feat: add SameAs/NotSameAs for file content

[vbreuss]

You can now also verify the file content with regard to another file:

IFileSystem fileSystem = new MockFileSystem();
fileSystem.File.WriteAllText("my-file.txt", "some content");
fileSystem.File.WriteAllText("my-other-file.txt", "SOME CONTENT");
fileSystem.File.WriteAllText("my-third-file.txt", "some other content");

await That(fileSystem).HasFile("my-file.txt").WithContent().SameAs("my-other-file.txt").IgnoringCase();
await That(fileSystem).HasFile("my-file.txt").WithContent().NotSameAs("my-third-file.txt");

---

• Fixes Compare content of two files #8

[github-actions]

🚀 Benchmark Results

Details

BenchmarkDotNet v0.14.0, Ubuntu 24.04.2 LTS (Noble Numbat)

AMD EPYC 7763, 1 CPU, 4 logical and 2 physical cores

.NET SDK 8.0.406

[Host]     : .NET 8.0.13 (8.0.1325.6609), X64 RyuJIT AVX2

DefaultJob : .NET 8.0.13 (8.0.1325.6609), X64 RyuJIT AVX2

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Dummy_aweXpect	5.348 μs	0.0522 μs	0.0488 μs	0.4425	0.0916	7.3 KB

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
82.0% Coverage on New Code
11.9% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

This is addressed in release v0.8.0.