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--- development:testing:sinonjs:start [2019/01/13 12:42] – [Sinon JS] don.lee
+++ development:testing:sinonjs:start [2019/01/13 13:05] (current) – don.lee
@@ Line 1: / Line 1: @@
 ====== Sinon JS ======
+If your test will also involve other 3rd party library, etc. multer. You better also check their own test cases for reference. e.g. https://github.com/expressjs/multer/tree/master/test
 ===== Reference =====
@@ Line 21: / Line 23: @@
   * Replace existing method with stub to avoid actually execute the method
+==== Method 1 ====
+  * define a fake function so that it will call that fake one when call
 <code>
 function fake() {  // a fake function to be called
 }
 const stub = sinon.stub(object, 'method').callFakes(fake) // you could also replace the fake with another real function
 ...
+stub.restore() // remove stub
+expect(stub.callCount).to.be.eql(n) // check if the method is call n times
+</code>
+==== Method 2 ====
+  * define a return value no matter how you call the stub
+<code>
+const stub = sinon.stub(object, 'method').returns(val) // always return same val
+...
+const test = stub()
+expect(test).to.be.eql(val)
+stub.restore() // remove stub
+expect(stub.callCount).to.be.eql(n) // check if the method is call n times
+</code>
+==== Method 3 ====
+  * resolve a promise with same value no matter how you call the stub
+<code>
+const stub = sinon.stub(object, 'method').resolve(val) // always resolve same val
+...
+const test = await stub()
+expect(test).to.be.eql(val)
 stub.restore() // remove stub
 expect(stub.callCount).to.be.eql(n) // check if the method is call n times
 </code>