Merge pull request #28 from messerli-informatik-ag/custom-stream

Allow custom stream factory in FileOpeningBuilderStub

FileSystem/FileOpeningBuilderStub.cs

@@ -1,9 +1,20 @@
+using System;
 using System.IO;
 
 namespace Messerli.FileSystem
 {
     public sealed class FileOpeningBuilderStub : IFileOpeningBuilder
     {
+        private readonly Func<Stream> _createStream;
+
+        public FileOpeningBuilderStub()
+            : this(CreateMemoryStream)
+        {
+        }
+
+        public FileOpeningBuilderStub(Func<Stream> createStream)
+            => _createStream = createStream;
+
         public IFileOpeningBuilder Create(bool create = true) => this;
 
         public IFileOpeningBuilder Truncate(bool truncate = true) => this;
@@ -16,6 +27,8 @@ public sealed class FileOpeningBuilderStub : IFileOpeningBuilder
 
         public IFileOpeningBuilder CreateNew(bool createNew = true) => this;
 
-        public Stream Open(string path) => new MemoryStream();
+        public Stream Open(string path) => _createStream();
+
+        private static Stream CreateMemoryStream() => new MemoryStream();
     }
 }

FileSystem/FileSystem.csproj

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk; Microsoft.Build.CentralPackageVersions">
     <PropertyGroup>
-        <Version>0.1.6</Version>
+        <Version>0.1.7</Version>
         <RootNamespace>Messerli.FileSystem</RootNamespace>
         <AssemblyName>Messerli.FileSystem</AssemblyName>
     </PropertyGroup>

changelog.md

@@ -23,3 +23,10 @@ Initial release
 ## 0.1.6
 - Add documentation for `IFileOpeningBuilder`.
 - Add stub for `IFileOpeningBuilder`: `FileOpeningBuilderStub`.
+
+## 0.1.7
+- `FileOpeningBuilderStub` now optionally accepts a custom factory for creating a stream:
+   ```csharp
+   using var memoryStream = new MemoryStream();
+   var fileOpeningBuilder = new FileOpeningBuilderStub(memoryStream.Borrow);
+   ```