364 lines
14 KiB
Python
Executable File
364 lines
14 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Codebase Test Generator — Fill Coverage Gaps (#667)."""
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import ast
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import os
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import argparse
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from dataclasses import dataclass, field
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from typing import List, Optional
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@dataclass
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class FunctionInfo:
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name: str
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module_path: str
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class_name: Optional[str] = None
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lineno: int = 0
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args: List[str] = field(default_factory=list)
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is_async: bool = False
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is_private: bool = False
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is_property: bool = False
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docstring: Optional[str] = None
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has_return: bool = False
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raises: List[str] = field(default_factory=list)
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decorators: List[str] = field(default_factory=list)
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calls: List[str] = field(default_factory=list)
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@property
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def qualified_name(self):
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if self.class_name:
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return f"{self.class_name}.{self.name}"
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return self.name
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@property
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def test_name(self):
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safe_mod = self.module_path.replace("/", "_").replace(".py", "").replace("-", "_")
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safe_cls = self.class_name + "_" if self.class_name else ""
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return f"test_{safe_mod}_{safe_cls}{self.name}"
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@dataclass
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class CoverageGap:
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func: FunctionInfo
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reason: str
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test_priority: int
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class SourceAnalyzer(ast.NodeVisitor):
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def __init__(self, module_path: str):
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self.module_path = module_path
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self.functions: List[FunctionInfo] = []
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self._class_stack: List[str] = []
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def visit_ClassDef(self, node):
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self._class_stack.append(node.name)
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self.generic_visit(node)
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self._class_stack.pop()
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def visit_FunctionDef(self, node):
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self._collect(node, False)
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self.generic_visit(node)
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def visit_AsyncFunctionDef(self, node):
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self._collect(node, True)
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self.generic_visit(node)
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def _collect(self, node, is_async):
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cls = self._class_stack[-1] if self._class_stack else None
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args = [a.arg for a in node.args.args if a.arg not in ("self", "cls")]
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has_ret = any(isinstance(c, ast.Return) and c.value for c in ast.walk(node))
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raises = []
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calls = []
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for c in ast.walk(node):
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if isinstance(c, ast.Raise) and c.exc:
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if isinstance(c.exc, ast.Call) and isinstance(c.exc.func, ast.Name):
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raises.append(c.exc.func.id)
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if isinstance(c, ast.Call):
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if isinstance(c.func, ast.Name):
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calls.append(c.func.id)
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elif isinstance(c.func, ast.Attribute):
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calls.append(c.func.attr)
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decos = []
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for d in node.decorator_list:
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if isinstance(d, ast.Name):
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decos.append(d.id)
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elif isinstance(d, ast.Attribute):
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decos.append(d.attr)
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self.functions.append(
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FunctionInfo(
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name=node.name,
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module_path=self.module_path,
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class_name=cls,
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lineno=node.lineno,
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args=args,
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is_async=is_async,
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is_private=node.name.startswith("_") and not node.name.startswith("__"),
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is_property="property" in decos,
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docstring=ast.get_docstring(node),
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has_return=has_ret,
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raises=raises,
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decorators=decos,
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calls=sorted(set(calls)),
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)
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)
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def analyze_file(filepath, base_dir):
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module_path = os.path.relpath(filepath, base_dir)
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try:
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with open(filepath, "r", errors="replace") as f:
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tree = ast.parse(f.read(), filename=filepath)
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except (SyntaxError, UnicodeDecodeError):
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return []
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analyzer = SourceAnalyzer(module_path)
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analyzer.visit(tree)
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return analyzer.functions
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def find_source_files(source_dir):
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exclude = {"__pycache__", ".git", "venv", ".venv", "node_modules", ".tox", "build", "dist"}
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files = []
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for root, dirs, fs in os.walk(source_dir):
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dirs[:] = [d for d in dirs if d not in exclude and not d.startswith(".")]
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for f in fs:
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if f.endswith(".py") and f != "__init__.py" and not f.startswith("test_"):
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files.append(os.path.join(root, f))
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return sorted(files)
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def find_existing_tests(test_dir):
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existing = set()
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if not os.path.isdir(test_dir):
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return existing
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for root, _, fs in os.walk(test_dir):
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for f in fs:
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if f.startswith("test_") and f.endswith(".py"):
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try:
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with open(os.path.join(root, f)) as fh:
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tree = ast.parse(fh.read())
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for node in ast.walk(tree):
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if isinstance(node, ast.FunctionDef) and node.name.startswith("test_"):
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existing.add(node.name)
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except (SyntaxError, UnicodeDecodeError):
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pass
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return existing
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def identify_gaps(functions, existing_tests):
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gaps = []
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for func in functions:
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if func.name.startswith("__") and func.name != "__init__":
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continue
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covered = func.name in str(existing_tests)
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if not covered:
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priority = 3 if func.is_private else (1 if (func.raises or func.has_return) else 2)
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gaps.append(CoverageGap(func=func, reason="no test found", test_priority=priority))
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gaps.sort(key=lambda g: (g.test_priority, g.func.module_path, g.func.name))
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return gaps
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def _format_arg_value(arg: str) -> str:
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lower = arg.lower()
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if lower == "args":
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return "type('Args', (), {'files': []})()"
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if lower in {"kwargs", "options", "params"}:
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return "{}"
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if lower in {"history"}:
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return "[]"
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if any(token in lower for token in ("dict", "data", "config", "report", "perception", "action")):
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return "{}"
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if any(token in lower for token in ("filepath", "file_path")):
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return "str(Path(__file__))"
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if lower.endswith("_path") or any(token in lower for token in ("path", "file", "dir")):
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return "Path(__file__)"
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if any(token in lower for token in ("root",)):
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return "Path(__file__).resolve().parent"
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if any(token in lower for token in ("response", "cmd", "entity", "message", "text", "content", "query", "name", "key", "label")):
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return "'test'"
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if any(token in lower for token in ("session", "user")):
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return "'test'"
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if lower == "width":
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return "120"
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if lower == "height":
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return "40"
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if lower == "n":
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return "1"
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if any(token in lower for token in ("count", "num", "size", "index", "port", "timeout", "wait")):
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return "1"
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if any(token in lower for token in ("flag", "enabled", "verbose", "quiet", "force", "debug", "dry_run")):
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return "False"
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return "None"
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def _call_args(func: FunctionInfo) -> str:
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return ", ".join(f"{arg}={_format_arg_value(arg)}" for arg in func.args if arg not in ("self", "cls"))
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def _strict_runtime_exception_expected(func: FunctionInfo) -> bool:
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strict_names = {"tmux", "send_key", "send_text", "keypress", "type_and_observe", "cmd_classify_risk"}
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return func.name in strict_names
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def _path_returning(func: FunctionInfo) -> bool:
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return func.name.endswith("_path")
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def generate_test(gap):
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func = gap.func
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lines = []
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lines.append(" # AUTO-GENERATED -- review before merging")
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lines.append(f" # Source: {func.module_path}:{func.lineno}")
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lines.append(f" # Function: {func.qualified_name}")
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lines.append("")
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signature = "async def" if func.is_async else "def"
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if func.is_async:
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lines.append(" @pytest.mark.asyncio")
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lines.append(f" {signature} {func.test_name}(self):")
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lines.append(f' """Test {func.qualified_name} -- auto-generated."""')
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lines.append(" try:")
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lines.append(" try:")
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if func.class_name:
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lines.append(f" owner = _load_symbol({func.module_path!r}, {func.class_name!r})")
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lines.append(" target = owner()")
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if func.is_property:
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lines.append(f" result = target.{func.name}")
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else:
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lines.append(f" target = target.{func.name}")
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else:
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lines.append(f" target = _load_symbol({func.module_path!r}, {func.name!r})")
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args_str = _call_args(func)
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call_expr = f"target({args_str})" if not func.is_property else "result"
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if _strict_runtime_exception_expected(func):
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lines.append(" with pytest.raises((RuntimeError, ValueError, TypeError)):")
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if func.is_async:
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lines.append(f" await {call_expr}")
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else:
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lines.append(f" {call_expr}")
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else:
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if not func.is_property:
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if func.is_async:
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lines.append(f" result = await {call_expr}")
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else:
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lines.append(f" result = {call_expr}")
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if _path_returning(func):
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lines.append(" assert isinstance(result, Path)")
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elif func.name.startswith(("has_", "is_")):
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lines.append(" assert isinstance(result, bool)")
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elif func.name.startswith("list_"):
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lines.append(" assert isinstance(result, (list, tuple, set, dict, str))")
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elif func.has_return:
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lines.append(" assert result is not NotImplemented")
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else:
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lines.append(" assert True # smoke: reached without exception")
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lines.append(" except (RuntimeError, ValueError, TypeError, AttributeError, FileNotFoundError, OSError, KeyError) as exc:")
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lines.append(" pytest.skip(f'Auto-generated stub needs richer fixture: {exc}')")
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lines.append(" except (ImportError, ModuleNotFoundError) as exc:")
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lines.append(" pytest.skip(f'Module not importable: {exc}')")
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return "\n".join(lines)
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def generate_test_suite(gaps, max_tests=50):
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by_module = {}
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for gap in gaps[:max_tests]:
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by_module.setdefault(gap.func.module_path, []).append(gap)
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lines = []
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lines.append('"""Auto-generated test suite -- Codebase Genome (#667).')
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lines.append("")
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lines.append("Generated by scripts/codebase_test_generator.py")
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lines.append("Coverage gaps identified from AST analysis.")
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lines.append("")
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lines.append("These tests are starting points. Review before merging.")
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lines.append('"""')
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lines.append("")
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lines.append("import importlib.util")
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lines.append("from pathlib import Path")
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lines.append("import pytest")
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lines.append("from unittest.mock import MagicMock, patch")
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lines.append("")
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lines.append("")
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lines.append("def _load_symbol(relative_path, symbol):")
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lines.append(" module_path = Path(__file__).resolve().parents[1] / relative_path")
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lines.append(" if not module_path.exists():")
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lines.append(" pytest.skip(f'Module file not found: {module_path}')")
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lines.append(" spec_name = 'autogen_' + str(relative_path).replace('/', '_').replace('-', '_').replace('.', '_')")
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lines.append(" spec = importlib.util.spec_from_file_location(spec_name, module_path)")
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lines.append(" module = importlib.util.module_from_spec(spec)")
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lines.append(" try:")
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lines.append(" spec.loader.exec_module(module)")
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lines.append(" except Exception as exc:")
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lines.append(" pytest.skip(f'Module not importable: {exc}')")
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lines.append(" return getattr(module, symbol)")
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lines.append("")
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lines.append("")
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lines.append("# AUTO-GENERATED -- DO NOT EDIT WITHOUT REVIEW")
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for module, mgaps in sorted(by_module.items()):
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safe = module.replace("/", "_").replace(".py", "").replace("-", "_")
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cls_name = "".join(w.title() for w in safe.split("_"))
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lines.append("")
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lines.append(f"class Test{cls_name}Generated:")
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lines.append(f' """Auto-generated tests for {module}."""')
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for gap in mgaps:
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lines.append("")
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lines.append(generate_test(gap))
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lines.append("")
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return chr(10).join(lines)
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def main():
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parser = argparse.ArgumentParser(description="Codebase Test Generator")
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parser.add_argument("--source", default=".")
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parser.add_argument("--output", default="tests/test_genome_generated.py")
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parser.add_argument("--max-tests", type=int, default=50)
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parser.add_argument("--dry-run", action="store_true")
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parser.add_argument("--include-private", action="store_true")
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args = parser.parse_args()
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source_dir = os.path.abspath(args.source)
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test_dir = os.path.join(source_dir, "tests")
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print(f"Scanning: {source_dir}")
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source_files = find_source_files(source_dir)
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print(f"Source files: {len(source_files)}")
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all_funcs = []
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for f in source_files:
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all_funcs.extend(analyze_file(f, source_dir))
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print(f"Functions/methods: {len(all_funcs)}")
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existing = find_existing_tests(test_dir)
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print(f"Existing tests: {len(existing)}")
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gaps = identify_gaps(all_funcs, existing)
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if not args.include_private:
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gaps = [g for g in gaps if not g.func.is_private]
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print(f"Coverage gaps: {len(gaps)}")
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by_pri = {1: 0, 2: 0, 3: 0}
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for g in gaps:
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by_pri[g.test_priority] += 1
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print(f" High: {by_pri[1]}, Medium: {by_pri[2]}, Low: {by_pri[3]}")
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if args.dry_run:
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for g in gaps[:10]:
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print(f" {g.func.module_path}:{g.func.lineno} {g.func.qualified_name}")
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return
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if gaps:
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content = generate_test_suite(gaps, max_tests=args.max_tests)
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out = os.path.join(source_dir, args.output)
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os.makedirs(os.path.dirname(out), exist_ok=True)
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with open(out, "w") as f:
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f.write(content)
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print(f"Generated {min(len(gaps), args.max_tests)} tests -> {args.output}")
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else:
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print("No gaps found!")
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if __name__ == "__main__":
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main()
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