implement tests

test.js

@@ -13,12 +13,30 @@ var fs = require('fs')
 var test = require('assertit')
 var alwaysThunk = require('./index')
 
-// test('always-thunk:', function () {
-//   // body
-// })
+test('always-thunk:', function () {
+  test('should throw TypeError if not a function given', function (done) {
+    function fixture () {
+      alwaysThunk(12345)
+    }
 
-var readFileSync = alwaysThunk(fs.readFileSync)
-readFileSync('./package.json', 'utf8')(console.log)
-
-var readFile = alwaysThunk(fs.readFile)
-readFile('./package.json', 'utf8')(console.log)
+    test.throws(fixture, TypeError)
+    test.throws(fixture, /always-thunk expect a function/)
+    done()
+  })
+  test('should transform sync function to thunk', function (done) {
+    var readFileSync = alwaysThunk(fs.readFileSync)
+    readFileSync('./package.json', 'utf8')(function (err, res) {
+      test.ifError(err)
+      test.ok(res.indexOf('tunnckoCore/always-thunk') !== -1)
+      done()
+    })
+  })
+  test('should transform asynchronous function to thunk', function (done) {
+    var readFile = alwaysThunk(fs.readFile)
+    readFile('./package.json', 'utf8')(function (err, res) {
+      test.ifError(err)
+      test.ok(res.indexOf('tunnckoCore/always-thunk') !== -1)
+      done()
+    })
+  })
+})