TST: raise nose.SkipTest -> pytest.skip

TST: remove KnownFailure (unused), should be replaced by pytest.xfail anyhow

TST: remove nose

xref #15341

.travis.yml

@@ -331,5 +331,5 @@ after_script:
   - echo "after_script start"
   - ci/install_test.sh
   - source activate pandas && python -c "import pandas; pandas.show_versions();"
-  - ci/print_skipped.py /tmp/nosetests.xml
+  - ci/print_skipped.py /tmp/pytest.xml
   - echo "after_script done"

ci/install_test.sh

@@ -8,7 +8,6 @@ if [ "$INSTALL_TEST" ]; then
     conda uninstall cython || exit 1
     python "$TRAVIS_BUILD_DIR"/setup.py sdist --formats=zip,gztar || exit 1
     pip install "$TRAVIS_BUILD_DIR"/dist/*tar.gz || exit 1
-    # nosetests --exe -A "$TEST_ARGS" pandas/tests/test_series.py --with-xunit --xunit-file=/tmp/nosetests_install.xml
     pytest pandas/tests/test_series.py --junitxml=/tmp/pytest_install.xml
 else
     echo "Skipping installation test."

ci/install_travis.sh

@@ -92,12 +92,7 @@ if [ -e ${INSTALL} ]; then
     time bash $INSTALL || exit 1
 else
     # create new env
-    time conda create -n pandas python=$PYTHON_VERSION nose pytest || exit 1
-
-    if [ "$LINT" ]; then
-        conda install flake8
-        pip install cpplint
-    fi
+    time conda create -n pandas python=$PYTHON_VERSION pytest || exit 1
 fi
 
 # build deps
@@ -116,6 +111,12 @@ fi
 
 source activate pandas
 
+pip install pytest-xdist
+if [ "$LINT" ]; then
+   conda install flake8
+   pip install cpplint
+fi
+
 if [ "$COVERAGE" ]; then
     pip install coverage pytest-cov
 fi

ci/lint.sh

@@ -55,7 +55,7 @@ if [ "$LINT" ]; then
     echo "Linting *.c and *.h DONE"
 
     echo "Check for invalid testing"
-    grep -r -E --include '*.py' --exclude nosetester.py --exclude testing.py '(numpy|np)\.testing' pandas
+    grep -r -E --include '*.py' --exclude testing.py '(numpy|np)\.testing' pandas
     if [ $? = "0" ]; then
         RET=1
     fi

ci/requirements_all.txt

@@ -1,6 +1,6 @@
-nose
 pytest
 pytest-cov
+pytest-xdist
 flake8
 sphinx
 ipython

ci/requirements_dev.txt

@@ -2,7 +2,7 @@ python-dateutil
 pytz
 numpy
 cython
-nose
 pytest
 pytest-cov
+pytest-xdist
 flake8

ci/script.sh

@@ -18,10 +18,10 @@ if [ -n "$LOCALE_OVERRIDE" ]; then
 fi
 
 if [ "$BUILD_TEST" ]; then
-    echo "We are not running nosetests as this is simply a build test."
+    echo "We are not running pytest as this is simply a build test."
 elif [ "$COVERAGE" ]; then
-    echo pytest -s --cov=pandas --cov-report xml:/tmp/nosetests.xml $TEST_ARGS pandas
-    pytest -s --cov=pandas --cov-report xml:/tmp/nosetests.xml $TEST_ARGS pandas
+    echo pytest -s --cov=pandas --cov-report xml:/tmp/pytest.xml $TEST_ARGS pandas
+    pytest -s --cov=pandas --cov-report xml:/tmp/pytest.xml $TEST_ARGS pandas
 else
     echo pytest $TEST_ARGS pandas
     pytest $TEST_ARGS pandas # TODO: doctest

doc/source/contributing.rst

@@ -734,7 +734,7 @@ gbq integration tests on a forked repository:
    the status by visiting your Travis branches page which exists at the
    following location: https://travis-ci.org/your-user-name/pandas/branches .
    Click on a build job for your branch. Expand the following line in the
-   build log: ``ci/print_skipped.py /tmp/nosetests.xml`` . Search for the
+   build log: ``ci/print_skipped.py /tmp/pytest.xml`` . Search for the
    term ``test_gbq`` and confirm that gbq integration tests are not skipped.
 
 Running the vbench performance test suite (phasing out)

pandas/computation/tests/test_compat.py

@@ -1,7 +1,7 @@
 
 # flake8: noqa
 
-import nose
+import pytest
 from itertools import product
 from distutils.version import LooseVersion
 
@@ -31,7 +31,7 @@ def test_compat():
             assert _NUMEXPR_INSTALLED
 
     except ImportError:
-        raise nose.SkipTest("not testing numexpr version compat")
+        pytest.skip("not testing numexpr version compat")
 
 
 def test_invalid_numexpr_version():
@@ -49,14 +49,14 @@ def testit():
         try:
             import numexpr as ne
         except ImportError:
-            raise nose.SkipTest("no numexpr")
+            pytest.skip("no numexpr")
         else:
             if ne.__version__ < LooseVersion('2.1'):
                 with tm.assertRaisesRegexp(ImportError, "'numexpr' version is "
                                            ".+, must be >= 2.1"):
                     testit()
             elif ne.__version__ == LooseVersion('2.4.4'):
-                raise nose.SkipTest("numexpr version==2.4.4")
+                pytest.skip("numexpr version==2.4.4")
             else:
                 testit()
     else:

pandas/computation/tests/test_eval.py

@@ -6,8 +6,7 @@
 from itertools import product
 from distutils.version import LooseVersion
 
-import nose
-from nose.tools import assert_raises
+import pytest
 
 from numpy.random import randn, rand, randint
 import numpy as np
@@ -319,7 +318,7 @@ def get_expected_pow_result(self, lhs, rhs):
         except ValueError as e:
             if str(e).startswith('negative number cannot be raised to a fractional power'):
                 if self.engine == 'python':
-                    raise nose.SkipTest(str(e))
+                    pytest.skip(str(e))
                 else:
                     expected = np.nan
             else:
@@ -1174,13 +1173,15 @@ def test_bool_ops_with_constants(self):
     def test_panel_fails(self):
         x = Panel(randn(3, 4, 5))
         y = Series(randn(10))
-        assert_raises(NotImplementedError, self.eval, 'x + y',
+        with pytest.raises(NotImplementedError):
+            self.eval('x + y',
                       local_dict={'x': x, 'y': y})
 
     def test_4d_ndarray_fails(self):
         x = randn(3, 4, 5, 6)
         y = Series(randn(10))
-        assert_raises(NotImplementedError, self.eval, 'x + y',
+        with pytest.raises(NotImplementedError):
+            self.eval('x + y',
                       local_dict={'x': x, 'y': y})
 
     def test_constant(self):
@@ -1705,7 +1706,7 @@ def test_result_types(self):
 
     def test_result_types2(self):
         # xref https://github.com/pandas-dev/pandas/issues/12293
-        raise nose.SkipTest("unreliable tests on complex128")
+        pytest.skip("unreliable tests on complex128")
 
         # Did not test complex64 because DataFrame is converting it to
         # complex128. Due to https://github.com/pandas-dev/pandas/issues/10952
@@ -1822,7 +1823,8 @@ def check_disallowed_nodes(engine, parser):
     inst = VisitorClass('x + 1', engine, parser)
 
     for ops in uns_ops:
-        assert_raises(NotImplementedError, getattr(inst, ops))
+        with pytest.raises(NotImplementedError):
+            getattr(inst, ops)()
 
 
 def test_disallowed_nodes():
@@ -1833,7 +1835,8 @@ def test_disallowed_nodes():
 def check_syntax_error_exprs(engine, parser):
     tm.skip_if_no_ne(engine)
     e = 's +'
-    assert_raises(SyntaxError, pd.eval, e, engine=engine, parser=parser)
+    with pytest.raises(SyntaxError):
+        pd.eval(e, engine=engine, parser=parser)
 
 
 def test_syntax_error_exprs():

pandas/io/tests/json/test_pandas.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # pylint: disable-msg=W0612,E1101
-import nose
+import pytest
 from pandas.compat import range, lrange, StringIO, OrderedDict
 import os
 
@@ -1009,8 +1009,8 @@ def test_latin_encoding(self):
             return
 
         # GH 13774
-        raise nose.SkipTest("encoding not implemented in .to_json(), "
-                            "xref #13774")
+        pytest.skip("encoding not implemented in .to_json(), "
+                    "xref #13774")
 
         values = [[b'E\xc9, 17', b'', b'a', b'b', b'c'],
                   [b'E\xc9, 17', b'a', b'b', b'c'],

pandas/io/tests/json/test_ujson.py

@@ -7,7 +7,7 @@
 except ImportError:
     import simplejson as json
 import math
-import nose
+import pytest
 import platform
 import sys
 import time
@@ -28,7 +28,7 @@
 def _skip_if_python_ver(skip_major, skip_minor=None):
     major, minor = sys.version_info[:2]
     if major == skip_major and (skip_minor is None or minor == skip_minor):
-        raise nose.SkipTest("skipping Python version %d.%d" % (major, minor))
+        pytest.skip("skipping Python version %d.%d" % (major, minor))
 
 
 json_unicode = (json.dumps if compat.PY3
@@ -95,7 +95,7 @@ def test_encodeNonCLocale(self):
             try:
                 locale.setlocale(locale.LC_NUMERIC, 'Italian_Italy')
             except:
-                raise nose.SkipTest('Could not set locale for testing')
+                pytest.skip('Could not set locale for testing')
         self.assertEqual(ujson.loads(ujson.dumps(4.78e60)), 4.78e60)
         self.assertEqual(ujson.loads('4.78', precise_float=True), 4.78)
         locale.setlocale(locale.LC_NUMERIC, savedlocale)
@@ -113,7 +113,7 @@ def test_decimalDecodeTestPrecise(self):
 
     def test_encodeDoubleTinyExponential(self):
         if compat.is_platform_windows() and not compat.PY3:
-            raise nose.SkipTest("buggy on win-64 for py2")
+            pytest.skip("buggy on win-64 for py2")
 
         num = 1e-40
         self.assertEqual(num, ujson.decode(ujson.encode(num)))
@@ -393,8 +393,8 @@ def test_nat(self):
     def test_npy_nat(self):
         from distutils.version import LooseVersion
         if LooseVersion(np.__version__) < '1.7.0':
-            raise nose.SkipTest("numpy version < 1.7.0, is "
-                                "{0}".format(np.__version__))
+            pytest.skip("numpy version < 1.7.0, is "
+                        "{0}".format(np.__version__))
 
         input = np.datetime64('NaT')
         assert ujson.encode(input) == 'null', "Expected null"

pandas/io/tests/parser/c_parser_only.py

@@ -7,7 +7,7 @@
 further arguments when parsing.
 """
 
-import nose
+import pytest
 import numpy as np
 
 import pandas as pd
@@ -159,7 +159,7 @@ def error(val):
 
     def test_pass_dtype_as_recarray(self):
         if compat.is_platform_windows() and self.low_memory:
-            raise nose.SkipTest(
+            pytest.skip(
                 "segfaults on win-64, only when all tests are run")
 
         data = """\

pandas/io/tests/parser/common.py

@@ -9,7 +9,7 @@
 import sys
 from datetime import datetime
 
-import nose
+import pytest
 import numpy as np
 from pandas.lib import Timestamp
 
@@ -635,8 +635,8 @@ def test_file(self):
             url_table = self.read_table('file://localhost/' + localtable)
         except URLError:
             # fails on some systems
-            raise nose.SkipTest("failing on %s" %
-                                ' '.join(platform.uname()).strip())
+            pytest.skip("failing on %s" %
+                        ' '.join(platform.uname()).strip())
 
         tm.assert_frame_equal(url_table, local_table)
 
@@ -1262,7 +1262,7 @@ def test_verbose_import(self):
 
     def test_iteration_open_handle(self):
         if PY3:
-            raise nose.SkipTest(
+            pytest.skip(
                 "won't work in Python 3 {0}".format(sys.version_info))
 
         with tm.ensure_clean() as path:

pandas/io/tests/parser/compression.py

@@ -5,7 +5,7 @@
 of the parsers defined in parsers.py
 """
 
-import nose
+import pytest
 
 import pandas.util.testing as tm
 
@@ -16,7 +16,7 @@ def test_zip(self):
         try:
             import zipfile
         except ImportError:
-            raise nose.SkipTest('need zipfile to run')
+            pytest.skip('need zipfile to run')
 
         with open(self.csv1, 'rb') as data_file:
             data = data_file.read()
@@ -67,7 +67,7 @@ def test_gzip(self):
         try:
             import gzip
         except ImportError:
-            raise nose.SkipTest('need gzip to run')
+            pytest.skip('need gzip to run')
 
         with open(self.csv1, 'rb') as data_file:
             data = data_file.read()
@@ -96,7 +96,7 @@ def test_bz2(self):
         try:
             import bz2
         except ImportError:
-            raise nose.SkipTest('need bz2 to run')
+            pytest.skip('need bz2 to run')
 
         with open(self.csv1, 'rb') as data_file:
             data = data_file.read()

pandas/io/tests/parser/converters.py

@@ -7,7 +7,7 @@
 
 from datetime import datetime
 
-import nose
+import pytest
 
 import numpy as np
 import pandas as pd
@@ -84,8 +84,8 @@ def test_converter_return_string_bug(self):
     def test_converters_corner_with_nas(self):
         # skip aberration observed on Win64 Python 3.2.2
         if hash(np.int64(-1)) != -2:
-            raise nose.SkipTest("skipping because of windows hash on Python"
-                                " 3.2.2")
+            pytest.skip("skipping because of windows hash on Python"
+                        " 3.2.2")
 
         data = """id,score,days
 1,2,12

pandas/io/tests/parser/parse_dates.py

@@ -8,7 +8,7 @@
 from distutils.version import LooseVersion
 from datetime import datetime
 
-import nose
+import pytest
 import numpy as np
 import pandas.lib as lib
 from pandas.lib import Timestamp
@@ -268,9 +268,9 @@ def test_yy_format_with_yearfirst(self):
         # See gh-217
         import dateutil
         if dateutil.__version__ >= LooseVersion('2.5.0'):
-            raise nose.SkipTest("testing yearfirst=True not-support"
-                                "on datetutil < 2.5.0 this works but"
-                                "is wrong")
+            pytest.skip("testing yearfirst=True not-support"
+                        "on datetutil < 2.5.0 this works but"
+                        "is wrong")
 
         rs = self.read_csv(StringIO(data), index_col=0,
                            parse_dates=[['date', 'time']])