(chocolateyGH-121) specs for Md5HashProvider

src/chocolatey.tests.integration/chocolatey.tests.integration.csproj

@@ -76,6 +76,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="infrastructure\commands\CommandExecutorSpecs.cs" />
+    <Compile Include="infrastructure\cryptography\Md5HashProviderSpecs.cs" />
     <Compile Include="infrastructure\filesystem\DotNetFileSystemSpecs.cs" />
     <Compile Include="MockEventSubscriptionManager.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />

src/chocolatey.tests.integration/infrastructure/cryptography/Md5HashProviderSpecs.cs

@@ -0,0 +1,67 @@
+// Copyright © 2011 - Present RealDimensions Software, LLC
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// 
+// You may obtain a copy of the License at
+// 
+// 	http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+namespace chocolatey.tests.integration.infrastructure.cryptography
+{
+    using System;
+    using System.IO;
+    using System.Reflection;
+    using System.Security.Cryptography;
+    using Should;
+    using chocolatey.infrastructure.cryptography;
+    using chocolatey.infrastructure.filesystem;
+
+    public class Md5HashProviderSpecs
+    {
+        public abstract class Md5HashProviderSpecsBase : TinySpec
+        {
+            protected Md5HashProvider Provider;
+            protected DotNetFileSystem FileSystem;
+            protected string ContextDirectory;
+
+            public override void Context()
+            {
+                FileSystem = new DotNetFileSystem();
+                Provider = new Md5HashProvider(FileSystem);
+                ContextDirectory = FileSystem.combine_paths(FileSystem.get_directory_name(Assembly.GetExecutingAssembly().CodeBase.Replace("file:///", string.Empty)), "context");
+            }
+        }
+
+        public class when_Md5HashProvider_provides_a_hash : Md5HashProviderSpecsBase
+        {
+            private string result;
+            private string filePath;
+
+            public override void Context()
+            {
+                base.Context();
+                filePath = FileSystem.combine_paths(ContextDirectory, "testing.packages.config");
+            }
+
+            public override void Because()
+            {
+                result = Provider.hash_file(filePath);
+            }
+
+            [Fact]
+            public void should_provide_the_correct_hash_based_on_a_checksum()
+            {
+                var expected = BitConverter.ToString(MD5.Create().ComputeHash(File.ReadAllBytes(filePath))).Replace("-", string.Empty);
+
+                result.ShouldEqual(expected);
+            }
+        }
+    }
+}

src/chocolatey.tests/chocolatey.tests.csproj

@@ -82,6 +82,7 @@
     <Compile Include="infrastructure\commands\CommandExecutorSpecs.cs" />
     <Compile Include="infrastructure\commands\PowershellExecutorSpecs.cs" />
     <Compile Include="infrastructure\configuration\ConfigSpecs.cs" />
+    <Compile Include="infrastructure\cryptography\Md5HashProviderSpecs.cs" />
     <Compile Include="infrastructure\events\context\FakeEvent.cs" />
     <Compile Include="infrastructure\events\context\FakeSubscriber.cs" />
     <Compile Include="infrastructure\events\EventSubscriptionManagerSpecs.cs" />

src/chocolatey.tests/infrastructure/cryptography/Md5HashProviderSpecs.cs

@@ -0,0 +1,65 @@
+// Copyright © 2011 - Present RealDimensions Software, LLC
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// 
+// You may obtain a copy of the License at
+// 
+// 	http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+namespace chocolatey.tests.infrastructure.cryptography
+{
+    using System;
+    using System.Security.Cryptography;
+    using Moq;
+    using Should;
+    using chocolatey.infrastructure.cryptography;
+    using chocolatey.infrastructure.filesystem;
+
+    public class Md5HashProviderSpecs
+    {
+        public abstract class Md5HashProviderSpecsBase : TinySpec
+        {
+            protected Md5HashProvider Provider;
+            protected Mock<IFileSystem> FileSystem = new Mock<IFileSystem>();
+
+            public override void Context()
+            {
+                Provider = new Md5HashProvider(FileSystem.Object);
+            }
+        }
+
+        public class when_Md5HashProvider_provides_a_hash : Md5HashProviderSpecsBase
+        {
+            private string result;
+            private string filePath = "c:\\path\\does\\not\\matter.txt";
+            private readonly byte[] byteArray = new byte[] {23, 25, 27};
+
+            public override void Context()
+            {
+                base.Context();
+                FileSystem.Setup(x => x.file_exists(It.IsAny<string>())).Returns(true);
+                FileSystem.Setup(x => x.read_file_bytes(filePath)).Returns(byteArray);
+            }
+
+            public override void Because()
+            {
+                result = Provider.hash_file(filePath);
+            }
+
+            [Fact]
+            public void should_provide_the_correct_hash_based_on_a_checksum()
+            {
+                var expected = BitConverter.ToString(MD5.Create().ComputeHash(byteArray)).Replace("-", string.Empty);
+
+                result.ShouldEqual(expected);
+            }
+        }
+    }
+}