atom: implement __eq__() for Blocker and SlotOperator

Allow equivalency test for string arguments, falling back to identity
test for enum args.

Author: radhermit

src/pkgcraft/atom/base.pyx

@@ -213,6 +213,11 @@ class Blocker(IntEnum):
         C.pkgcraft_str_free(c_str)
         return s
 
+    def __eq__(self, object other):
+        if isinstance(other, str):
+            return str(self) == other
+        return self is other
+
 
 class SlotOperator(IntEnum):
     Equal = C.SLOT_OPERATOR_EQUAL
@@ -231,6 +236,11 @@ class SlotOperator(IntEnum):
         C.pkgcraft_str_free(c_str)
         return s
 
+    def __eq__(self, object other):
+        if isinstance(other, str):
+            return str(self) == other
+        return self is other
+
 
 @cython.final
 cdef class Atom(Cpv):

tests/atom/test_base.py

@@ -84,9 +84,11 @@ def test_init(self):
         assert a.category == "cat"
         assert a.package == "pkg"
         assert a.blocker is Blocker.Strong
+        assert a.blocker == "!!"
         assert a.slot == "0"
         assert a.subslot == "2"
         assert a.slot_op is SlotOperator.Equal
+        assert a.slot_op == "="
         assert a.use == ("a", "b", "c")
         assert a.repo == "repo"
         assert a.version == VersionWithOp("=1-r2")