Add new tests

mypyc/test-data/irbuild-valuetype.test

@@ -0,0 +1,62 @@
+[case testValueTypeBasic]
+from typing import final, Final
+from mypy_extensions import mypyc_attr, i32
+
+@final
+@mypyc_attr(value_type=True)
+class Vector2I:
+    def __init__(self, x: i32) -> None:
+        self.x: Final = x
+
+@final
+class Vector2Ir:
+    def __init__(self, x: i32) -> None:
+        self.x: Final = x
+
+def test_rt() -> None:
+    l1 = [Vector2I(1), Vector2I(1)]  # require boxing
+    l2 = [Vector2Ir(1), Vector2Ir(1)]  # do NOT require boxing
+
+[out]
+def Vector2I.__init__(self, x):
+    self :: __main__.Vector2I
+    x :: i32
+L0:
+    self.x = x
+    return 1
+def Vector2Ir.__init__(self, x):
+    self :: __main__.Vector2Ir
+    x :: i32
+L0:
+    self.x = x
+    return 1
+def test_rt():
+    r0, r1 :: __main__.Vector2I
+    r2 :: list
+    r3, r4 :: object
+    r5 :: ptr
+    l1 :: list
+    r6, r7 :: __main__.Vector2Ir
+    r8 :: list
+    r9 :: ptr
+    l2 :: list
+L0:
+    r0 = Vector2I(1)
+    r1 = Vector2I(1)
+    r2 = PyList_New(2)
+    r3 = box(__main__.Vector2I, r0)
+    r4 = box(__main__.Vector2I, r1)
+    r5 = list_items r2
+    buf_init_item r5, 0, r3
+    buf_init_item r5, 1, r4
+    keep_alive r2
+    l1 = r2
+    r6 = Vector2Ir(1)
+    r7 = Vector2Ir(1)
+    r8 = PyList_New(2)
+    r9 = list_items r8
+    buf_init_item r9, 0, r6
+    buf_init_item r9, 1, r7
+    keep_alive r8
+    l2 = r8
+    return 1

mypyc/test-data/valuetype-errors.test

@@ -0,0 +1,35 @@
+[case testValueTypeNotFinal]
+from mypy_extensions import mypyc_attr
+
+@mypyc_attr(value_type=True)
+class A:
+    pass
+
+[out]
+main:4: error: Value types must be immutable and final
+
+[case testValueTypeHasNotParent]
+from mypy_extensions import mypyc_attr
+from typing import final
+
+class A: pass
+
+@final
+@mypyc_attr(value_type=True)
+class B(A): pass
+
+[out]
+main:8: error: Value types must not inherit from other types
+
+[case testValueTypeForbiddenMethods]
+from typing import final
+from mypy_extensions import mypyc_attr
+
+@final
+@mypyc_attr(value_type=True)
+class A:
+    def __iter__(self) -> None:
+        pass
+
+[out]
+main:7: error: Value types must not define method '__iter__'

mypyc/test/test_irbuild.py

@@ -44,6 +44,7 @@
     "irbuild-i32.test",
     "irbuild-i16.test",
     "irbuild-u8.test",
+    "irbuild-valuetype.test",
     "irbuild-vectorcall.test",
     "irbuild-unreachable.test",
     "irbuild-isinstance.test",
@@ -69,6 +70,7 @@ def run_case(self, testcase: DataDrivenTestCase) -> None:
         if options is None:
             # Skipped test case
             return
+        assert options.experimental_value_types
         with use_custom_builtins(os.path.join(self.data_prefix, ICODE_GEN_BUILTINS), testcase):
             expected_output = remove_comment_lines(testcase.output)
             expected_output = replace_word_size(expected_output)

mypyc/test/test_valuetype.py

@@ -0,0 +1,38 @@
+"""Test runner for value type test cases."""
+
+from __future__ import annotations
+
+from mypy.errors import CompileError
+from mypy.test.config import test_temp_dir
+from mypy.test.data import DataDrivenTestCase
+from mypyc.test.testutil import (
+    MypycDataSuite,
+    build_ir_for_single_file,
+    infer_ir_build_options_from_test_name,
+)
+
+files = ["valuetype-errors.test"]
+
+
+class TestValueTypeCompileErrors(MypycDataSuite):
+    """Negative cases which emit error on compile."""
+
+    files = files
+    base_path = test_temp_dir
+
+    def run_case(self, testcase: DataDrivenTestCase) -> None:
+        """Perform a runtime checking transformation test case."""
+        options = infer_ir_build_options_from_test_name(testcase.name)
+        if options is None:
+            # Skipped test case
+            return
+
+        assert options.experimental_value_types
+        try:
+            build_ir_for_single_file(testcase.input, options)
+        except CompileError as e:
+            actual = "\n".join(e.messages).strip()
+            expected = "\n".join(testcase.output).strip()
+            assert actual == expected
+        else:
+            assert False, "Expected CompileError"