Add tests

jiuaizxc · Jun 4, 2024 · 0ded5de · 0ded5de
1 parent 023c9ae
commit 0ded5de
Showing 1 changed file with 54 additions and 0 deletions.
diff --git a/LiteDB.Tests/Issues/Issue_2458_Tests.cs b/LiteDB.Tests/Issues/Issue_2458_Tests.cs
@@ -0,0 +1,54 @@
+using System;
+using System.IO;
+using Xunit;
+
+namespace LiteDB.Tests.Issues;
+
+public class Issue_2458_Tests
+{
+    [Fact]
+    public void NegativeSeekFails()
+    {
+        using var db = new LiteDatabase(":memory:");
+        var fs = db.FileStorage;
+        AddTestFile("test", 1, fs);
+        using Stream stream = fs.OpenRead("test");
+        Assert.Throws<ArgumentOutOfRangeException>(() => stream.Position = -1);
+    }
+
+    //https://learn.microsoft.com/en-us/dotnet/api/system.io.stream.position?view=net-8.0 says seeking to a position
+    //beyond the end of a stream is supported, so implementations should support it (error on read).
+    [Fact]
+    public void SeekPastFileSucceds()
+    {
+        using var db = new LiteDatabase(":memory:");
+        var fs = db.FileStorage;
+        AddTestFile("test", 1, fs);
+        using Stream stream = fs.OpenRead("test");
+        stream.Position = Int32.MaxValue;
+    }
+
+    [Fact]
+    public void SeekShortChunks()
+    {
+        using var db = new LiteDatabase(":memory:");
+        var fs = db.FileStorage;
+        using(Stream writeStream = fs.OpenWrite("test", "test"))
+        {
+            writeStream.WriteByte(0);
+            writeStream.Flush(); //Create single-byte chunk just containing a 0
+            writeStream.WriteByte(1);
+            writeStream.Flush();
+            writeStream.WriteByte(2);
+        }
+        using Stream readStream = fs.OpenRead("test");
+        readStream.Position = 2;
+        Assert.Equal(2, readStream.ReadByte());
+    }
+
+    private void AddTestFile(string id, long length, ILiteStorage<string> fs)
+    {
+        using Stream writeStream = fs.OpenWrite(id, id);
+        writeStream.Write(new byte[length]);
+    }
+}