fix: fail to bind ipv6 (#362)

* fix: fail to bind ipv6

fix #361

* add test case

Author: uiolee

lib/server.js

@@ -75,6 +75,10 @@ function formatAddress(ip, port, root) {
     hostname = 'localhost';
   }
 
+  if (hostname.includes(':')) {
+    hostname = `[${hostname}]`;
+  }
+
   const path = root.startsWith('/') ? root : `/${root}`;
   return new URL(`http://${hostname}:${port}${path}`).toString();
 }

test/index.js

@@ -277,6 +277,42 @@ describe('server', () => {
     });
   });
 
+  it('bind ip `::1`', () => {
+    const spy = sinon.spy();
+    const stub = sinon.stub(hexo.log, 'info');
+    stub.callsFake(spy);
+
+    return Promise.using(prepareServer({ip: '::1'}), app => {
+      spy.args[1][1].should.contain('[::1]:4000');
+    }).finally(() => {
+      stub.restore();
+    });
+  });
+
+  it('bind ip `127.0.0.1`', () => {
+    const spy = sinon.spy();
+    const stub = sinon.stub(hexo.log, 'info');
+    stub.callsFake(spy);
+
+    return Promise.using(prepareServer({ip: '127.0.0.1'}), app => {
+      spy.args[1][1].should.contain('127.0.0.1:4000');
+    }).finally(() => {
+      stub.restore();
+    });
+  });
+
+  it('bind ip `localhost`', () => {
+    const spy = sinon.spy();
+    const stub = sinon.stub(hexo.log, 'info');
+    stub.callsFake(spy);
+
+    return Promise.using(prepareServer({ip: 'localhost'}), app => {
+      spy.args[1][1].should.contain('localhost:4000');
+    }).finally(() => {
+      stub.restore();
+    });
+  });
+
   it('static', () => {
     const spy = sinon.spy();
     const stub = sinon.stub(hexo, 'load');