Revert "parsers.re now does fullmatch."

This reverts commit 18320bb
This reverts commit cc1180d

CHANGES.rst

@@ -5,7 +5,6 @@ Unreleased
 ----------
 - Fix bug where steps without parsers would take precedence over steps with parsers. `#534 <https://github.com/pytest-dev/pytest-bdd/pull/534>`_
 - Step functions can now be decorated multiple times with @given, @when, @then. Previously every decorator would override ``converters`` and ``target_fixture`` every at every application. `#534 <https://github.com/pytest-dev/pytest-bdd/pull/534>`_ `#544 <https://github.com/pytest-dev/pytest-bdd/pull/544>`_ `#525 <https://github.com/pytest-dev/pytest-bdd/issues/525>`_
-- ``parsers.re`` now does a `fullmatch <https://docs.python.org/3/library/re.html#re.fullmatch>`_ instead of a partial match. This is to make it work just like the other parsers, since they don't ignore non-matching characters at the end of the string. `#539 <https://github.com/pytest-dev/pytest-bdd/pull/539>`_
 - Require pytest>=6.2 `#534 <https://github.com/pytest-dev/pytest-bdd/pull/534>`_
 - Using modern way to specify hook options to avoid deprecation warnings with pytest >=7.2.
 - Add generic ``step`` decorator that will be used for all kind of steps `#548 <https://github.com/pytest-dev/pytest-bdd/pull/548>`_

src/pytest_bdd/parsers.py

@@ -42,14 +42,14 @@ def parse_arguments(self, name: str) -> dict[str, str] | None:
 
         :return: `dict` of step arguments
         """
-        match = self.regex.fullmatch(name)
+        match = self.regex.match(name)
         if match is None:
             return None
         return match.groupdict()
 
     def is_matching(self, name: str) -> bool:
         """Match given name with the step name."""
-        return bool(self.regex.fullmatch(name))
+        return bool(self.regex.match(name))
 
 
 class parse(StepParser):

tests/args/regex/test_args.py

@@ -55,59 +55,6 @@ def _(euro, values):
     result.assert_outcomes(passed=1)
 
 
-def test_exact_match(pytester):
-    """Test that parsers.re does an exact match (fullmatch) of the whole string.
-
-    This tests exists because in the past we only used re.match, which only finds a match at the beginning
-    of the string, so if there were any more characters not matching at the end, they were ignored"""
-
-    pytester.makefile(
-        ".feature",
-        arguments=textwrap.dedent(
-            """\
-            Feature: Step arguments
-                Scenario: Every step takes a parameter with the same name
-                    Given I have 2 Euro
-                    # Step that should not be found:
-                    When I pay 1 Euro by mistake
-                    Then I should have 1 Euro left
-            """
-        ),
-    )
-
-    pytester.makepyfile(
-        textwrap.dedent(
-            r"""
-        import pytest
-        from pytest_bdd import parsers, given, when, then, scenarios
-
-        scenarios("arguments.feature")
-
-        @given(parsers.re(r"I have (?P<amount>\d+) Euro"), converters={"amount": int}, target_fixture="wallet")
-        def _(amount):
-            return {"EUR": amount}
-
-
-        # Purposefully using a re that will not match the step "When I pay 1 Euro and 50 cents"
-        @when(parsers.re(r"I pay (?P<amount>\d+) Euro"), converters={"amount": int})
-        def _(amount, wallet):
-            wallet["EUR"] -= amount
-
-
-        @then(parsers.re(r"I should have (?P<amount>\d+) Euro left"), converters={"amount": int})
-        def _(amount, wallet):
-            assert wallet["EUR"] == amount
-
-        """
-        )
-    )
-    result = pytester.runpytest()
-    result.assert_outcomes(failed=1)
-    result.stdout.fnmatch_lines(
-        '*StepDefinitionNotFoundError: Step definition is not found: When "I pay 1 Euro by mistake"*'
-    )
-
-
 def test_argument_in_when(pytester):
     pytester.makefile(
         ".feature",