mux-fetch/test/utils/configFactory.test.ts

const { configFactory, DEFAULT_CONFIG, compose } = require("../../src");

describe("configFactory", () => {
  it("base", () => {
    const parmas = configFactory({});

    expect(parmas.prefix).toEqual(DEFAULT_CONFIG.prefix);
    expect(parmas.fetchOption).toEqual(DEFAULT_CONFIG.fetchOption);
    expect(parmas.responseHandle).toEqual(DEFAULT_CONFIG.responseHandle);
    // interceptor 会最后 compose 生成函数
    expect(parmas.interceptor.requestInterceptor).toEqual(
      DEFAULT_CONFIG.interceptor.requestInterceptor
    );
    expect(parmas.interceptor.responseInterceptor).toEqual(
      DEFAULT_CONFIG.interceptor.responseInterceptor
    );
    expect(parmas.interceptor.errorInterceptor).toEqual(
      DEFAULT_CONFIG.interceptor.errorInterceptor
    );
  });

  it("combine", () => {
    const config = {
      prefix: "a",
      fetchOption: {
        a: 1,
        b: 2
      },
      responseHandle: () => 1,
      interceptor: {
        requestInterceptor: [a => a + 1],
        responseInterceptor: [b => b + 2],
        errorInterceptor: [c => c + 2]
      }
    };

    const base = {
      prefix: "b",
      fetchOption: {
        a: 2,
        c: 3
      },
      responseHandle: () => 2,
      interceptor: {
        requestInterceptor: [a => a + 1],
        responseInterceptor: [b => b + 2]
      }
    };
    const parmas = configFactory(config, base);

    // prefix 和 responseHandle 采取覆盖的策略
    // config 优先级最大 ， 其次是 base ，最小的是 default
    expect(parmas.prefix).toEqual(config.prefix);
    expect(parmas.responseHandle()).toEqual(1);

    // fetchOption 采用合并的策略，如果是同名的 key ，后面覆盖前面
    expect(parmas.fetchOption).toEqual({
      a: 1,
      b: 2,
      c: 3
    });
    // interceptor 会全量 compose 生成函数
    expect(parmas.interceptor.requestInterceptor(1)).toEqual(3);
    expect(parmas.interceptor.responseInterceptor(1)).toEqual(5);
    expect(parmas.interceptor.errorInterceptor(1)).toEqual(3);
  });
});