Fix PyPy2 Windows IntegrationTests (#76)

IntegrationTests.test_errors is failing on Windows under PyPy2
as its stderr emits \r\r\n as the line separator.

Add AppVeyor testing for three PyPy releases.

Also add a test for the other more complex stderr message emitted
by the Reporter.

Author: jayvdb

.appveyor.yml

@@ -1,8 +1,46 @@
 # To activate, change the Appveyor settings to use `.appveyor.yml`.
 install:
-  - python -m pip install tox
+  - python -m pip install --upgrade virtualenv pip setuptools tox
+
+  # Fetch the three main PyPy releases
+  - ps: (New-Object Net.WebClient).DownloadFile('https://bitbucket.org/pypy/pypy/downloads/pypy-2.6.1-win32.zip', "$env:appveyor_build_folder\pypy-2.6.1-win32.zip")
+  - ps: 7z x pypy-2.6.1-win32.zip | Out-Null
+  - move pypy-2.6.1-win32 C:\
+
+  - ps: (New-Object Net.WebClient).DownloadFile('https://bitbucket.org/pypy/pypy/downloads/pypy2-v5.3.1-win32.zip', "$env:appveyor_build_folder\pypy2-v5.3.1-win32.zip")
+  - ps: 7z x pypy2-v5.3.1-win32.zip | Out-Null
+  - move pypy2-v5.3.1-win32 C:\
+
+  - ps: (New-Object Net.WebClient).DownloadFile('https://bitbucket.org/pypy/pypy/downloads/pypy3-2.4.0-win32.zip', "$env:appveyor_build_folder\pypy3-2.4.0-win32.zip")
+  - ps: 7z x pypy3-2.4.0-win32.zip | Out-Null
+  - move pypy3-2.4.0-win32 C:\
+
+  # pypy3 installer provides 'pypy.exe', not pypy3.exe.
+  - copy C:\pypy3-2.4.0-win32\pypy.exe C:\pypy3-2.4.0-win32\pypy3.exe
+
+  # workaround https://github.com/pypa/virtualenv/issues/93
+  - mkdir C:\python33\tcl\tcl8.6
+  - mkdir C:\python33\tcl\tk8.6
+  - mkdir C:\pypy3-2.4.0-win32\tcl\tcl8.6
+  - mkdir C:\pypy3-2.4.0-win32\tcl\tk8.6
+
+  # Only pypy2-5.3.1 is integrated into tox, as pypy3-2.4.0 fails and
+  # a Windows distribution of pypy3-5.2 isnt available yet.
+  - ps: $env:path = "$env:path;C:\pypy2-v5.3.1-win32"
+
+  # pypy3-2.4.0 and pypy-2.6.1 are manually bootstrapped and tested
+  - ps: (New-Object Net.WebClient).DownloadFile('https://bootstrap.pypa.io/get-pip.py', "$env:appveyor_build_folder\get-pip.py")
+  - git clone https://github.com/pypa/setuptools/
+  - cd setuptools
+  - C:\pypy3-2.4.0-win32\pypy3 bootstrap.py
+  - C:\pypy3-2.4.0-win32\pypy3 setup.py install
+  - C:\pypy-2.6.1-win32\pypy bootstrap.py
+  - C:\pypy-2.6.1-win32\pypy setup.py install
+  - cd ..
 
 build: off
 
 test_script:
   - python -m tox
+  - C:\pypy3-2.4.0-win32\pypy3 setup.py test -q
+  - C:\pypy-2.6.1-win32\pypy setup.py test -q

pyflakes/test/test_api.py

@@ -8,6 +8,7 @@
 import subprocess
 import tempfile
 
+from pyflakes.checker import PY2
 from pyflakes.messages import UnusedImport
 from pyflakes.reporter import Reporter
 from pyflakes.api import (
@@ -30,6 +31,12 @@
 except AttributeError:
     PYPY = False
 
+try:
+    WindowsError
+    WIN = True
+except NameError:
+    WIN = False
+
 ERROR_HAS_COL_NUM = ERROR_HAS_LAST_LINE = sys.version_info >= (3, 2) or PYPY
 
 
@@ -661,6 +668,9 @@ def runPyflakes(self, paths, stdin=None):
         if sys.version_info >= (3,):
             stdout = stdout.decode('utf-8')
             stderr = stderr.decode('utf-8')
+        # Workaround https://bitbucket.org/pypy/pypy/issues/2350
+        if PYPY and PY2 and WIN:
+            stderr = stderr.replace('\r\r\n', '\r\n')
         return (stdout, stderr, rv)
 
     def test_goodFile(self):
@@ -685,7 +695,7 @@ def test_fileWithFlakes(self):
         expected = UnusedImport(self.tempfilepath, Node(1), 'contraband')
         self.assertEqual(d, ("%s%s" % (expected, os.linesep), '', 1))
 
-    def test_errors(self):
+    def test_errors_io(self):
         """
         When pyflakes finds errors with the files it's given, (if they don't
         exist, say), then the return code is non-zero and the errors are
@@ -696,6 +706,20 @@ def test_errors(self):
                                                          os.linesep)
         self.assertEqual(d, ('', error_msg, 1))
 
+    def test_errors_syntax(self):
+        """
+        When pyflakes finds errors with the files it's given, (if they don't
+        exist, say), then the return code is non-zero and the errors are
+        printed to stderr.
+        """
+        fd = open(self.tempfilepath, 'wb')
+        fd.write("import".encode('ascii'))
+        fd.close()
+        d = self.runPyflakes([self.tempfilepath])
+        error_msg = '{0}:1:{2}: invalid syntax{1}import{1}    {3}^{1}'.format(
+            self.tempfilepath, os.linesep, 5 if PYPY else 7, '' if PYPY else '  ')
+        self.assertEqual(d, ('', error_msg, True))
+
     def test_readFromStdin(self):
         """
         If no arguments are passed to C{pyflakes} then it reads from stdin.