Bump attrs requirement from >=17.4.0 to >=19.2.0

This allows us to remove the `ATTRS_EQ_FIELD` thing which is causing
some annoyance.

.github/workflows/main.yml

@@ -79,7 +79,7 @@ jobs:
           - name: "ubuntu-py37"
             python: "3.7"
             os: ubuntu-latest
-            tox_env: "py37-lsof-numpy-oldattrs-pexpect"
+            tox_env: "py37-lsof-numpy-pexpect"
             use_coverage: true
           - name: "ubuntu-py37-pluggy"
             python: "3.7"

changelog/7802.trivial.rst

@@ -0,0 +1 @@
+The ``attrs`` dependency requirement is now >=19.2.0 instead of >=17.4.0.

setup.cfg

@@ -40,7 +40,7 @@ packages =
     _pytest.mark
     pytest
 install_requires =
-    attrs>=17.4.0
+    attrs>=19.2.0
     iniconfig
     packaging
     pluggy>=0.12,<1.0

src/_pytest/_code/code.py

@@ -37,7 +37,6 @@ from _pytest._code.source import Source
 from _pytest._io import TerminalWriter
 from _pytest._io.saferepr import safeformat
 from _pytest._io.saferepr import saferepr
-from _pytest.compat import ATTRS_EQ_FIELD
 from _pytest.compat import final
 from _pytest.compat import get_real_func
 from _pytest.compat import overload
@@ -918,7 +917,7 @@ class FormattedExcinfo:
         return ExceptionChainRepr(repr_chain)
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class TerminalRepr:
     def __str__(self) -> str:
         # FYI this is called from pytest-xdist's serialization of exception
@@ -936,7 +935,7 @@ class TerminalRepr:
 
 
 # This class is abstract -- only subclasses are instantiated.
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ExceptionRepr(TerminalRepr):
     # Provided by subclasses.
     reprcrash = None  # type: Optional[ReprFileLocation]
@@ -954,7 +953,7 @@ class ExceptionRepr(TerminalRepr):
             tw.line(content)
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ExceptionChainRepr(ExceptionRepr):
     chain = attr.ib(
         type=Sequence[
@@ -978,7 +977,7 @@ class ExceptionChainRepr(ExceptionRepr):
         super().toterminal(tw)
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ReprExceptionInfo(ExceptionRepr):
     reprtraceback = attr.ib(type="ReprTraceback")
     reprcrash = attr.ib(type="ReprFileLocation")
@@ -988,7 +987,7 @@ class ReprExceptionInfo(ExceptionRepr):
         super().toterminal(tw)
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ReprTraceback(TerminalRepr):
     reprentries = attr.ib(type=Sequence[Union["ReprEntry", "ReprEntryNative"]])
     extraline = attr.ib(type=Optional[str])
@@ -1022,7 +1021,7 @@ class ReprTracebackNative(ReprTraceback):
         self.extraline = None
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ReprEntryNative(TerminalRepr):
     lines = attr.ib(type=Sequence[str])
     style = "native"  # type: _TracebackStyle
@@ -1031,7 +1030,7 @@ class ReprEntryNative(TerminalRepr):
         tw.write("".join(self.lines))
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ReprEntry(TerminalRepr):
     lines = attr.ib(type=Sequence[str])
     reprfuncargs = attr.ib(type=Optional["ReprFuncArgs"])
@@ -1111,7 +1110,7 @@ class ReprEntry(TerminalRepr):
         )
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ReprFileLocation(TerminalRepr):
     path = attr.ib(type=str, converter=str)
     lineno = attr.ib(type=int)
@@ -1128,7 +1127,7 @@ class ReprFileLocation(TerminalRepr):
         tw.line(":{}: {}".format(self.lineno, msg))
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ReprLocals(TerminalRepr):
     lines = attr.ib(type=Sequence[str])
 
@@ -1137,7 +1136,7 @@ class ReprLocals(TerminalRepr):
             tw.line(indent + line)
 
 
-@attr.s(**{ATTRS_EQ_FIELD: False})  # type: ignore
+@attr.s(eq=False)
 class ReprFuncArgs(TerminalRepr):
     args = attr.ib(type=Sequence[Tuple[str, object]])
 

src/_pytest/assertion/util.py

@@ -16,7 +16,6 @@ from _pytest import outcomes
 from _pytest._io.saferepr import _pformat_dispatch
 from _pytest._io.saferepr import safeformat
 from _pytest._io.saferepr import saferepr
-from _pytest.compat import ATTRS_EQ_FIELD
 
 # The _reprcompare attribute on the util module is used by the new assertion
 # interpretation code and assertion rewriter to detect this plugin was
@@ -420,9 +419,7 @@ def _compare_eq_cls(
         fields_to_check = [field for field, info in all_fields.items() if info.compare]
     elif isattrs(left):
         all_fields = left.__attrs_attrs__
-        fields_to_check = [
-            field.name for field in all_fields if getattr(field, ATTRS_EQ_FIELD)
-        ]
+        fields_to_check = [field.name for field in all_fields if getattr(field, "eq")]
 
     indent = "  "
     same = []

src/_pytest/compat.py

@@ -371,12 +371,6 @@ else:
         return f
 
 
-if getattr(attr, "__version_info__", ()) >= (19, 2):
-    ATTRS_EQ_FIELD = "eq"
-else:
-    ATTRS_EQ_FIELD = "cmp"
-
-
 if sys.version_info >= (3, 8):
     from functools import cached_property as cached_property
 else:

testing/test_assertion.py

@@ -12,7 +12,6 @@ import pytest
 from _pytest import outcomes
 from _pytest.assertion import truncate
 from _pytest.assertion import util
-from _pytest.compat import ATTRS_EQ_FIELD
 
 
 def mock_config(verbose=0):
@@ -945,7 +944,7 @@ class TestAssert_reprcompare_attrsclass:
         @attr.s
         class SimpleDataObject:
             field_a = attr.ib()
-            field_b = attr.ib(**{ATTRS_EQ_FIELD: False})  # type: ignore
+            field_b = attr.ib(eq=False)
 
         left = SimpleDataObject(1, "b")
         right = SimpleDataObject(1, "b")

testing/test_meta.py

@@ -27,8 +27,6 @@ def test_no_warnings(module: str) -> None:
     subprocess.check_call((
         sys.executable,
         "-W", "error",
-        # https://github.com/pytest-dev/pytest/issues/5901
-        "-W", "ignore:The usage of `cmp` is deprecated and will be removed on or after 2021-06-01.  Please use `eq` and `order` instead.:DeprecationWarning",  # noqa: E501
         "-c", "__import__({!r})".format(module),
     ))
     # fmt: on

testing/test_unittest.py

@@ -532,11 +532,7 @@ class TestTrialUnittest:
                 # will crash both at test time and at teardown
         """
         )
-        # Ignore DeprecationWarning (for `cmp`) from attrs through twisted,
-        # for stable test results.
-        result = testdir.runpytest(
-            "-vv", "-oconsole_output_style=classic", "-W", "ignore::DeprecationWarning"
-        )
+        result = testdir.runpytest("-vv", "-oconsole_output_style=classic")
         result.stdout.fnmatch_lines(
             [
                 "test_trial_error.py::TC::test_four FAILED",

tox.ini

@@ -45,8 +45,6 @@ setenv =
 extras = testing
 deps =
     doctesting: PyYAML
-    oldattrs: attrs==17.4.0
-    oldattrs: hypothesis<=4.38.1
     numpy: numpy
     pexpect: pexpect
     pluggymaster: git+https://github.com/pytest-dev/pluggy.git@master