add eslint and test

test.js

@@ -0,0 +1,51 @@
+const {test} = require('ava');
+const mock = require('mock-require');
+
+const SCKEY = 'testsckey';
+const SCKEY2 = 'testsckey2';
+const TITLE = 'test for title';
+const MESSAGE = 'test for message';
+
+test('send wechat', async t => {
+  t.plan(2);
+
+  mock('process', {
+    env: {
+      PLUGIN_SCKEY: SCKEY,
+      PLUGIN_TITLE: TITLE,
+      PLUGIN_MESSAGE: MESSAGE
+    }
+  });
+  mock('drone-render', text => {
+    t.is(text, MESSAGE);
+    return text + '1';
+  });
+  mock('request-promise-native', obj => {
+    t.deepEqual(obj, {
+      url: `https://sc.ftqq.com/${SCKEY}.send`,
+      qs: {
+        text: TITLE,
+        desp: MESSAGE + '1'
+      }
+    });
+  });
+
+  mock.reRequire('./index.js');
+  mock.stopAll();
+});
+
+test('send wechat with SERVER_CHAN_KEY', async t => {
+  mock('process', {
+    env: {
+      SERVER_CHAN_KEY: SCKEY2,
+      PLUGIN_TITLE: TITLE,
+      PLUGIN_MESSAGE: MESSAGE
+    }
+  });
+  mock('request-promise-native', obj => {
+    t.is(obj.url, `https://sc.ftqq.com/${SCKEY2}.send`);
+  });
+
+  mock.reRequire('./index.js');
+  mock.stopAll();
+});