resolve-config.test.js

const { resolve } = require("node:path");
const WebpackCLI = require("../../../packages/webpack-cli/lib/webpack-cli").default;
const arrayConfig = require("./webpack.config.cjs");
const config1 = require("./webpack.config1.cjs");
const config2 = require("./webpack.config2.cjs");
const promiseConfig = require("./webpack.promise.config.cjs");

const cli = new WebpackCLI();

describe("resolveConfig", () => {
  it("should handle merge properly", async () => {
    const result = await cli.loadConfig({
      merge: true,
      config: [resolve(__dirname, "./webpack.config.cjs")],
    });

    const expectedOptions = {
      output: {
        filename: "./dist-commonjs.js",
        libraryTarget: "commonjs",
      },
      entry: "./a.js",
      name: "amd",
      mode: "production",
      devtool: "eval-cheap-module-source-map",
      target: "node",
    };

    expect(result.options).toEqual(expectedOptions);
  });

  it("should return array for multiple config", async () => {
    const result = await cli.loadConfig({
      config: [
        resolve(__dirname, "./webpack.config1.cjs"),
        resolve(__dirname, "./webpack.config2.cjs"),
      ],
    });
    const expectedOptions = [config1, config2];

    expect(result.options).toEqual(expectedOptions);
  });

  it("should return config object for single config", async () => {
    const result = await cli.loadConfig({
      config: [resolve(__dirname, "./webpack.config1.cjs")],
    });

    expect(result.options).toEqual(config1);
  });

  it("should return resolved config object for promise config", async () => {
    const result = await cli.loadConfig({
      config: [resolve(__dirname, "./webpack.promise.config.cjs")],
    });
    const expectedOptions = await promiseConfig();

    expect(result.options).toEqual(expectedOptions);
  });

  it("should handle configs returning different types", async () => {
    const result = await cli.loadConfig({
      config: [
        resolve(__dirname, "./webpack.promise.config.cjs"),
        resolve(__dirname, "./webpack.config.cjs"),
      ],
    });
    const resolvedPromiseConfig = await promiseConfig();
    const expectedOptions = [resolvedPromiseConfig, ...arrayConfig];

    expect(result.options).toEqual(expectedOptions);
  });

  it("should handle different env formats", async () => {
    const result = await cli.loadConfig({
      argv: { env: { test: true, name: "Hisoka" } },
      config: [resolve(__dirname, "./env.webpack.config.cjs")],
    });
    const expectedOptions = { mode: "staging", name: "Hisoka" };

    expect(result.options).toEqual(expectedOptions);
  });
});