Add simple context method

lib/main.js

@@ -97,6 +97,16 @@ Lambda.prototype._runHandler = (handler, event, program, context) => {
     return timeout - (currentTime - startTime)
   }
 
+  // The following three functions are deprecated in AWS Lambda.
+  // Since it is sometimes used by other SDK,
+  // it is a simple one that does not result in `not function` error
+  context.succeed = (result) => console.log(JSON.stringify(result))
+  context.fail = (error) => console.log(JSON.stringify(error))
+  context.done = (error, results) => {
+    console.log(JSON.stringify(error))
+    console.log(JSON.stringify(results))
+  }
+
   handler(event, context, callback)
 }
 

test/main.js

@@ -135,6 +135,18 @@ describe('lib/main', function () {
     })
   })
 
+  describe('_runHandler', () => {
+    it('context methods is a function', (done) => {
+      const handler = (event, context, callback) => {
+        assert.isFunction(context.succeed)
+        assert.isFunction(context.fail)
+        assert.isFunction(context.done)
+        done()
+      }
+      lambda._runHandler(handler, {}, program, {})
+    })
+  })
+
   describe('_params', function () {
     // http://docs.aws.amazon.com/lambda/latest/dg/API_CreateFunction.html#SSS-CreateFunction-request-FunctionName
     const functionNamePattern =