test: remove jest and use egg-bin(mocha) (#1363)

package.json

@@ -4,8 +4,8 @@
   "description": "Koa web app framework",
   "main": "lib/application.js",
   "scripts": {
-    "test": "jest",
-    "test-cov": "jest --coverage --runInBand --forceExit",
+    "test": "egg-bin test test",
+    "test-cov": "egg-bin cov test",
     "lint": "eslint benchmarks lib test",
     "bench": "make -C benchmarks",
     "authors": "git log --format='%aN <%aE>' | sort -u > AUTHORS"
@@ -31,6 +31,7 @@
     "delegates": "^1.0.0",
     "depd": "^1.1.2",
     "destroy": "^1.0.4",
+    "egg-bin": "^4.13.0",
     "error-inject": "^1.0.0",
     "escape-html": "^1.0.3",
     "fresh": "~0.5.2",
@@ -40,6 +41,7 @@
     "koa-compose": "^4.1.0",
     "koa-convert": "^1.2.0",
     "koa-is-json": "^1.0.0",
+    "mm": "^2.5.0",
     "on-finished": "^2.3.0",
     "only": "~0.0.2",
     "parseurl": "^1.3.2",
@@ -53,24 +55,12 @@
     "eslint-config-standard": "^7.0.1",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^2.1.1",
-    "jest": "^20.0.0",
     "supertest": "^3.1.0"
   },
   "engines": {
     "node": "^4.8.4 || ^6.10.1 || ^7.10.1 || >= 8.1.4"
   },
   "files": [
     "lib"
-  ],
-  "jest": {
-    "testMatch": [
-      "**/test/!(helpers)/*.js"
-    ],
-    "coverageReporters": [
-      "text-summary",
-      "lcov"
-    ],
-    "bail": true,
-    "testEnvironment": "node"
-  }
+  ]
 }

test/application/onerror.js

@@ -3,15 +3,10 @@
 
 const assert = require('assert');
 const Koa = require('../..');
+const mm = require('mm');
 
 describe('app.onerror(err)', () => {
-  beforeEach(() => {
-    global.console = jest.genMockFromModule('console');
-  });
-
-  afterEach(() => {
-    global.console = require('console');
-  });
+  afterEach(mm.restore);
 
   it('should throw an error if a non-error is given', () => {
     const app = new Koa();
@@ -27,19 +22,21 @@ describe('app.onerror(err)', () => {
 
     err.status = 404;
 
+    let called = false;
+    mm(console, 'error', () => { called = true; });
     app.onerror(err);
-
-    assert.deepEqual(console.error.mock.calls, []);
+    assert(!called);
   });
 
   it('should do nothing if .silent', () => {
     const app = new Koa();
     app.silent = true;
     const err = new Error();
 
+    let called = false;
+    mm(console, 'error', () => { called = true; });
     app.onerror(err);
-
-    assert.deepEqual(console.error.mock.calls, []);
+    assert(!called);
   });
 
   it('should log the error to stderr', () => {
@@ -49,10 +46,12 @@ describe('app.onerror(err)', () => {
     const err = new Error();
     err.stack = 'Foo';
 
+    let msg = '';
+    mm(console, 'error', input => {
+      if (input) msg = input;
+    });
     app.onerror(err);
-
-    const stderr = console.error.mock.calls.join('\n');
-    assert.deepEqual(stderr, '\n  Foo\n');
+    assert(msg === '  Foo');
   });
 
   it('should use err.toString() instad of err.stack', () => {
@@ -64,7 +63,11 @@ describe('app.onerror(err)', () => {
 
     app.onerror(err);
 
-    const stderr = console.error.mock.calls.join('\n');
-    assert.equal(stderr, '\n  Error: mock stack null\n');
+    let msg = '';
+    mm(console, 'error', input => {
+      if (input) msg = input;
+    });
+    app.onerror(err);
+    assert(msg === '  Error: mock stack null');
   });
 });

test/application/respond.js

@@ -8,14 +8,6 @@ const Koa = require('../..');
 const fs = require('fs');
 
 describe('app.respond', () => {
-  beforeEach(() => {
-    global.console = jest.genMockFromModule('console');
-  });
-
-  afterEach(() => {
-    global.console = require('console');
-  });
-
   describe('when ctx.respond === false', () => {
     it('should function (ctx)', () => {
       const app = new Koa();

test/context/onerror.js

@@ -7,14 +7,6 @@ const Koa = require('../..');
 const context = require('../helpers/context');
 
 describe('ctx.onerror(err)', () => {
-  beforeEach(() => {
-    global.console = jest.genMockFromModule('console');
-  });
-
-  afterEach(() => {
-    global.console = require('console');
-  });
-
   it('should respond', () => {
     const app = new Koa();