Test for type comment on last line of assignment (#21333)

Depends on mypyc/ast_serialize#57

Author: ilevkivskyi

mypy-requirements.txt

@@ -6,4 +6,4 @@ mypy_extensions>=1.0.0
 pathspec>=1.0.0
 tomli>=1.1.0; python_version<'3.11'
 librt>=0.9.0; platform_python_implementation != 'PyPy'
-ast-serialize>=0.2.0,<1.0.0
+ast-serialize>=0.2.1,<1.0.0

pyproject.toml

@@ -56,7 +56,7 @@ dependencies = [
   "pathspec>=1.0.0",
   "tomli>=1.1.0; python_version<'3.11'",
   "librt>=0.9.0; platform_python_implementation != 'PyPy'",
-  "ast-serialize>=0.2.0,<1.0.0",
+  "ast-serialize>=0.2.1,<1.0.0",
 ]
 dynamic = ["version"]
 

test-data/unit/native-parser.test

@@ -3275,3 +3275,14 @@ MypyFile:1(
     TypeParam(
       *Ts)
     PassStmt:4()))
+
+[case testTypeCommentLastLine]
+d = [
+   # Placeholder for items
+]  # type: list[int]
+[out]
+MypyFile:1(
+  AssignmentStmt:1(
+    NameExpr(d)
+    ListExpr:1()
+    list?[int?]))

test-requirements.txt

@@ -4,7 +4,7 @@
 #
 #    pip-compile --allow-unsafe --output-file=test-requirements.txt --strip-extras test-requirements.in
 #
-ast-serialize==0.2.0
+ast-serialize==0.2.1
     # via -r test-requirements.in
 attrs==25.4.0
     # via -r test-requirements.in