Initial commit: add .gitignore and README

.venv/lib/python3.12/site-packages/mypy/test/testexportjson.py

@@ -0,0 +1,70 @@
+"""Test cases for the mypy cache JSON export tool."""
+
+from __future__ import annotations
+
+import json
+import os
+import re
+import sys
+
+from mypy import build
+from mypy.errors import CompileError
+from mypy.exportjson import convert_binary_cache_to_json
+from mypy.modulefinder import BuildSource
+from mypy.options import Options
+from mypy.test.config import test_temp_dir
+from mypy.test.data import DataDrivenTestCase, DataSuite
+from mypy.test.helpers import assert_string_arrays_equal
+
+
+class TypeExportSuite(DataSuite):
+    required_out_section = True
+    files = ["exportjson.test"]
+
+    def run_case(self, testcase: DataDrivenTestCase) -> None:
+        error = False
+        src = "\n".join(testcase.input)
+        try:
+            options = Options()
+            options.use_builtins_fixtures = True
+            options.show_traceback = True
+            options.allow_empty_bodies = True
+            options.fixed_format_cache = True
+            fnam = os.path.join(self.base_path, "main.py")
+            with open(fnam, "w") as f:
+                f.write(src)
+            result = build.build(
+                sources=[BuildSource(fnam, "main")], options=options, alt_lib_path=test_temp_dir
+            )
+            a = result.errors
+            error = bool(a)
+
+            major, minor = sys.version_info[:2]
+            cache_dir = os.path.join(".mypy_cache", f"{major}.{minor}")
+
+            for module in result.files:
+                if module in (
+                    "builtins",
+                    "typing",
+                    "_typeshed",
+                    "__future__",
+                    "typing_extensions",
+                    "sys",
+                ):
+                    continue
+                fnam = os.path.join(cache_dir, f"{module}.data.ff")
+                with open(fnam, "rb") as f:
+                    json_data = convert_binary_cache_to_json(f.read(), implicit_names=False)
+                for line in json.dumps(json_data, indent=4).splitlines():
+                    if '"path": ' in line:
+                        # We source file path is unpredictable, so filter it out
+                        line = re.sub(r'"[^"]+\.pyi?"', "...", line)
+                    assert "ERROR" not in line, line
+                    a.append(line)
+        except CompileError as e:
+            a = e.messages
+            error = True
+        if error or "\n".join(testcase.output).strip() != "<not checked>":
+            assert_string_arrays_equal(
+                testcase.output, a, f"Invalid output ({testcase.file}, line {testcase.line})"
+            )