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Matchers

Classes for defining request and response data that is variable.

Attributes

SomethingLike = Like module-attribute

Classes

EachLike(matcher, minimum=1)

Bases: Matcher

Expect the data to be a list of similar objects.

Example:

from pact import Consumer, Provider pact = Consumer('consumer').has_pact_with(Provider('provider')) (pact.given('there are three comments') ... .upon_receiving('a request for the most recent 2 comments') ... .with_request('get', '/comment', query={'limit': 2}) ... .will_respond_with(200, body={ ... 'comments': EachLike( ... {'name': SomethingLike('bob'), ... 'text': SomethingLike('Hello!')}, ... minimum=2) ... })) Would expect the response to be a JSON object, with a comments list. In that list should be at least 2 items, and each item should be a dict with the keys name and text,

:param matcher: The expected value that each item in a list should look like, this can be other matchers. :type matcher: None, list, dict, int, float, str, unicode, Matcher :param minimum: The minimum number of items expected. Must be greater than or equal to 1. :type minimum: int

Source code in src/pact/matchers.py 
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def __init__(self, matcher, minimum=1):
    """
    Create a new EachLike.

    :param matcher: The expected value that each item in a list should
        look like, this can be other matchers.
    :type matcher: None, list, dict, int, float, str, unicode, Matcher
    :param minimum: The minimum number of items expected.
        Must be greater than or equal to 1.
    :type minimum: int
    """
    warnings.warn(
        "This class will be deprecated Pact Python v3 "
        "(see pact-foundation/pact-python#396)",
        PendingDeprecationWarning,
        stacklevel=2,
    )
    self.matcher = matcher
    assert minimum >= 1, 'Minimum must be greater than or equal to 1'
    self.minimum = minimum

Attributes

matcher = matcher instance-attribute
minimum = minimum instance-attribute

Functions

generate()

Generate the value the mock service will return.

:return: A dict containing the information about the contents of the list and the provided minimum number of items for that list. :rtype: dict

Source code in src/pact/matchers.py 
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def generate(self):
    """
    Generate the value the mock service will return.

    :return: A dict containing the information about the contents of the
        list and the provided minimum number of items for that list.
    :rtype: dict
    """
    return {
        'json_class': 'Pact::ArrayLike',
        'contents': from_term(self.matcher),
        'min': self.minimum}

Format()

Class of regular expressions for common formats.

Example:

from pact import Consumer, Provider from pact.matchers import Format pact = Consumer('consumer').has_pact_with(Provider('provider')) (pact.given('the current user is logged in as tester') ... .upon_receiving('a request for the user profile') ... .with_request('get', '/profile') ... .will_respond_with(200, body={ ... 'id': Format().identifier, ... 'lastUpdated': Format().time ... }))

Would expect id to be any valid int and lastUpdated to be a valid time. When the consumer runs this contract, the value of that will be returned is the second value passed to Term in the given function, for the time example it would be datetime.datetime(2000, 2, 1, 12, 30, 0, 0).time()

Source code in src/pact/matchers.py 
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def __init__(self):
    """Create a new Formatter."""
    warnings.warn(
        "This class will be deprecated Pact Python v3 "
        "(see pact-foundation/pact-python#396)",
        PendingDeprecationWarning,
        stacklevel=2,
    )
    self.identifier = self.integer_or_identifier()
    self.integer = self.integer_or_identifier()
    self.decimal = self.decimal()
    self.ip_address = self.ip_address()
    self.hexadecimal = self.hexadecimal()
    self.ipv6_address = self.ipv6_address()
    self.uuid = self.uuid()
    self.timestamp = self.timestamp()
    self.date = self.date()
    self.time = self.time()
    self.iso_datetime = self.iso_8601_datetime()
    self.iso_datetime_ms = self.iso_8601_datetime(with_ms=True)

Attributes

identifier = self.integer_or_identifier() instance-attribute
integer = self.integer_or_identifier() instance-attribute
iso_datetime = self.iso_8601_datetime() instance-attribute
iso_datetime_ms = self.iso_8601_datetime(with_ms=True) instance-attribute

Classes

Regexes

Bases: Enum

Regex Enum for common formats.

Attributes
date = '^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))?)' class-attribute instance-attribute
hexadecimal = '[0-9a-fA-F]+' class-attribute instance-attribute
ip_address = '(\\d{1,3}\\.)+\\d{1,3}' class-attribute instance-attribute
ipv6_address = '(\\A([0-9a-f]{1,4}:){1,1}(:[0-9a-f]{1,4}){1,6}\\Z)|(\\A([0-9a-f]{1,4}:){1,2}(:[0-9a-f]{1,4}){1,5}\\Z)|(\\A([0-9a-f]{1,4}:){1,3}(:[0-9a-f]{1,4}){1,4}\\Z)|(\\A([0-9a-f]{1,4}:){1,4}(:[0-9a-f]{1,4}){1,3}\\Z)|(\\A([0-9a-f]{1,4}:){1,5}(:[0-9a-f]{1,4}){1,2}\\Z)|(\\A([0-9a-f]{1,4}:){1,6}(:[0-9a-f]{1,4}){1,1}\\Z)|(\\A(([0-9a-f]{1,4}:){1,7}|:):\\Z)|(\\A:(:[0-9a-f]{1,4}){1,7}\\Z)|(\\A((([0-9a-f]{1,4}:){6})(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})\\Z)|(\\A(([0-9a-f]{1,4}:){5}[0-9a-f]{1,4}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})\\Z)|(\\A([0-9a-f]{1,4}:){5}:[0-9a-f]{1,4}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\Z)|(\\A([0-9a-f]{1,4}:){1,1}(:[0-9a-f]{1,4}){1,4}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\Z)|(\\A([0-9a-f]{1,4}:){1,2}(:[0-9a-f]{1,4}){1,3}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\Z)|(\\A([0-9a-f]{1,4}:){1,3}(:[0-9a-f]{1,4}){1,2}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\Z)|(\\A([0-9a-f]{1,4}:){1,4}(:[0-9a-f]{1,4}){1,1}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\Z)|(\\A(([0-9a-f]{1,4}:){1,5}|:):(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\Z)|(\\A:(:[0-9a-f]{1,4}){1,5}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\Z)' class-attribute instance-attribute
iso_8601_datetime = '^\\d{4}-[01]\\d-[0-3]\\d\\x54[0-2]\\d:[0-6]\\d:[0-6]\\d(?:\\.\\d+)?(?:(?:[+-]\\d\\d:\\d\\d)|\\x5A)?$' class-attribute instance-attribute
iso_8601_datetime_ms = '^\\d{4}-[01]\\d-[0-3]\\d\\x54[0-2]\\d:[0-6]\\d:[0-6]\\d\\.\\d+(?:(?:[+-]\\d\\d:\\d\\d)|\\x5A)?$' class-attribute instance-attribute
time_regex = '^(T\\d\\d:\\d\\d(:\\d\\d)?(\\.\\d+)?(([+-]\\d\\d:\\d\\d)|Z)?)?$' class-attribute instance-attribute
timestamp = '^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$' class-attribute instance-attribute
uuid = '[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}' class-attribute instance-attribute

Functions

date()

Match any date.

:return: a Term object with a date regex. :rtype: Term

Source code in src/pact/matchers.py 
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def date(self):
    """
    Match any date.

    :return: a Term object with a date regex.
    :rtype: Term
    """
    return Term(
        self.Regexes.date.value, datetime.datetime(
            2000, 2, 1, 12, 30, 0, 0
        ).date().isoformat()
    )
decimal()

Match any decimal.

:return: a Like object with a decimal. :rtype: Like

Source code in src/pact/matchers.py 
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def decimal(self):
    """
    Match any decimal.

    :return: a Like object with a decimal.
    :rtype: Like
    """
    return Like(1.0)
hexadecimal()

Match any hexadecimal.

:return: a Term object with a hexdecimal regex. :rtype: Term

Source code in src/pact/matchers.py 
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def hexadecimal(self):
    """
    Match any hexadecimal.

    :return: a Term object with a hexdecimal regex.
    :rtype: Term
    """
    return Term(self.Regexes.hexadecimal.value, '3F')
integer_or_identifier()

Match any integer.

:return: a Like object with an integer. :rtype: Like

Source code in src/pact/matchers.py 
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def integer_or_identifier(self):
    """
    Match any integer.

    :return: a Like object with an integer.
    :rtype: Like
    """
    return Like(1)
ip_address()

Match any ip address.

:return: a Term object with an ip address regex. :rtype: Term

Source code in src/pact/matchers.py 
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def ip_address(self):
    """
    Match any ip address.

    :return: a Term object with an ip address regex.
    :rtype: Term
    """
    return Term(self.Regexes.ip_address.value, '127.0.0.1')
ipv6_address()

Match any ipv6 address.

:return: a Term object with an ipv6 address regex. :rtype: Term

Source code in src/pact/matchers.py 
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def ipv6_address(self):
    """
    Match any ipv6 address.

    :return: a Term object with an ipv6 address regex.
    :rtype: Term
    """
    return Term(self.Regexes.ipv6_address.value, '::ffff:192.0.2.128')
iso_8601_datetime(with_ms=False)

Match a string for a full ISO 8601 Date.

Does not do any sort of date validation, only checks if the string is according to the ISO 8601 spec.

This method differs from :func:~pact.Format.timestamp, :func:~pact.Format.date and :func:~pact.Format.time implementations in that it is more stringent and tests the string for exact match to the ISO 8601 dates format.

Without with_ms will match string containing ISO 8601 formatted dates as stated bellow:

  • 2016-12-15T20:16:01
  • 2010-05-01T01:14:31.876
  • 2016-05-24T15:54:14.00000Z
  • 1994-11-05T08:15:30-05:00
  • 2002-01-31T23:00:00.1234-02:00
  • 1991-02-20T06:35:26.079043+00:00

Otherwise, ONLY dates with milliseconds will match the pattern:

  • 2010-05-01T01:14:31.876
  • 2016-05-24T15:54:14.00000Z
  • 2002-01-31T23:00:00.1234-02:00
  • 1991-02-20T06:35:26.079043+00:00

:param with_ms: Enforcing millisecond precision. :type with_ms: bool :return: a Term object with a date regex. :rtype: Term

Source code in src/pact/matchers.py 
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def iso_8601_datetime(self, with_ms=False):
    """
    Match a string for a full ISO 8601 Date.

    Does not do any sort of date validation, only checks if the string is
    according to the ISO 8601 spec.

    This method differs from :func:`~pact.Format.timestamp`,
    :func:`~pact.Format.date` and :func:`~pact.Format.time` implementations
    in that it is more stringent and tests the string for exact match to
    the ISO 8601 dates format.

    Without `with_ms` will match string containing ISO 8601 formatted dates
    as stated bellow:

    * 2016-12-15T20:16:01
    * 2010-05-01T01:14:31.876
    * 2016-05-24T15:54:14.00000Z
    * 1994-11-05T08:15:30-05:00
    * 2002-01-31T23:00:00.1234-02:00
    * 1991-02-20T06:35:26.079043+00:00

    Otherwise, ONLY dates with milliseconds will match the pattern:

    * 2010-05-01T01:14:31.876
    * 2016-05-24T15:54:14.00000Z
    * 2002-01-31T23:00:00.1234-02:00
    * 1991-02-20T06:35:26.079043+00:00

    :param with_ms: Enforcing millisecond precision.
    :type with_ms: bool
    :return: a Term object with a date regex.
    :rtype: Term
    """
    date = [1991, 2, 20, 6, 35, 26]
    if with_ms:
        matcher = self.Regexes.iso_8601_datetime_ms.value
        date.append(79043)
    else:
        matcher = self.Regexes.iso_8601_datetime.value

    return Term(
        matcher,
        datetime.datetime(*date, tzinfo=datetime.timezone.utc).isoformat()
    )
time()

Match any time.

:return: a Term object with a time regex. :rtype: Term

Source code in src/pact/matchers.py 
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def time(self):
    """
    Match any time.

    :return: a Term object with a time regex.
    :rtype: Term
    """
    return Term(
        self.Regexes.time_regex.value, datetime.datetime(
            2000, 2, 1, 12, 30, 0, 0
        ).time().isoformat()
    )
timestamp()

Match any timestamp.

:return: a Term object with a timestamp regex. :rtype: Term

Source code in src/pact/matchers.py 
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def timestamp(self):
    """
    Match any timestamp.

    :return: a Term object with a timestamp regex.
    :rtype: Term
    """
    return Term(
        self.Regexes.timestamp.value, datetime.datetime(
            2000, 2, 1, 12, 30, 0, 0
        ).isoformat()
    )
uuid()

Match any uuid.

:return: a Term object with a uuid regex. :rtype: Term

Source code in src/pact/matchers.py 
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def uuid(self):
    """
    Match any uuid.

    :return: a Term object with a uuid regex.
    :rtype: Term
    """
    return Term(
        self.Regexes.uuid.value, 'fc763eba-0905-41c5-a27f-3934ab26786c'
    )

Like(matcher)

Bases: Matcher

Expect the type of the value to be the same as matcher.

Example:

from pact import Consumer, Provider pact = Consumer('consumer').has_pact_with(Provider('provider')) (pact ... .given('there is a random number generator') ... .upon_receiving('a request for a random number') ... .with_request('get', '/generate-number') ... .will_respond_with(200, body={ ... 'number': Like(1111222233334444) ... }))

Would expect the response body to be a JSON object, containing the key number, which would contain an integer. When the consumer runs this contract, the value 1111222233334444 will be returned by the mock service, instead of a randomly generated value.

:param matcher: The object that should be expected. The mock service will return this value. When verified against the provider, the type of this value will be asserted, while the value will be ignored. :type matcher: None, list, dict, int, float, str, unicode, Matcher

Source code in src/pact/matchers.py 
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def __init__(self, matcher):
    """
    Create a new SomethingLike.

    :param matcher: The object that should be expected. The mock service
        will return this value. When verified against the provider, the
        type of this value will be asserted, while the value will be
        ignored.
    :type matcher: None, list, dict, int, float, str, unicode, Matcher
    """
    warnings.warn(
        "This class will be deprecated Pact Python v3 "
        "(see pact-foundation/pact-python#396)",
        PendingDeprecationWarning,
        stacklevel=2,
    )
    valid_types = (
        type(None), list, dict, int, float, six.string_types, Matcher)

    assert isinstance(matcher, valid_types), (
        "matcher must be one of '{}', got '{}'".format(
            valid_types, type(matcher)))

    self.matcher = matcher

Attributes

matcher = matcher instance-attribute

Functions

generate()

Return the value that should be used in the request/response.

:return: A dict containing the information about what the contents of the response should be. :rtype: dict

Source code in src/pact/matchers.py 
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def generate(self):
    """
    Return the value that should be used in the request/response.

    :return: A dict containing the information about what the contents of
        the response should be.
    :rtype: dict
    """
    return {
        'json_class': 'Pact::SomethingLike',
        'contents': from_term(self.matcher)}

Matcher

Bases: object

Base class for defining complex contract expectations.

Functions

generate()

Get the value that the mock service should use for this Matcher.

:rtype: any

Source code in src/pact/matchers.py 
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def generate(self):
    """
    Get the value that the mock service should use for this Matcher.

    :rtype: any
    """
    raise NotImplementedError

Term(matcher, generate)

Bases: Matcher

Expect the response to match a specified regular expression.

Example:

from pact import Consumer, Provider pact = Consumer('consumer').has_pact_with(Provider('provider')) (pact.given('the current user is logged in as tester') ... .upon_receiving('a request for the user profile') ... .with_request('get', '/profile') ... .will_respond_with(200, body={ ... 'name': 'tester', ... 'theme': Term('light|dark|legacy', 'dark') ... }))

Would expect the response body to be a JSON object, containing the key name, which will contain the value tester, and theme which must be one of the values: light, dark, or legacy. When the consumer runs this contract, the value dark will be returned by the mock service.

:param matcher: A regular expression to find. :type matcher: basestring :param generate: A value to be returned by the mock service when generating the response to the consumer. :type generate: basestring

Source code in src/pact/matchers.py 
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def __init__(self, matcher, generate):
    """
    Create a new Term.

    :param matcher: A regular expression to find.
    :type matcher: basestring
    :param generate: A value to be returned by the mock service when
        generating the response to the consumer.
    :type generate: basestring
    """
    warnings.warn(
        "This class will be deprecated Pact Python v3 "
        "(see pact-foundation/pact-python#396)",
        PendingDeprecationWarning,
        stacklevel=2,
    )
    self.matcher = matcher
    self._generate = generate

Attributes

matcher = matcher instance-attribute

Functions

generate()

Return the value that should be used in the request/response.

:return: A dict containing the information about what the contents of the response should be, and what should match for the requests. :rtype: dict

Source code in src/pact/matchers.py 
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def generate(self):
    """
    Return the value that should be used in the request/response.

    :return: A dict containing the information about what the contents of
        the response should be, and what should match for the requests.
    :rtype: dict
    """
    return {
        'json_class': 'Pact::Term',
        'data': {
            'generate': self._generate,
            'matcher': {
                'json_class': 'Regexp',
                'o': 0,
                's': self.matcher}}}

Functions

from_term(term)

Parse the provided term into the JSON for the mock service.

:param term: The term to be parsed. :type term: None, list, dict, int, float, str, bytes, unicode, Matcher :return: The JSON representation for this term. :rtype: dict, list, str

Source code in src/pact/matchers.py 
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def from_term(term):
    """
    Parse the provided term into the JSON for the mock service.

    :param term: The term to be parsed.
    :type term: None, list, dict, int, float, str, bytes, unicode, Matcher
    :return: The JSON representation for this term.
    :rtype: dict, list, str
    """
    warnings.warn(
        "This function will be deprecated Pact Python v3 "
        "(see pact-foundation/pact-python#396)",
        PendingDeprecationWarning,
        stacklevel=2,
    )
    if term is None:
        return term
    elif isinstance(term, (six.string_types, six.binary_type, int, float)):
        return term
    elif isinstance(term, dict):
        return {k: from_term(v) for k, v in term.items()}
    elif isinstance(term, list):
        return [from_term(t) for i, t in enumerate(term)]
    elif issubclass(term.__class__, (Matcher,)):
        return term.generate()
    else:
        raise ValueError('Unknown type: %s' % type(term))

get_generated_values(input)

Resolve (nested) Matchers to their generated values for assertion.

:param input: The input to be resolved to its generated values. :type input: None, list, dict, int, float, bool, str, unicode, Matcher :return: The input resolved to its generated value(s) :rtype: None, list, dict, int, float, bool, str, unicode, Matcher

Source code in src/pact/matchers.py 
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def get_generated_values(input):
    """
    Resolve (nested) Matchers to their generated values for assertion.

    :param input: The input to be resolved to its generated values.
    :type input: None, list, dict, int, float, bool, str, unicode, Matcher
    :return: The input resolved to its generated value(s)
    :rtype: None, list, dict, int, float, bool, str, unicode, Matcher
    """
    warnings.warn(
        "This function will be deprecated Pact Python v3 "
        "(see pact-foundation/pact-python#396)",
        PendingDeprecationWarning,
        stacklevel=2,
    )
    if input is None:
        return input
    if isinstance(input, (six.string_types, int, float, bool)):
        return input
    if isinstance(input, dict):
        return {k: get_generated_values(v) for k, v in input.items()}
    if isinstance(input, list):
        return [get_generated_values(t) for i, t in enumerate(input)]
    elif isinstance(input, Like):
        return get_generated_values(input.matcher)
    elif isinstance(input, EachLike):
        return [get_generated_values(input.matcher)] * input.minimum
    elif isinstance(input, Term):
        return input.generate()['data']['generate']
    else:
        raise ValueError('Unknown type: %s' % type(input))