self.loader.loadAnything(sample.FooTest)
self.assertEqual(2, suite.countTestCases())


def test_loadAnythingOnMethod(self):
import sample
suite = self.loader.loadAnything(sample.FooTest.test_foo)
self.assertEqual(1, suite.countTestCases())


def test_loadAnythingOnPackage(self):
import goodpackage
suite = self.loader.loadAnything(goodpackage)
self.failUnless(isinstance(suite, self.loader.suiteFactory))
self.assertEqual(7, suite.countTestCases())


def test_loadAnythingOnPackageRecursive(self):
import goodpackage
suite = self.loader.loadAnything(goodpackage, recurse=True)
self.failUnless(isinstance(suite, self.loader.suiteFactory))
self.assertEqual(14, suite.countTestCases())


def test_loadAnythingOnString(self):
# the important thing about this test is not the string-iness
# but the non-handledness.
self.failUnlessRaises(TypeError,
self.loader.loadAnything, "goodpackage")


def test_importErrors(self):
import package
suite = self.loader.loadPackage(package, recurse=True)
result = reporter.Reporter()
suite.run(result)
self.assertEqual(False, result.wasSuccessful())
self.assertEqual(2, len(result.errors))
errors = [test.id() for test, error in result.errors]
errors.sort()
self.assertEqual(errors, ['package.test_bad_module',
'package.test_import_module'])


def test_differentInstances(self):
"""
L{TestLoader.loadClass} returns a suite with each test method
represented by a different instances of the L{TestCase} they are
defined on.
"""
class DistinctInstances(pyunit.TestCase):
def test_1(self):
self.first = 'test1Run'

def test_2(self):
self.assertFalse(hasattr(self, 'first'))

suite = self.loader.loadClass(DistinctInstances)
result = reporter.Reporter()
suite.run(result)
self.assertTrue(result.wasSuccessful())


def test_loadModuleWith_test_suite(self):
"""
Check that C{test_suite} is used when present and other L{TestCase}s are
not included.
"""
from twisted.trial.test import mockcustomsuite
suite = self.loader.loadModule(mockcustomsuite)
self.assertEqual(0, suite.countTestCases())
self.assertEqual("MyCustomSuite", getattr(suite, 'name', None))


def test_loadModuleWith_testSuite(self):
"""
Check that C{testSuite} is used when present and other L{TestCase}s are
not included.
"""
from twisted.trial.test import mockcustomsuite2
suite = self.loader.loadModule(mockcustomsuite2)
self.assertEqual(0, suite.countTestCases())
self.assertEqual("MyCustomSuite", getattr(suite, 'name', None))


def test_loadModuleWithBothCustom(self):
"""
Check that if C{testSuite} and C{test_suite} are both present in a
module then C{testSuite} gets priority.
"""
from twisted.trial.test import mockcustomsuite3
suite = self.loader.loadModule(mockcustomsuite3)
self.assertEqual('testSuite', getattr(suite, 'name', None))


def test_customLoadRaisesAttributeError(self):
"""
Make sure that any C{AttributeError}s raised by C{testSuite} are not
swallowed by L{TestLoader}.
"""
def testSuite():
raise AttributeError('should be reraised')
from twisted.trial.test import mockcustomsuite2
mockcustomsuite2.testSuite, original = (testSuite,
mockcustomsuite2.testSuite)
try:
self.assertRaises(AttributeError, self.loader.loadModule,
mockcustomsuite2)
finally:
mockcustomsuite2.testSuite = original


# XXX - duplicated and modified from test_script
def assertSuitesEqual(self, test1, test2):
names1 = testNames(test1)
names2 = testNames(test2)
names1.sort()
names2.sort()
self.assertEqual(names1, names2)


def test_loadByNamesDuplicate(self):
"""
Check that loadByNames ignores duplicate names
"""
module = 'twisted.trial.test.test_log'
suite1 = self.loader.loadByNames([module, module], True)
suite2 = self.loader.loadByName(module, True)
self.assertSuitesEqual(suite1, suite2)


def test_loadByNamesPreservesOrder(self):
"""
L{TestLoader.loadByNames} preserves the order of tests provided to it.
"""
modules = [
"inheritancepackage.test_x.A.test_foo",
"twisted.trial.test.sample",
"goodpackage",
"twisted.trial.test.test_log",
"twisted.trial.test.sample.FooTest",
"package.test_module"]
suite1 = self.loader.loadByNames(modules)
suite2 = runner.TestSuite(map(self.loader.loadByName, modules))
self.assertEqual(testNames(suite1), testNames(suite2))


def test_loadDifferentNames(self):
"""
Check that loadByNames loads all the names that it is given
"""
modules = ['goodpackage', 'package.test_module']
suite1 = self.loader.loadByNames(modules)
suite2 = runner.TestSuite(map(self.loader.loadByName, modules))
self.assertSuitesEqual(suite1, suite2)

def test_loadInheritedMethods(self):
"""
Check that test methods names which are inherited from are all
loaded rather than just one.
"""
methods = ['inheritancepackage.test_x.A.test_foo',
'inheritancepackage.test_x.B.test_foo']
suite1 = self.loader.loadByNames(methods)
suite2 = runner.TestSuite(map(self.loader.loadByName, methods))
self.assertSuitesEqual(suite1, suite2)



class ZipLoadingTest(LoaderTest):
def setUp(self):
from twisted.python.test.test_zippath import zipit
LoaderTest.setUp(self)
zipit(self.parent, self.parent+'.zip')
self.parent += '.zip'
self.mangleSysPath(self.oldPath+[self.parent])



class PackageOrderingTest(packages.SysPathManglingTest):

def setUp(self):
self.loader = runner.TestLoader()
self.topDir = self.mktemp()
parent = os.path.join(self.topDir, "uberpackage")
os.makedirs(parent)
open(os.path.join(parent, "__init__.py"), "wb").close()
packages.SysPathManglingTest.setUp(self, parent)
self.mangleSysPath(self.oldPath + [self.topDir])

def _trialSortAlgorithm(self, sorter):
"""
Right now, halfway by accident, trial sorts like this:

1. all modules are grouped together in one list and sorted.

2. within each module, the classes are grouped together in one list
and sorted.

3. finally within each class, each test method is grouped together
in a list and sorted.

This attempts to return a sorted list of testable thingies following
those rules, so that we can compare the behavior of loadPackage.

The things that show as 'cases' are errors from modules which failed to
import, and test methods. Let's gather all those together.
"""
pkg = getModule('uberpackage')
testModules = []
for testModule in pkg.walkModules():
if testModule.name.split(".")[-1].startswith("test_"):
testModules.append(testModule)
sortedModules = sorted(testModules, key=sorter) # ONE
for modinfo in sortedModules:
# Now let's find all the classes.
module = modinfo.load(None)
if module is None:
yield modinfo
else:
testClasses = []
for attrib in modinfo.iterAttributes():
if runner.isTestCase(attrib.load()):
testClasses.append(attrib)
sortedClasses = sorted(testClasses, key=sorter) # TWO
for clsinfo in sortedClasses:
testMethods = []
for attr in clsinfo.iterAttributes():
if attr.name.split(".")[-1].startswith('test'):
testMethods.append(attr)
sortedMethods = sorted(testMethods, key=sorter) # THREE
for methinfo in sortedMethods:
yield methinfo


def loadSortedPackages(self, sorter=runner.name):
"""
Verify that packages are loaded in the correct order.
"""
import uberpackage
self.loader.sorter = sorter
suite = self.loader.loadPackage(uberpackage, recurse=True)
# XXX: Work around strange, unexplained Zope crap.
# jml, 2007-11-15.
suite = unittest.decorate(suite, ITestCase)
resultingTests = list(unittest._iterateTests(suite))
manifest = list(self._trialSortAlgorithm(sorter))
for number, (manifestTest, actualTest) in enumerate(
zip(manifest, resultingTests)):
self.assertEqual(
manifestTest.name, actualTest.id(),
"#%d: %s != %s" %
(number, manifestTest.name, actualTest.id()))
self.assertEqual(len(manifest), len(resultingTests))


def test_sortPackagesDefaultOrder(self):
self.loadSortedPackages()


def test_sortPackagesSillyOrder(self):
def sillySorter(s):
# This has to work on fully-qualified class names and class
# objects, which is silly, but it's the "spec", such as it is.
# if isinstance(s, type) or isinstance(s, types.ClassType):
# return s.__module__+'.'+s.__name__
n = runner.name(s)
d = md5(n).hexdigest()
return d
self.loadSortedPackages(sillySorter)