/** Languages with path conventions implemented by {@link isTestFile}. */
export declare const TEST_DETECTION_LANGUAGES: ReadonlySet<string>;
export type TestDetectionDecision = 'supported' | 'unsupported';
/** Every language's explicit path-detection decision, derived from this module's rules. */
export declare const TEST_DETECTION_DECISIONS: ReadonlyMap<string, TestDetectionDecision>;
export declare function isTestFile(filePath: string): boolean;
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