Function buildPromise

packages/jest-transform/src/__tests__/ScriptTransformer.test.ts:476–505

([returnValue, filePath]: [
      TransformedSource,
      string,
    ])

    ];

    const buildPromise = async ([returnValue, filePath]: [
      TransformedSource,
      string,
    ]): Promise<any> => {
      const processorName = `passthrough-preprocessor${filePath.replaceAll(
        /\.|\//g,
        '-',
      )}`;

      jest.doMock(
        processorName,
        () => ({
          processAsync: jest.fn(),
        }),
        {virtual: true},
      );
      const transformer = require(processorName) as AsyncTransformer;
      jest.mocked(transformer.processAsync).mockResolvedValue(returnValue);

      config = {
        ...config,
        transform: [...incorrectReturnValues, ...correctReturnValues].map(
          ([_, filePath]) => [filePath, processorName, {}],
        ),
      };

      const scriptTransformer = await createScriptTransformer(config);

      return scriptTransformer.transformAsync(filePath, getCoverageOptions());
    };

    const promisesToReject = incorrectReturnValues
      .map(buildPromise)