fix: follow current spec update

Comparisons relying on order are always False.

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

Author: henryiii

src/packaging/markers.py

@@ -175,12 +175,12 @@ def _format_marker(
 _operators: dict[str, Operator] = {
     "in": lambda lhs, rhs: lhs in rhs,
     "not in": lambda lhs, rhs: lhs not in rhs,
-    "<": operator.lt,
-    "<=": operator.le,
+    "<": lambda _lhs, _rhs: False,
+    "<=": operator.eq,
     "==": operator.eq,
     "!=": operator.ne,
-    ">=": operator.ge,
-    ">": operator.gt,
+    ">=": operator.eq,
+    ">": lambda _lhs, _rhs: False,
 }
 
 

tests/test_markers.py

@@ -80,13 +80,25 @@ def test_base_class(self) -> None:
 
 class TestOperatorEvaluation:
     def test_prefers_pep440(self) -> None:
-        assert Marker('"2.7.9" < python_full_version').evaluate(dict(python_full_version="2.7.10"))
-        assert not Marker('"2.7.9" < python_full_version').evaluate(dict(python_full_version="2.7.8"))
+        assert Marker('"2.7.9" < python_full_version').evaluate(
+            dict(python_full_version="2.7.10")
+        )
+        assert not Marker('"2.7.9" < python_full_version').evaluate(
+            dict(python_full_version="2.7.8")
+        )
 
-    def test_falls_back_to_python(self) -> None:
-        assert Marker('"b" < python_full_version').evaluate(dict(python_full_version="c"))
-        assert not Marker('"b" < python_full_version').evaluate(dict(python_full_version="a"))
-        assert Marker('"b" > "a"').evaluate(dict(a="a"))
+    def test_new_string_rules(self) -> None:
+        assert not Marker('"b" < python_full_version').evaluate(
+            dict(python_full_version="c")
+        )
+        assert not Marker('"b" < python_full_version').evaluate(
+            dict(python_full_version="a")
+        )
+        assert not Marker('"b" > "a"').evaluate(dict(a="a"))
+        assert not Marker('"b" < "a"').evaluate(dict(a="a"))
+        assert not Marker('"b" >= "a"').evaluate(dict(a="a"))
+        assert not Marker('"b" <= "a"').evaluate(dict(a="a"))
+        assert Marker('"a" <= "a"').evaluate(dict(a="a"))
 
     def test_fails_when_undefined(self) -> None:
         with pytest.raises(UndefinedComparison):