feat(instrumenter): harden the instrumenter #2490
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Improve the invalid mutant placement error using `nodePath.buildCodeFrameError`. This: > Stryker Error: Error while placing mutants of type(s) "StringLiteral" on 52:15 with expressionMutantPlacer. TypeError: Property id of DeclareModule expected node to be of a type ["Identifier","StringLiteral"] but instead got "SequenceExpression" Becomes: > SyntaxError: packages/react-devtools-extensions/flow-typed/npm/react-test-renderer_v16.x.x.js:52:15 expressionMutantPlacer could not place mutants with type(s): "StringLiteral". Either remove this file from the list of files to be mutated, or ignore the mutators. Please report this issue at https://github.com/stryker-mutator/stryker/issues/new?assignees=&labels=%F0%9F%90%9B+Bug&template=bug_report.md&title=expressionMutantPlacer%20could%20not%20place%20mutants%20with%20type(s)%3A%20%22StringLiteral%22. > 50 | }; > 51 | > > 52 | declare module 'react-test-renderer' { > | ^^^^^^^^^^^^^^^^^^^^^ > 53 | // eslint-disable-next-line no-inner-declarations > 54 | declare export type ReactTestRenderer = { > 55 | toJSON(): null | ReactTestRendererJSON,
Ignore `declare` syntax in flow and ts files when instrumenting the code. Some examples:
```js
declare module 'react-test-renderer' {
// eslint-disable-next-line no-inner-declarations
}
declare type ReactTestRenderer = {
};
declare type Thenable = {
};
declare function create(
): ReactTestRenderer;
declare function act(callback: () => ?Thenable): Thenable;
declare const foo: string;
declare function bar(): 'bar';
```
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Fixes #2399