private async _shouldMockModule()

in packages/jest-runtime/src/index.ts [1847:1919]
64 lines of code
16 McCabe index (conditional complexity)

  private async _shouldMockModule(
    from: string,
    moduleName: string,
    explicitShouldMock: Map<string, boolean>,
    options: ResolveModuleConfig,
  ): Promise<boolean> {
    const moduleID = await this._resolver.getModuleIDAsync(
      this._virtualMocks,
      from,
      moduleName,
      options,
    );
    const key = from + path.delimiter + moduleID;

    if (explicitShouldMock.has(moduleID)) {
      // guaranteed by `has` above
      return explicitShouldMock.get(moduleID)!;
    }

    if (
      !this._shouldAutoMock ||
      this._resolver.isCoreModule(moduleName) ||
      this._shouldUnmockTransitiveDependenciesCache.get(key)
    ) {
      return false;
    }

    if (this._shouldMockModuleCache.has(moduleID)) {
      // guaranteed by `has` above
      return this._shouldMockModuleCache.get(moduleID)!;
    }

    let modulePath;
    try {
      modulePath = await this._resolveModule(from, moduleName, options);
    } catch (e) {
      const manualMock = await this._resolver.getMockModuleAsync(
        from,
        moduleName,
      );
      if (manualMock) {
        this._shouldMockModuleCache.set(moduleID, true);
        return true;
      }
      throw e;
    }

    if (this._unmockList && this._unmockList.test(modulePath)) {
      this._shouldMockModuleCache.set(moduleID, false);
      return false;
    }

    // transitive unmocking for package managers that store flat packages (npm3)
    const currentModuleID = await this._resolver.getModuleIDAsync(
      this._virtualMocks,
      from,
      undefined,
      options,
    );
    if (
      this._transitiveShouldMock.get(currentModuleID) === false ||
      (from.includes(NODE_MODULES) &&
        modulePath.includes(NODE_MODULES) &&
        ((this._unmockList && this._unmockList.test(from)) ||
          explicitShouldMock.get(currentModuleID) === false))
    ) {
      this._transitiveShouldMock.set(moduleID, false);
      this._shouldUnmockTransitiveDependenciesCache.set(key, true);
      return false;
    }
    this._shouldMockModuleCache.set(moduleID, true);
    return true;
  }