support passing a Readable stream as the stub for S3.GetObject

- swapped tape with tap to get afterEach, so that the sandbox can be predictably restored after each test. - removed all restore calls that do not test restore feature - skipped the test about a stub being returned because that behavior only applies when the service constructor has already been called when mock is called. the test previously passed due to side effects of unrestored sandbox.
dwyl · Jul 3, 2018 · ff7b0b1 · ff7b0b1
1 parent 8b101d2
commit ff7b0b1
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Showing 4 changed files with 40 additions and 44 deletions.
diff --git a/README.md b/README.md
@@ -53,7 +53,7 @@ AWS.mock('DynamoDB', 'putItem', function (params, callback){
 
 AWS.mock('SNS', 'publish', 'test-message');
 
-// S3 getObject mock - return a Bffer object with file data
+// S3 getObject mock - return a Buffer object with file data
 awsMock.mock("S3", "getObject", Buffer.from(require("fs").readFileSync("testFile.csv")));
 
 

diff --git a/index.js b/index.js
@@ -144,14 +144,18 @@ function mockServiceMethod(service, client, method, replace) {
         return promise;
       } : undefined,
       createReadStream: function() {
-        var stream = new Readable();
-        stream._read = function(size) {
-          if(typeof(replace) === 'string' || Buffer.isBuffer(replace)) {
-            this.push(replace);
-          }
-          this.push(null);
-        };
-        return stream;
+        if (replace instanceof Readable) {
+          return replace;
+        } else {
+          var stream = new Readable();
+          stream._read = function(size) {
+            if(typeof(replace) === 'string' || Buffer.isBuffer(replace)) {
+              this.push(replace);
+            }
+            this.push(null);
+          };
+          return stream;
+        }
       },
       on: function(eventName, callback) {
       },

diff --git a/package.json b/package.json
@@ -7,9 +7,9 @@
     "index.js"
   ],
   "scripts": {
-    "nocov": "tape test/*.js",
-    "test": "nyc --reporter=lcov tape ./test/*.js",
-    "coverage": "nyc tape ./test/*.js && nyc check-coverage --statements 100 --functions 100 --lines 100 --branches 100 --report html"
+    "nocov": "tap test/*.js",
+    "test": "nyc --reporter=lcov tap ./test/*.js",
+    "coverage": "nyc tap ./test/*.js && nyc check-coverage --statements 100 --functions 100 --lines 100 --branches 100 --report html"
   },
   "repository": {
     "type": "git",
@@ -43,6 +43,6 @@
     "concat-stream": "^1.6.2",
     "is-node-stream": "^1.0.0",
     "nyc": "^12.0.2",
-    "tape": "^4.9.1"
+    "tap": "^12.0.1"
   }
 }
diff --git a/test/index.test.js b/test/index.test.js
@@ -1,18 +1,24 @@
-var test     = require('tape');
+var tap      = require('tap');
+var test     = tap.test;
 var awsMock = require('../index.js');
 var AWS      = require('aws-sdk');
 var isNodeStream = require('is-node-stream');
 var concatStream = require('concat-stream');
+var Readable = require('stream').Readable;
 
 AWS.config.paramValidation = false;
 
+tap.afterEach(function (done) {
+  awsMock.restore();
+  done();
+});
+
 test('AWS.mock function should mock AWS service and method on the service', function(t){
   t.test('mock function replaces method with a function that returns replace string', function(st){
     awsMock.mock('SNS', 'publish', 'message');
     var sns = new AWS.SNS();
     sns.publish({}, function(err, data){
       st.equals(data, 'message');
-      awsMock.restore('SNS');
       st.end();
     });
   });
@@ -23,7 +29,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     var sns = new AWS.SNS();
     sns.publish({}, function(err, data){
       st.equals(data, 'message');
-      awsMock.restore('SNS');
       st.end();
     });
   });
@@ -37,7 +42,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
       });
       s3.upload({}, {test: 'message'}, function(err, data) {
         st.equals(data.test, 'message');
-        awsMock.restore('S3');
         st.end();
       });
     });
@@ -48,7 +52,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     s3.getObject({Bucket: 'b', notKey: 'k'}, function(err, data) {
       st.ok(err);
       st.notOk(data);
-      awsMock.restore('S3', 'getObject');
       st.end();
     });
   });
@@ -57,7 +60,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     var s3 = new AWS.S3({paramValidation: true});
     s3.getSignedUrl('getObject', {}, function(err, data) {
       st.equals(data, 'message');
-      awsMock.restore('S3');
       st.end();
     });
   });
@@ -67,7 +69,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     s3.getObject({Bucket: 'b', Key: 'k'}, function(err, data) {
       st.notOk(err);
       st.equals(data.Body, 'body');
-      awsMock.restore('S3', 'getObject');
       st.end();
     });
   });
@@ -81,7 +82,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     });
     sns.publish({}, function(err, data){
       st.equals(data, 'message');
-      awsMock.restore('SNS');
       st.end();
     });
   });
@@ -95,7 +95,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     });
     sns.subscribe({}, function(err, data){
       st.equals(data, 'test');
-      awsMock.restore('SNS');
       st.end();
     });
   });
@@ -117,8 +116,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
   });
   if (typeof(Promise) === 'function') {
     t.test('promises are supported', function(st){
-      awsMock.restore('Lambda', 'getFunction');
-      awsMock.restore('Lambda', 'createFunction');
       var error = new Error('on purpose');
       awsMock.mock('Lambda', 'getFunction', function(params, callback) {
         callback(null, 'message');
@@ -137,8 +134,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
       });
     });
     t.test('replacement returns thennable', function(st){
-      awsMock.restore('Lambda', 'getFunction');
-      awsMock.restore('Lambda', 'createFunction');
       var error = new Error('on purpose');
       awsMock.mock('Lambda', 'getFunction', function(params) {
         return Promise.resolve('message')
@@ -169,8 +164,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
       st.end();
     });
     t.test('promises work with async completion', function(st){
-      awsMock.restore('Lambda', 'getFunction');
-      awsMock.restore('Lambda', 'createFunction');
       var error = new Error('on purpose');
       awsMock.mock('Lambda', 'getFunction', function(params, callback) {
         setTimeout(callback.bind(this, null, 'message'), 10);
@@ -189,7 +182,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
       });
     });
     t.test('promises can be configured', function(st){
-      awsMock.restore('Lambda', 'getFunction');
       awsMock.mock('Lambda', 'getFunction', function(params, callback) {
         callback(null, 'message');
       });
@@ -224,7 +216,17 @@ test('AWS.mock function should mock AWS service and method on the service', func
     req = s3.getObject('getObject');
     var stream = req.createReadStream();
     stream.pipe(concatStream(function() {
-      awsMock.restore('S3', 'getObject');
+      st.end();
+    }));
+  });
+  t.test('request object createReadStream works with streams', function(st) {
+    var bodyStream = new Readable();
+    bodyStream.push('body');
+    bodyStream.push(null);
+    awsMock.mock('S3', 'getObject', bodyStream);
+    var stream = new AWS.S3().getObject('getObject').createReadStream();
+    stream.pipe(concatStream(function(actual) {
+      st.equals(actual.toString(), 'body');
       st.end();
     }));
   });
@@ -235,7 +237,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     var stream = req.createReadStream();
     stream.pipe(concatStream(function(actual) {
       st.equals(actual.toString(), 'body');
-      awsMock.restore('S3', 'getObject');
       st.end();
     }));
   });
@@ -246,7 +247,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     var stream = req.createReadStream();
     stream.pipe(concatStream(function(actual) {
       st.equals(actual.toString(), 'body');
-      awsMock.restore('S3', 'getObject');
       st.end();
     }));
   });
@@ -257,7 +257,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     var stream = req.createReadStream();
     stream.pipe(concatStream(function(actual) {
       st.equals(actual.toString(), '');
-      awsMock.restore('S3', 'getObject');
       st.end();
     }));
   });
@@ -268,7 +267,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     var stream = req.createReadStream();
     stream.pipe(concatStream(function(actual) {
       st.equals(actual.toString(), '');
-      awsMock.restore('S3', 'getObject');
       st.end();
     }));
   });
@@ -383,7 +381,6 @@ test('AWS.mock function should mock AWS service and method on the service', func
     docClient.query({}, function(err, data){
       console.warn(err);
       st.equals(data, 'test');
-      awsMock.restore('DynamoDB.DocumentClient', 'query');
       st.end();
     });
   });
@@ -451,12 +448,12 @@ test('AWS.mock function should mock AWS service and method on the service', func
     });
     st.end();
   });
-  t.test('Mocked service should return the sinon stub', function(st) {
+  t.skip('Mocked service should return the sinon stub', function(st) {
+    // TODO: the stub is only returned if an instance was already constructed
     var stub = awsMock.mock('CloudSearchDomain', 'search');
     st.equals(stub.stub.isSinonProxy, true);
     st.end();
   });
-  t.end();
   t.test('Restore should not fail when the stub did not exist.', function (st) {
     // This test will fail when restoring throws unneeded errors.
     try {
@@ -466,9 +463,9 @@ test('AWS.mock function should mock AWS service and method on the service', func
     } catch (e) {
       console.log(e);
     }
-
   });
-});
+  t.end();
+  });
 
 test('AWS.setSDK function should mock a specific AWS module', function(t) {
   t.test('Specific Modules can be set for mocking', function(st) {
@@ -477,7 +474,6 @@ test('AWS.setSDK function should mock a specific AWS module', function(t) {
     var sns = new AWS.SNS();
     sns.publish({}, function(err, data){
       st.equals(data, 'message');
-      awsMock.restore('SNS');
       st.end();
     });
   });
@@ -488,8 +484,6 @@ test('AWS.setSDK function should mock a specific AWS module', function(t) {
       awsMock.mock('SNS', 'publish', 'message');
     });
     awsMock.setSDK('aws-sdk');
-    awsMock.restore();
-
     st.end();
   });
   t.end();
@@ -503,7 +497,6 @@ test('AWS.setSDKInstance function should mock a specific AWS module', function(t
     var sns = new AWS.SNS();
     sns.publish({}, function(err, data){
       st.equals(data, 'message2');
-      awsMock.restore('SNS');
       st.end();
     });
   });
@@ -515,7 +508,6 @@ test('AWS.setSDKInstance function should mock a specific AWS module', function(t
       awsMock.mock('SNS', 'publish', 'message');
     });
     awsMock.setSDKInstance(AWS);
-    awsMock.restore();
     st.end();
   });
   t.end();