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* fix(group): detect httpx AsyncClient alias imports * fix(group): anchor httpx dotted imports and skip shadowed aliases Addresses Findings 1-3 of the production-readiness review on PR #1687. - F1: the `(dotted_name (identifier) @module)` capture matches every segment of a dotted module path, so `import package.httpx as hx` and `from package.httpx import AsyncClient` would falsely populate the alias sets. Anchor the check on `moduleNode.parent?.text === 'httpx'` so the full dotted_name must equal `httpx`. - F2: `moduleAliases` and `asyncClientAliases` were file-global and unaware of Python scope. A function-local rebind like `AsyncClient = lambda: MockClient()` left the alias entry intact and any subsequent `client = AsyncClient(); client.get(...)` emitted a false-positive consumer contract. Walk every `(assignment left: (identifier) @name)` whose name matches an alias, record the enclosing function/class scope as poisoned, and skip direct- and module-attribute matches when the call site is inside that scope chain. - F3: extend the existing fixture with dotted-package look-alikes and three local-shadow cases (`shadow_direct_alias`, `shadow_module_alias`, `shadow_direct_context`) and assert the would-be FP contractIds are not emitted. - F6: refresh the module-level docstring to mention the supported import-alias forms and the shadow-exclusion behavior. * refactor(group): tighten httpx alias shadow detection and broaden tests Follow-up addressing the residual review findings on PR #1687. - Replace inline scope-key construction in isAliasShadowed with a getScopeKey call so the two helpers cannot drift apart (M1). - Collapse the double tree traversal in collectHttpxAsyncClients: build one combined alias set and pass it to a single collectAliasShadowScopes call (perf, P2). - Add a `shadowScopeKey` helper that returns the scope a rebind actually shadows under Python LEGB rules: function scope for in-function rebinds, 'module' for top-level rebinds, and `null` for class-body rebinds (class attributes do not shadow bare-name lookups in methods). Removes the previous blanket `scopeKey === 'module'` skip and now correctly poisons module-level rebinds (correctness #1). - Extend `ALIAS_SHADOW_PATTERNS` to cover tuple, list, and pattern_list destructuring targets (correctness #2). - Rename `ALIAS_REBIND_PATTERNS` to `ALIAS_SHADOW_PATTERNS` and update the block comment to say "shadowed" rather than "poisoned" (M4). - Collapse `callScopeKeys` to a single-line return; the dead Set wrap was misleading future readers (M2). Tests: - New negative fixtures for 3-segment dotted import (`import a.b.c.httpx as deep_evil`), relative import (`from .httpx import AsyncClient as rel_evil_async`), tuple destructuring rebind, and an isolated file exercising the module-level rebind path (T1, correctness #2, expanded F2). - New positive fixture confirming that a class-body assignment of `AsyncClient` does NOT poison the surrounding methods. - Add a positive control assertion for `module_direct_client` so the dotted-package negative assertions cannot pass vacuously (T3). --------- Co-authored-by: Gergő Magyar <gergomagyar@icloud.com> Co-authored-by: Test <test@example.com> |
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