import pytest
from collections import OrderedDict
from insights.parsers import split_kv_pairs, unsplit_lines, parse_fixed_table
from insights.parsers import calc_offset, optlist_to_dict, keyword_search
from insights.parsers import parse_delimited_table, ParseException, SkipException

SPLIT_TEST_1 = """
# Comment line

  keyword1 = value1   # Inline comments

  # Comment indented
  keyword3     # Key with no separator
  keyword2 = value2a=True, value2b=100M

""".strip()

SPLIT_TEST_1_OD = OrderedDict([
    ('keyword1', 'value1'),
    ('keyword3', ''),
    ('keyword2', 'value2a=True, value2b=100M')
])

SPLIT_TEST_2 = """
@ Comment line

  keyword1: value1   @ Inline comments
  keyword2 : value2a=True, value2b=100M

  @ Comment indented
  keyword3     @ Key with no separator
""".strip()

OFFSET_CONTENT_1 = """
  data 1 line
data 2 line
""".strip()

OFFSET_CONTENT_2 = """
#
Warning line
Error line
    data 1 line
    data 2 line
Trailing line

Blank line above
Another trailing line
    Yet another trailing line
    Yet yet another trailing line
""".strip()


def test_split_kv_pairs():
    kv_pairs = split_kv_pairs(SPLIT_TEST_1.splitlines())
    assert len(kv_pairs) == 2
    assert kv_pairs == {
        'keyword1': 'value1',
        'keyword2': 'value2a=True, value2b=100M'
    }

    kv_pairs = split_kv_pairs(SPLIT_TEST_1.splitlines(), filter_string='value2')
    assert len(kv_pairs) == 1
    assert kv_pairs == {
        'keyword2': 'value2a=True, value2b=100M'
    }

    kv_pairs = split_kv_pairs(SPLIT_TEST_1.splitlines(), use_partition=True)
    assert len(kv_pairs) == 3
    assert kv_pairs == {
        'keyword1': 'value1',
        'keyword2': 'value2a=True, value2b=100M',
        'keyword3': ''
    }

    kv_pairs = split_kv_pairs(SPLIT_TEST_1.splitlines(), use_partition=True, ordered=True)
    assert len(kv_pairs) == 3
    assert kv_pairs == SPLIT_TEST_1_OD

    kv_pairs = split_kv_pairs(SPLIT_TEST_2.splitlines(), comment_char='@', split_on=':')
    assert len(kv_pairs) == 2
    assert kv_pairs == {
        'keyword1': 'value1',
        'keyword2': 'value2a=True, value2b=100M'
    }

    kv_pairs = split_kv_pairs(SPLIT_TEST_2.splitlines(), comment_char='@', split_on=':', filter_string='value2')
    assert len(kv_pairs) == 1
    assert kv_pairs == {
        'keyword2': 'value2a=True, value2b=100M'
    }

    kv_pairs = split_kv_pairs(SPLIT_TEST_2.splitlines(), comment_char='@', split_on=':', use_partition=True)
    assert len(kv_pairs) == 3
    assert kv_pairs == {
        'keyword1': 'value1',
        'keyword2': 'value2a=True, value2b=100M',
        'keyword3': ''
    }


SPLIT_LINES = """
Line one
Line two part 1 \\
         line two part 2\\
         line two part 3
Line three
""".strip()
SPLIT_LINES_2 = """
Line one
Line two part 1 ^
         line two part 2^
         line two part 3
Line three^
""".strip()
SPLIT_LINES_3 = """
web.default_taskmaster_tasks = RHN::Task::SessionCleanup, RHN::Task::ErrataQueue,
    RHN::Task::ErrataEngine,
    RHN::Task::DailySummary, RHN::Task::SummaryPopulation,
    RHN::Task::RHNProc,
    RHN::Task::PackageCleanup

db_host ="""


def test_unsplit_lines():
    lines = list(unsplit_lines(SPLIT_LINES.splitlines()))
    assert len(lines) == 3
    assert lines[0] == 'Line one'
    assert lines[1] == 'Line two part 1          line two part 2         line two part 3'
    assert lines[2] == 'Line three'

    lines = list(unsplit_lines(SPLIT_LINES_2.splitlines(), cont_char='^'))
    assert len(lines) == 3
    assert lines[0] == 'Line one'
    assert lines[1] == 'Line two part 1          line two part 2         line two part 3'
    assert lines[2] == 'Line three'  # test continuation on last line

    # Test keeping continuation character on line
    lines = list(unsplit_lines(
        SPLIT_LINES_3.splitlines(), cont_char=',', keep_cont_char=True
    ))
    assert len(lines) == 4
    assert lines[0] == ''
    assert lines[1] == 'web.default_taskmaster_tasks = RHN::Task::SessionCleanup, RHN::Task::ErrataQueue,    RHN::Task::ErrataEngine,    RHN::Task::DailySummary, RHN::Task::SummaryPopulation,    RHN::Task::RHNProc,    RHN::Task::PackageCleanup'
    assert lines[2] == ''
    assert lines[3] == 'db_host ='


def test_calc_offset():
    assert calc_offset(OFFSET_CONTENT_1.splitlines(), target=[]) == 0
    assert calc_offset(OFFSET_CONTENT_1.splitlines(), target=[None]) == 0
    assert calc_offset(OFFSET_CONTENT_1.splitlines(), target=['data ']) == 0
    with pytest.raises(ValueError):
        calc_offset(OFFSET_CONTENT_1.splitlines(), target=['xdata '])
    with pytest.raises(ValueError):
        calc_offset(OFFSET_CONTENT_1.splitlines(),
                    target=['data '],
                    invert_search=True)
    assert calc_offset(OFFSET_CONTENT_1.splitlines(),
                       target=['Trailing', 'Blank', 'Another '],
                       invert_search=True) == 0
    assert calc_offset(OFFSET_CONTENT_2.splitlines(), target=[]) == 0
    assert calc_offset(OFFSET_CONTENT_2.splitlines(), target=['data ']) == 3
    assert calc_offset(reversed(OFFSET_CONTENT_2.splitlines()),
                       target=['Trailing', 'Blank', 'Another ', 'Yet'],
                       invert_search=True) == 6


FIXED_CONTENT_1 = """
Column1    Column2    Column3
data1      data 2     data   3
     data4 data5      data6
data     7            data   9
""".strip()

FIXED_CONTENT_1A = """
    WARNING
    Column1    Column2    Column3
    data1      data 2     data   3
         data4 data5      data6
    data     7            data   9
""".strip()

FIXED_CONTENT_1B = """
Column1    Column2    Column3
data1      data 2
data4      data5      data6
  data   7            data   9
""".strip()

FIXED_CONTENT_2 = """
WARNING WARNING WARNING
 Some message
Another message
Column1    Column2    Column3
data1      data 2     data   3
     data4 data5      data6
data     7            data   9
""".strip()

FIXED_CONTENT_3 = """
WARNING WARNING WARNING
 Some message
Another message
Column1    Column2    Column3
data1      data 2     data   3
     data4 data5      data6
data     7            data   9
Trailing non-data line
 Another trailing non-data line
""".strip()

FIXED_CONTENT_4 = """
WARNING WARNING WARNING
 Some message
Another message
Column1    Column 2    Column 3
data1      data 2      data   3
     data4 data5       data6
data     7             data   9
data10
Trailing non-data line
 Another trailing non-data line
""".strip()


def test_parse_fixed_table():
    data = parse_fixed_table(FIXED_CONTENT_1.splitlines())
    assert len(data) == 3
    assert data[0] == {'Column1': 'data1', 'Column2': 'data 2', 'Column3': 'data   3'}
    assert data[1] == {'Column1': 'data4', 'Column2': 'data5', 'Column3': 'data6'}
    assert data[2] == {'Column1': 'data     7', 'Column2': '', 'Column3': 'data   9'}

    data = parse_fixed_table(FIXED_CONTENT_1A.splitlines(), heading_ignore=['Column1 '])
    assert len(data) == 3
    assert data[0] == {'Column1': 'data1', 'Column2': 'data 2', 'Column3': 'data   3'}
    assert data[1] == {'Column1': 'data4', 'Column2': 'data5', 'Column3': 'data6'}
    assert data[2] == {'Column1': 'data     7', 'Column2': '', 'Column3': 'data   9'}

    data = parse_fixed_table(FIXED_CONTENT_1B.splitlines())
    assert len(data) == 3
    assert data[0] == {'Column1': 'data1', 'Column2': 'data 2', 'Column3': ''}
    assert data[1] == {'Column1': 'data4', 'Column2': 'data5', 'Column3': 'data6'}
    assert data[2] == {'Column1': 'data   7', 'Column2': '', 'Column3': 'data   9'}

    data = parse_fixed_table(FIXED_CONTENT_2.splitlines(), heading_ignore=['Column1 '])
    assert len(data) == 3
    assert data[0] == {'Column1': 'data1', 'Column2': 'data 2', 'Column3': 'data   3'}
    assert data[1] == {'Column1': 'data4', 'Column2': 'data5', 'Column3': 'data6'}
    assert data[2] == {'Column1': 'data     7', 'Column2': '', 'Column3': 'data   9'}

    data = parse_fixed_table(FIXED_CONTENT_3.splitlines(),
                             heading_ignore=['Column1 '],
                             trailing_ignore=['Trailing', 'Another'])
    assert len(data) == 3
    assert data[0] == {'Column1': 'data1', 'Column2': 'data 2', 'Column3': 'data   3'}
    assert data[1] == {'Column1': 'data4', 'Column2': 'data5', 'Column3': 'data6'}
    assert data[2] == {'Column1': 'data     7', 'Column2': '', 'Column3': 'data   9'}

    data = parse_fixed_table(FIXED_CONTENT_4.splitlines(),
                             heading_ignore=['Column1 '],
                             header_substitute=[('Column 2', 'Column_2'), ('Column 3', 'Column_3')],
                             trailing_ignore=['Trailing', 'Another'])
    assert len(data) == 4
    assert data[0] == {'Column1': 'data1', 'Column_2': 'data 2', 'Column_3': 'data   3'}
    assert data[1] == {'Column1': 'data4', 'Column_2': 'data5', 'Column_3': 'data6'}
    assert data[2] == {'Column1': 'data     7', 'Column_2': '', 'Column_3': 'data   9'}
    assert data[3] == {'Column1': 'data10', 'Column_2': '', 'Column_3': ''}

    # Test that if we search for trailing data that is always found, then we
    # should get the whole thing parsed as a table from the header line
    data = parse_fixed_table(
        ['foo' + line for line in FIXED_CONTENT_4.splitlines()],
        heading_ignore=['fooColumn1 '],
        header_substitute=[('fooColumn1', 'Column1'), ('Column 2', 'Column_2'), ('Column 3', 'Column_3')],
        trailing_ignore=['foo']
    )
    assert len(data) == 6
    assert data[4] == {'Column1': 'fooTrailing', 'Column_2': 'non-data li', 'Column_3': 'ne'}
    assert data[5] == {'Column1': 'foo Another', 'Column_2': 'trailing no', 'Column_3': 'n-data line'}


def test_optlist_standard():
    d = optlist_to_dict('key1,key2=val2,key1=val1,key3')
    assert sorted(d.keys()) == sorted(['key1', 'key2', 'key3'])
    assert d['key1'] == 'val1'
    assert d['key2'] == 'val2'
    assert d['key3'] is True


def test_optlist_no_vals():
    d = optlist_to_dict('key1,key2=val2,key1=val1,key3', kv_sep=None)
    assert sorted(d.keys()) == sorted(['key1', 'key1=val1', 'key2=val2', 'key3'])
    assert d['key1'] is True
    assert d['key1=val1'] is True
    assert d['key2=val2'] is True
    assert d['key3'] is True


def test_optlist_strip_quotes():
    d = optlist_to_dict(
        '''key1="foo",key2='bar',key3="mismatched quotes',key4="inner'quotes"''',
        strip_quotes=True
    )
    assert sorted(d.keys()) == sorted(['key1', 'key2', 'key3', 'key4'])
    assert d['key1'] == 'foo'
    assert d['key2'] == 'bar'
    assert d['key3'] == '"mismatched quotes\''
    assert d['key4'] == "inner'quotes"


PS_AUX_TEST = """
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0  19356  1544 ?        Ss   May31   0:01 /sbin/init
root      1821  0.0  0.0      0     0 ?        S    May31   0:25 [kondemand/0]
root      1864  0.0  0.0  18244   668 ?        Ss   May31   0:05 irqbalance --pid=/var/run/irqbalance.pid
user1    20160  0.0  0.0 108472  1896 pts/3    Ss   10:09   0:00 bash
root     20357  0.0  0.0   9120   760 ?        Ss   10:09   0:00 /sbin/dhclient -1 -q -lf /var/lib/dhclient/dhclient-extbr0.leases -pf /var/run/dhclient-extbr0.pid extbr0
qemu     22673  0.8 10.2 1618556 805636 ?      Sl   11:38   1:07 /usr/libexec/qemu-kvm -name rhel7 -S -M rhel6.5.0 -enable-kvm -m 1024 -smp 2,sockets=2,cores=1,threads=1 -uuid 13798ffc-bc1e-d437-4f3f-2e0fa6c923ad
"""

MISSING_DATA_TEST = """
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
LVM2_PV_FMT|LVM2_PV_UUID|LVM2_DEV_SIZE|LVM2_PV_NAME|LVM2_PV_MAJOR|LVM2_PV_MINOR|LVM2_PV_MDA_FREE|LVM2_PV_MDA_SIZE|LVM2_PV_EXT_VSN|LVM2_PE_START|LVM2_PV_SIZE|LVM2_PV_FREE|LVM2_PV_USED|LVM2_PV_ATTR|LVM2_PV_ALLOCATABLE|LVM2_PV_EXPORTED|LVM2_PV_MISSING|LVM2_PV_PE_COUNT|LVM2_PV_PE_ALLOC_COUNT|LVM2_PV_TAGS|LVM2_PV_MDA_COUNT|LVM2_PV_MDA_USED_COUNT|LVM2_PV_BA_START|LVM2_PV_BA_SIZE|LVM2_PV_IN_USE|LVM2_PV_DUPLICATE|LVM2_VG_NAME
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
"""

SUBSTITUTE_HEADERS_TEST = """
address,port,state,read-only
0.0.0.0,3000,LISTEN,N
10.76.19.184,37500,ESTAB,Y
""".strip()

POSTGRESQL_LOG = """
 schema |             table              |   rows
 public | rhnsnapshotpackage             | 47428950
 public | rhnpackagefile                 | 32174333
 public | rhnpackagecapability           | 12934215
 public | rhnpackagechangelogrec         | 11269933
 public | rhnchecksum                    | 10129746
 public | rhnactionconfigrevision        |  2894957
 public | rhnpackageprovides             |  2712442
 public | rhnpackagerequires             |  2532861
 public | rhn_command_target             |  1009152
 public | rhnconfigfilename              |        0
 public | rhnxccdfidentsystem            |        0
 public | rhndistchannelmap              |        0
 public | rhnactionvirtshutdown          |        0
 public | rhnpublicchannelfamily         |        0
 (402 rows)
""".strip()  # Normally has a --- separator line, which is ignored using get_active_lines

TABLE2 = [
    "SID   Nr   Instance    SAPLOCALHOST                        Version                 DIR_EXECUTABLE",
    "HA2|  16|       D16|         lu0417|749, patch 10, changelist 1698137|          /usr/sap/HA2/D16/exe",
    "HA2|  22|       D22|         lu0417|749, patch 10, changelist 1698137|          /usr/sap/HA2/D22/exe"
]

TABLE3 = """
THIS | IS | A | HEADER
this ^ is ^ some ^ content
This ^ is ^ more ^ content
""".strip()


def test_parse_delimited_table():
    # No content?  No table.
    assert parse_delimited_table([]) == []

    # Test maximum splits and header 'ignore', which should actually be
    # called 'header_startswith'
    tbl = parse_delimited_table(
        PS_AUX_TEST.splitlines(), max_splits=10, heading_ignore=['USER']
    )
    assert tbl
    assert isinstance(tbl, list)
    assert len(tbl) == 6
    assert isinstance(tbl[0], dict)
    assert tbl[0] == {
        '%MEM': '0.0', 'TTY': '?', 'VSZ': '19356', 'PID': '1', '%CPU': '0.0',
        'START': 'May31', 'COMMAND': '/sbin/init', 'USER': 'root',
        'STAT': 'Ss', 'TIME': '0:01', 'RSS': '1544'
    }
    assert tbl[5]['COMMAND'] == \
        '/usr/libexec/qemu-kvm -name rhel7 -S -M rhel6.5.0 -enable-kvm -m 1024 -smp 2,sockets=2,cores=1,threads=1 -uuid 13798ffc-bc1e-d437-4f3f-2e0fa6c923ad'

    # Test trailing ignore not found
    tbl = parse_delimited_table(
        MISSING_DATA_TEST.splitlines(), delim='|',
        heading_ignore=['LVM2_PV_FMT'],
        trailing_ignore=['WARNING', 'ERROR', 'Cannot get lock']
    )
    assert isinstance(tbl, list)
    assert len(tbl) == 0

    # Header substitution
    tbl = parse_delimited_table(
        SUBSTITUTE_HEADERS_TEST.splitlines(), delim=',', strip=False,
        header_substitute=[('read-only', 'read_only')]
    )
    assert tbl
    assert isinstance(tbl, list)
    assert len(tbl) == 2
    assert isinstance(tbl[1], dict)
    assert tbl[1] == {
        'address': '10.76.19.184', 'port': '37500', 'state': 'ESTAB', 'read_only': 'Y'
    }

    # Test change of delimiter and trailing_ignore
    tbl = parse_delimited_table(POSTGRESQL_LOG.splitlines(), delim='|', trailing_ignore=['('])
    assert isinstance(tbl, list)
    assert len(tbl) == 14
    assert isinstance(tbl[0], dict)
    assert tbl[0] == {
        'schema': 'public', 'table': 'rhnsnapshotpackage', 'rows': '47428950'
    }

    # Test using different header delimiter
    result = parse_delimited_table(TABLE3.splitlines(), delim="^", header_delim="|")
    assert isinstance(result, list)
    assert len(result) == 2
    assert isinstance(result[0], dict)
    expected = [{"THIS": "this", "IS": "is", "A": "some", "HEADER": "content"},
                {"THIS": "This", "IS": "is", "A": "more", "HEADER": "content"}]
    assert expected == result

    # Test explicit None as header delimiter, different from content delimiter
    result = parse_delimited_table(TABLE2, delim='|', header_delim=None)
    assert isinstance(result, list)
    assert len(result) == 2
    assert isinstance(result[0], dict)
    expected = [{"SID": "HA2", "Nr": "16", "Instance": "D16", "SAPLOCALHOST": "lu0417",
                 "Version": "749, patch 10, changelist 1698137",
                 "DIR_EXECUTABLE": "/usr/sap/HA2/D16/exe"},
                {"SID": "HA2", "Nr": "22", "Instance": "D22", "SAPLOCALHOST": "lu0417",
                 "Version": "749, patch 10, changelist 1698137",
                 "DIR_EXECUTABLE": "/usr/sap/HA2/D22/exe"}]
    assert expected == result


DATA_LIST = [
    {'name': 'test 1', 'role': 'server', 'memory_gb': 16, 'ssd': True},
    {'name': 'test 2', 'role': 'server', 'memory_gb': 256, 'ssd': False},
    {'name': 'test 3', 'role': 'server', 'memory_gb': 16, 'ssd': False},
    {'name': 'test 4', 'role': 'embedded', 'memory_gb': 1, 'ssd': False},
    {'name': 'test 5', 'role': 'workstation', 'memory_gb': 16, 'ssd': True},
]

CERT_LIST = [
    {
        'status': 'MONITORING',
        'stuck': 'no',
        'key pair storage': "type=NSSDB,location='/etc/dirsrv/slapd-LDAP-EXAMPLE-COM',nickname='Server-Cert',token='NSS Certificate DB',pinfile='/etc/dirsrv/slapd-LDAP-EXAMPLE-COM/pwdfile.txt'",
        'certificate': {
            'type': 'NSSDB',
            'location': '/etc/dirsrv/slapd-LDAP-EXAMPLE-COM',
            'nickname': 'Server-Cert',
            'token': 'NSS Certificate DB',
        },
        'CA': 'IPA',
        'issuer': 'CN=Certificate Authority,O=LDAP.EXAMPLE.COM',
        'subject': 'CN=master.LDAP.EXAMPLE.COM,O=LDAP.EXAMPLE.COM',
        'expires': '2017-06-28 12:52:12 UTC',
        'eku': 'id-kp-serverAuth,id-kp-clientAuth',
        'pre-save command': '',
        'post-save command': '/usr/lib64/ipa/certmonger/restart_dirsrv LDAP-EXAMPLE-COM',
        'track': 'yes',
        'auto-renew': 'yes',
    }, {
        'status': 'MONITORING',
        'stuck': 'no',
        'key pair storage': "type=NSSDB,location='/etc/dirsrv/slapd-PKI-IPA',nickname='Server-Cert',token='NSS Certificate DB',pinfile='/etc/dirsrv/slapd-PKI-IPA/pwdfile.txt'",
        'certificate': {
            'type': 'NSSDB',
            'location': '/etc/dirsrv/slapd-PKI-IPA',
            'nickname': 'Server-Cert',
            'token': 'NSS Certificate DB',
        },
        'CA': 'IPA',
        'issuer': 'CN=Certificate Authority,O=EXAMPLE.COM',
        'subject': 'CN=ldap.EXAMPLE.COM,O=EXAMPLE.COM',
        'expires': '2017-06-28 12:52:13 UTC',
        'eku': 'id-kp-serverAuth,id-kp-clientAuth',
        'pre-save command': '',
        'post-save command': '/usr/lib64/ipa/certmonger/restart_dirsrv PKI-IPA',
        'track': 'yes',
        'auto-renew': 'yes',
        'dash- space': 'tested',
    }
]


def test_keyword_search():
    # No keywords, no result
    assert len(keyword_search(DATA_LIST)) == 0
    # Search on absent keywords produces empty list
    assert keyword_search(DATA_LIST, cpu_count=4) == []
    # Search on present but non-matching keyword produces empty list
    assert keyword_search(DATA_LIST, memory_gb=8) == []
    # Single result - search on string
    results = keyword_search(DATA_LIST, role='embedded')
    assert len(results) == 1
    assert results[0] == DATA_LIST[3]
    # Multiple results, name has underscore - search on integer
    results = keyword_search(DATA_LIST, memory_gb=16)
    assert len(results) == 3
    assert results == [DATA_LIST[i] for i in (0, 2, 4)]
    # Search on boolean
    results = keyword_search(DATA_LIST, ssd=False)
    assert len(results) == 3
    assert results == [DATA_LIST[i] for i in (1, 2, 3)]
    # No data, no results.
    assert len(keyword_search([], role='server')) == 0

    # Search with contains
    results = keyword_search(DATA_LIST, role__contains='e')
    assert len(results) == 4
    assert results == [DATA_LIST[i] for i in (0, 1, 2, 3)]

    # Search with startswith
    results = keyword_search(DATA_LIST, role__startswith='e')
    assert len(results) == 1
    assert results[0] == DATA_LIST[3]

    # Search for multiple keys, with spaces and dashes, and search operators
    results = keyword_search(
        CERT_LIST,
        pre_save_command='',
        key_pair_storage__startswith="type=NSSDB,location='/etc/dirsrv/slapd-PKI-IPA'"
    )
    assert len(results) == 1
    assert results[0] == CERT_LIST[1]

    # Make sure contains can also apply to keys with dashes and spaces
    results = keyword_search(
        CERT_LIST,
        post_save_command__contains='PKI-IPA',
    )
    assert len(results) == 1
    assert results[0] == CERT_LIST[1]

    # Lower case value matching
    results = keyword_search(
        CERT_LIST,
        status__lower_value='Monitoring',
    )
    assert len(results) == 2
    assert results == CERT_LIST

    # Check that searches for keys with two underscores that aren't matcher
    # suffixes still work
    results = keyword_search(
        CERT_LIST,
        dash__space='tested',
    )
    assert len(results) == 1
    assert results[0] == CERT_LIST[1]

    # Check that we can use contains to check the contents of a dictionary
    # in a value
    results = keyword_search(
        CERT_LIST,
        certificate__contains='type'
    )
    assert len(results) == 2
    assert results == CERT_LIST
    assert keyword_search(
        CERT_LIST,
        certificate__contains='encryption'
    ) == []


def test_parse_exception():
    with pytest.raises(ParseException) as e_info:
        raise ParseException('This is a parse exception')
    assert 'This is a parse exception' == str(e_info.value)


def test_skip_exception():
    with pytest.raises(SkipException) as e_info:
        raise SkipException('This is a skip exception')
    assert 'This is a skip exception' == str(e_info.value)
