humpty/test/getExportsAndCommits.test.js

Makes sure your changelogs mention your breaking changes

import simpleGit from "simple-git";
import basicComponentOld from "./dummy_exports/basic/old";
import basicComponentNew from "./dummy_exports/basic/old";
import {
  entryOld,
  entryNew,
  namedOld,
  namedNew
} from "./inputs/getExportsAndCommits/defaultAndNamed";
import * as defaultAndNamedDeep from "./inputs/getExportsAndCommits/defaultAndNamedDeep";
import * as defaultAndNamedDeep2 from "./inputs/getExportsAndCommits/defaultAndNamedDeep2";

import getExportsAndCommits from "../src/getExportsAndCommits";

describe("getExportsAndCommits()", () => {
  test("single component in root index.js", () => {
    simpleGit.__setCommits__(["commit 1", "commit 2"]);
    simpleGit.__setFiles__({
      aaaaaa: {
        "index.js": basicComponentOld
      },
      ffffff: {
        "index.js": basicComponentNew
      }
    });
    return getExportsAndCommits({
      oldApi: "aaaaaa",
      newApi: "ffffff"
    }).then(result => {
      expect(result.commitMessages).toEqual(["commit 1", "commit 2"]);
      expect(result).toMatchSnapshot();
    });
  });

  test("default component export from index.js + named export from separate file", () => {
    simpleGit.__setCommits__(["commit 1", "commit 2"]);
    simpleGit.__setFiles__({
      aaaaaa: {
        "index.js": entryOld,
        "Dog.js": namedOld
      },
      ffffff: {
        "index.js": entryNew,
        "Dog.js": namedNew
      }
    });
    return getExportsAndCommits({
      oldApi: "aaaaaa",
      newApi: "ffffff"
    }).then(result => {
      expect(result.commitMessages).toEqual(["commit 1", "commit 2"]);
      expect(result.newExports.length).toBe(2);

      expect(result.newExports[0].isDefaultExport).toBe(true);
      expect(result.newExports[0].name).toBe(undefined);
      expect(result.newExports[0].api.props.length).toBe(2);

      expect(result.newExports[1].isDefaultExport).toBe(false);
      expect(result.newExports[1].name).toBe("Dog");
      expect(result.newExports[1].api.props.length).toBe(1);

      expect(result.oldExports.length).toBe(2);
    });
  });

  test("default component export from index.js > intermediary file > named export from separate file", () => {
    simpleGit.__setCommits__(["commit 1", "commit 2"]);
    simpleGit.__setFiles__({
      aaaaaa: {
        "index.js": defaultAndNamedDeep.entryOld,
        "middle/Middle.jsx": defaultAndNamedDeep.middleOld,
        "middle/components/Dog.js": defaultAndNamedDeep.deepOld
      },
      ffffff: {
        "index.js": defaultAndNamedDeep.entryNew,
        "middle/Middle.jsx": defaultAndNamedDeep.middleNew,
        "middle/components/Dog.js": defaultAndNamedDeep.deepNew
      }
    });
    return getExportsAndCommits({
      oldApi: "aaaaaa",
      newApi: "ffffff"
    }).then(result => {
      expect(result.commitMessages).toEqual(["commit 1", "commit 2"]);
      expect(result.newExports.length).toBe(2);

      expect(result.newExports[0].isDefaultExport).toBe(true);
      expect(result.newExports[0].name).toBe(undefined);
      expect(result.newExports[0].api.props.length).toBe(2);

      expect(result.newExports[1].isDefaultExport).toBe(false);
      expect(result.newExports[1].name).toBe("Dog");
      expect(result.newExports[1].api.props.length).toBe(1);

      expect(result.oldExports.length).toBe(2);
    });
  });

  test("default component export from index.js > intermediary file > named export from separate file (variant)", () => {
    simpleGit.__setCommits__(["commit 1", "commit 2"]);
    simpleGit.__setFiles__({
      aaaaaa: {
        "index.js": defaultAndNamedDeep2.entryOld,
        "middle/Middle.jsx": defaultAndNamedDeep2.middleOld,
        "middle/components/Dog.js": defaultAndNamedDeep2.deepOld
      },
      ffffff: {
        "index.js": defaultAndNamedDeep2.entryNew,
        "middle/Middle.jsx": defaultAndNamedDeep2.middleNew,
        "middle/components/Dog.js": defaultAndNamedDeep2.deepNew
      }
    });
    return getExportsAndCommits({
      oldApi: "aaaaaa",
      newApi: "ffffff"
    }).then(result => {
      expect(result.commitMessages).toEqual(["commit 1", "commit 2"]);
      expect(result.newExports.length).toBe(2);

      expect(result.newExports[0].isDefaultExport).toBe(true);
      expect(result.newExports[0].name).toBe(undefined);
      expect(result.newExports[0].api.props.length).toBe(2);

      expect(result.newExports[1].isDefaultExport).toBe(false);
      expect(result.newExports[1].name).toBe("Dog");
      expect(result.newExports[1].api.props.length).toBe(1);

      expect(result.oldExports.length).toBe(2);
    });
  });
});