Don't emit unsubscriptable-object for string annotations (#6536)

4 files changed, 27 insertions, 6 deletions

diff --git a/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.py b/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.py
index 5ded73b3d..02cbcf081 100644
--- a/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.py
+++ b/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.py
@@ -4,7 +4,7 @@ In type annotation context, they can be used with postponed evaluation enabled,
 starting with PY37.
 """
 # flake8: noqa
-# pylint: disable=missing-docstring,pointless-statement
+# pylint: disable=missing-docstring,pointless-statement,invalid-name
 # pylint: disable=too-few-public-methods,multiple-statements,line-too-long
 from __future__ import annotations
 
@@ -172,8 +172,18 @@ var_re_Match: re.Match[str]
 # unsubscriptable types
 var_abc_Hashable: collections.abc.Hashable
 var_abc_Sized: collections.abc.Sized
-var_abc_Hashable2: collections.abc.Hashable[int]  # [unsubscriptable-object]
-var_abc_Sized2: collections.abc.Sized[int]  # [unsubscriptable-object]
+var_abc_Hashable2: collections.abc.Hashable[int]  # string annotations aren't checked
+var_abc_Sized2: collections.abc.Sized[int]  # string annotations aren't checked
 
 # subscriptable with Python 3.9
 var_abc_ByteString: collections.abc.ByteString[int]
+
+
+# Generic in type stubs only -> string annotations aren't checked
+class A:
+    ...
+
+var_a1: A[str]  # string annotations aren't checked
+var_a2: "A[str]"  # string annotations aren't checked
+class B(A[str]):  # [unsubscriptable-object]
+    ...
diff --git a/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.txt b/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.txt
index 56eca5192..d481f7ac6 100644
--- a/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.txt
+++ b/tests/functional/g/generic_alias/generic_alias_postponed_evaluation_py37.txt
@@ -52,5 +52,4 @@ abstract-method:107:0:107:21:DerivedMultiple:Method '__len__' is abstract in cla
 abstract-method:112:0:112:24:CustomAbstractCls2:Method '__len__' is abstract in class 'Sized' but is not overridden:UNDEFINED
 unsubscriptable-object:112:48:112:72:CustomAbstractCls2:Value 'collections.abc.Iterable' is unsubscriptable:UNDEFINED
 abstract-method:114:0:114:26:CustomImplementation:Method '__len__' is abstract in class 'Sized' but is not overridden:UNDEFINED
-unsubscriptable-object:175:19:175:43::Value 'collections.abc.Hashable' is unsubscriptable:UNDEFINED
-unsubscriptable-object:176:16:176:37::Value 'collections.abc.Sized' is unsubscriptable:UNDEFINED
+unsubscriptable-object:188:8:188:9:B:Value 'A' is unsubscriptable:UNDEFINED
diff --git a/tests/functional/g/generic_alias/generic_alias_typing.py b/tests/functional/g/generic_alias/generic_alias_typing.py
index 6d114739a..4b9a98a0d 100644
--- a/tests/functional/g/generic_alias/generic_alias_typing.py
+++ b/tests/functional/g/generic_alias/generic_alias_typing.py
@@ -1,6 +1,6 @@
 """Test generic alias support for typing.py types."""
 # flake8: noqa
-# pylint: disable=missing-docstring,pointless-statement
+# pylint: disable=missing-docstring,pointless-statement,invalid-name
 # pylint: disable=too-few-public-methods,multiple-statements,line-too-long, unnecessary-dunder-call
 import abc
 import typing
@@ -139,3 +139,13 @@ var_int: int[int]  # [unsubscriptable-object]
 var_bytestring2: typing.ByteString[int]  # [unsubscriptable-object]
 var_hashable2: typing.Hashable[int]  # [unsubscriptable-object]
 var_sized2: typing.Sized[int]  # [unsubscriptable-object]
+
+
+# Generic in type stubs only -> string annotations aren't checked
+class A:
+    ...
+
+var_a1: A[str]  # [unsubscriptable-object]
+var_a2: "A[str]"  # string annotations aren't checked
+class B(A[str]):  # [unsubscriptable-object]
+    ...
diff --git a/tests/functional/g/generic_alias/generic_alias_typing.txt b/tests/functional/g/generic_alias/generic_alias_typing.txt
index 8ed10fe10..f33f49f91 100644
--- a/tests/functional/g/generic_alias/generic_alias_typing.txt
+++ b/tests/functional/g/generic_alias/generic_alias_typing.txt
@@ -17,3 +17,5 @@ unsubscriptable-object:138:9:138:12::Value 'int' is unsubscriptable:UNDEFINED
 unsubscriptable-object:139:17:139:34::Value 'typing.ByteString' is unsubscriptable:UNDEFINED
 unsubscriptable-object:140:15:140:30::Value 'typing.Hashable' is unsubscriptable:UNDEFINED
 unsubscriptable-object:141:12:141:24::Value 'typing.Sized' is unsubscriptable:UNDEFINED
+unsubscriptable-object:148:8:148:9::Value 'A' is unsubscriptable:UNDEFINED
+unsubscriptable-object:150:8:150:9:B:Value 'A' is unsubscriptable:UNDEFINED