ecassell - Basic Unit Testing exercises

Refactoring/Store.cs

@@ -32,7 +32,7 @@ public void Purchase(string productId, int quantity)
                 throw new OutOfStockException();
             }
 
-            product.Quantity = product.Quantity - quantity+1;
+            product.Quantity = product.Quantity - quantity;
             user.Balance = user.Balance - product.Price * quantity;
 
             dataManager.SaveUser(user);

UnitTestProject/AuthenticatorTests.cs

@@ -0,0 +1,113 @@
+using Newtonsoft.Json;
+using NUnit.Framework;
+using Refactoring;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace UnitTestProject
+{
+    [TestFixture]
+    class AuthenticatorTests
+    {
+        private List<User> users;
+
+        [TestFixtureSetUp]
+        public void Class_Initialize()
+        {
+            users = new List<User>();
+            users.Add(createTestUser("Test1", "", 10));
+            users.Add(createTestUser("Test2", "t2", 20));
+        }
+
+        private User createTestUser(string name, string password, double balance)
+        {
+            User testUser = new User();
+            testUser.Name = name;
+            testUser.Password = password;
+            testUser.Balance = balance;
+
+            return testUser;
+        }
+
+        [Test]
+        public void Test_InitializeWithoutError()
+        {
+            //Arrange
+            //Act
+            Authenticator authenticator = new Authenticator(users);
+
+            //Assert
+            Assert.Pass("No assertion really necessary here");
+        }
+
+        [Test]
+        public void Test_AuthenticateUserSuccessfully()
+        {
+            //Arrange
+            Authenticator authenticator = new Authenticator(users);
+
+            //Act
+            User user = authenticator.Authenticate("Test1", "");
+
+            //Assert
+            Assert.IsTrue(user.Name == "Test1");
+        }
+
+        [Test]
+        public void Test_AuthenticationFailedIfUsernameIncorrect()
+        {
+            //Arrange
+            Authenticator authenticator = new Authenticator(users);
+
+            //Act
+            User user = authenticator.Authenticate("Test3", "");
+
+            //Assert
+            Assert.IsTrue(user == null);
+        }
+
+        [Test]
+        public void Test_AuthenticateUserSuccessfullyWithCorrectPassword()
+        {
+            //Arrange
+            Authenticator authenticator = new Authenticator(users);
+
+            //Act
+            User user = authenticator.Authenticate("Test2", "t2");
+
+            //Assert
+            Assert.IsTrue(user.Name == "Test2");
+        }
+
+        [Test]
+        public void Test_AuthenticationFailedIfPasswordIncorrect()
+        {
+            //Arrange
+            Authenticator authenticator = new Authenticator(users);
+
+            //Act
+            User user = authenticator.Authenticate("Test2", "test22");
+
+            //Assert
+            Assert.IsTrue(user == null);
+        }
+
+        [Test]
+        public void Test_AuthenticationFailedIfUsernameNull()
+        {
+            //Arrange
+            Authenticator authenticator = new Authenticator(users);
+
+            //Act
+            User user = authenticator.Authenticate(null, "");
+
+            //Assert
+            Assert.IsTrue(user == null);
+        }
+
+    }
+}

UnitTestProject/IntegrationTests.cs

@@ -10,7 +10,7 @@
 namespace UnitTestProject
 {
     [TestFixture]
-    //[Ignore("Disable integration tests")]
+    [Ignore("Disable integration tests")]
     public class IntegrationTests
     {
         private List<User> users;

UnitTestProject/StoreTests.cs

@@ -13,6 +13,8 @@ namespace UnitTestProject
     [TestFixture]
     class StoreTests
     {
+        private readonly string TEST_PRODUCT_ID = "1";
+
         private User createTestUser(string name, string password, double balance)
         {
             User testUser = new User();
@@ -34,20 +36,23 @@ private Product createTestProduct(string id, string name, double price, int quan
             return testProduct;
         }
 
-        [Test]
-        public void Test_PurchaseThrowsNoErrorForValidFunds()
+        private Store createTestStoreWithSingleUserAndProduct(double userBalance, double productPrice, int productQuantity)
         {
-            //Arrange
-            const string TEST_PRODUCT_ID = "1";
-
             var users = new List<User>();
-            users.Add(createTestUser("Test User", "", 99.99));
+            users.Add(createTestUser("Test User", "", userBalance));
 
             var products = new List<Product>();
-            products.Add(createTestProduct(TEST_PRODUCT_ID, "Product", 9.99, 10));
+            products.Add(createTestProduct(TEST_PRODUCT_ID, "Product", productPrice, productQuantity));
 
             var dataManager = new DataManager(users, products);
-            var store = new Store(users[0], dataManager);
+
+            return new Store(users[0], dataManager);
+        }
+        [Test]
+        public void Test_PurchaseThrowsNoErrorForValidFunds()
+        {
+            //Arrange
+            var store = createTestStoreWithSingleUserAndProduct(99.99, 9.99, 10);
 
             //Act
             store.Purchase(TEST_PRODUCT_ID, 10);
@@ -60,37 +65,58 @@ public void Test_PurchaseThrowsNoErrorForValidFunds()
         public void Test_PurchaseRemovesProductFromStore()
         {
             //Arrange
+            var users = new List<User>();
+            users.Add(createTestUser("Test User", "", 99.99));
+
+            var products = new List<Product>();
+            products.Add(createTestProduct(TEST_PRODUCT_ID, "Product", 9.99, 10));
 
+            var dataManager = new DataManager(users, products);
+            var store = new Store(users[0], dataManager);
             //Act
+            store.Purchase(TEST_PRODUCT_ID, 9);
 
             //Assert 
             //(choose the appropriate statement(s))
             //Assert.AreEqual(1, products[0].Quantity);
             //Assert.AreSame(1, products[0].Quantity);
-            //Assert.IsTrue(products[0].Quantity == 1);
+            Assert.IsTrue(products[0].Quantity == 1);
         }
 
         [Test]
+        [ExpectedException(typeof(InsufficientFundsException))]
         public void Test_PurchaseThrowsExceptionWhenBalanceIsTooLow()
         {
             //Arrange
-
+            var store = createTestStoreWithSingleUserAndProduct(1.00, 1.01, 10);
+
             //Act
+            store.Purchase(TEST_PRODUCT_ID, 1);
 
             //Assert
+            Assert.Fail("InsufficientFundsException should have been thrown.");
         }
 
         [Test]
         public void Test_PurchaseThrowsExceptionWhenBalanceIsTooLowVersion2()
         {
             //Arrange
+            var store = createTestStoreWithSingleUserAndProduct(1.00, 1.01, 10);
+
+            //Act / Assert
+            Assert.Throws<InsufficientFundsException>(() => store.Purchase(TEST_PRODUCT_ID, 1));            
+        }
 
-            //Act
+        [Test]
+        public void Test_PurchaseThrowsExceptionWhenStockIsTooLow()
+        {
+            //Arrange
+            var store = createTestStoreWithSingleUserAndProduct(10.00, 1.00, 1);
 
-            //Assert
+            //Act / Assert
+            Assert.Throws<OutOfStockException>(() => store.Purchase(TEST_PRODUCT_ID, 2));
         }
 
-
         // THE BELOW CODE IS REQUIRED TO PREVENT THE TESTS FROM MODIFYING THE USERS/PRODUCTS ON FILE
         //  This is not a good unit testing pattern - the unit test dependency on the file system should
         //  actually be broken ... training on how to do this will be coming.

UnitTestProject/UnitTestProject.csproj

@@ -70,6 +70,7 @@
     <Otherwise />
   </Choose>
   <ItemGroup>
+    <Compile Include="AuthenticatorTests.cs" />
     <Compile Include="StoreTests.cs" />
     <Compile Include="IntegrationTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />