fix

tests/BuildingBlocks/Common.Tests/Extensions/StreamExtensionsTests.cs

@@ -0,0 +1,84 @@
+using System.Text;
+
+using Common.Extensions;
+
+namespace Common.Tests.Extensions;
+
+public sealed class StreamExtensionsTests
+{
+    [Fact]
+    public static void TestReadBytesWhenStreamIsNull()
+    {
+        using Stream stream = Stream.Null;
+
+        var res = stream.ReadBytes(10);
+
+        Assert.Empty(res);
+    }
+
+    [Fact]
+    public static void TestReadBytesWhenStreamIsNulll()
+    {
+        Stream stream = null!;
+
+        Assert.Throws<ArgumentNullException>(() => stream.ReadBytes(10));
+    }
+
+    [Fact]
+    public static void TestReadBytesWhenCountIsNegative()
+    {
+        using Stream stream = Stream.Null;
+
+        Assert.Throws<ArgumentOutOfRangeException>(() => stream.ReadBytes(-10));
+    }
+
+    [Fact]
+    public static void TestReadBytesWhenCountIsZero()
+    {
+        using Stream stream = Stream.Null;
+
+        var res = stream.ReadBytes(0);
+
+        Assert.Empty(res);
+    }
+
+
+    [Fact]
+    public static void TestWhenStreamIsShorterThanCount()
+    {
+        var data = "test"u8.ToArray();
+        using Stream stream = new MemoryStream(data);
+
+        var res = stream.ReadBytes(1000);
+
+        Assert.NotEmpty(res);
+        Assert.Equal(data.Length, res.Length);
+        Assert.Equal(data, res);
+    }
+
+    [Fact]
+    public static void TestWhenStreamIsEqualCount()
+    {
+        var data = "test"u8.ToArray();
+        using Stream stream = new MemoryStream(data);
+
+        var res = stream.ReadBytes(data.Length);
+
+        Assert.NotEmpty(res);
+        Assert.Equal(data.Length, res.Length);
+        Assert.Equal(data, res);
+    }
+
+    [Fact]
+    public static void TestWhenStreamIsLongerThanCount()
+    {
+        var data = "test jan pawel 3"u8.ToArray();
+        using Stream stream = new MemoryStream(data);
+
+        var res = stream.ReadBytes(data.Length - 1);
+
+        Assert.NotEmpty(res);
+        Assert.Equal(data.Length - 1, res.Length);
+        Assert.NotEqual(data, res);
+    }
+}