Add more tests

modules/__tests__/directoryIndex-test.js

@@ -0,0 +1,34 @@
+import request from 'supertest';
+
+import createServer from '../createServer.js';
+
+describe('A request that targets a directory with a trailing slash', () => {
+  let server;
+  beforeEach(() => {
+    server = createServer();
+  });
+
+  describe('when the directory exists', () => {
+    it('returns an HTML page', done => {
+      request(server)
+        .get('/react@16.8.0/umd/')
+        .end((err, res) => {
+          expect(res.statusCode).toBe(200);
+          expect(res.headers['content-type']).toMatch(/\btext\/html\b/);
+          done();
+        });
+    });
+  });
+
+  describe('when the directory does not exist', () => {
+    it('returns a 404 text error', done => {
+      request(server)
+        .get('/react@16.8.0/not-here/')
+        .end((err, res) => {
+          expect(res.statusCode).toBe(404);
+          expect(res.headers['content-type']).toMatch(/\btext\/plain\b/);
+          done();
+        });
+    });
+  });
+});

modules/__tests__/directoryRedirect-test.js

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+import request from 'supertest';
+
+import createServer from '../createServer.js';
+
+describe('A request for a directory', () => {
+  let server;
+  beforeEach(() => {
+    server = createServer();
+  });
+
+  describe('when a .js file exists with the same name', () => {
+    it('is redirected to the .js file', done => {
+      request(server)
+        .get('/preact@8.4.2/devtools')
+        .end((err, res) => {
+          expect(res.statusCode).toBe(302);
+          expect(res.headers.location).toEqual('/preact@8.4.2/devtools.js');
+          done();
+        });
+    });
+  });
+
+  describe('when a .json file exists with the same name', () => {
+    it('is redirected to the .json file');
+  });
+
+  describe('when it contains an index.js file', () => {
+    it('is redirected to the index.js file', done => {
+      request(server)
+        .get('/preact@8.4.2/src/dom')
+        .end((err, res) => {
+          expect(res.statusCode).toBe(302);
+          expect(res.headers.location).toEqual(
+            '/preact@8.4.2/src/dom/index.js'
+          );
+          done();
+        });
+    });
+  });
+});

modules/__tests__/missingFile-test.js

@@ -0,0 +1,20 @@
+import request from 'supertest';
+
+import createServer from '../createServer.js';
+
+describe('A request for a non-existent file', () => {
+  let server;
+  beforeEach(() => {
+    server = createServer();
+  });
+
+  it('returns a 404 text error', done => {
+    request(server)
+      .get('/preact@8.4.2/not-here.js')
+      .end((err, res) => {
+        expect(res.statusCode).toBe(404);
+        expect(res.headers['content-type']).toMatch(/\btext\/plain\b/);
+        done();
+      });
+  });
+});