koobas.hobune.stream
Cannot read past end of stream, MemoryStream
I have this test:
[Test]
public void FileOpenTest_ ()
{
// arrange
ISaveLoadGameData slgdStub = Substitute.For<SaveLoadGameDataStub>();
// act
GameData data = slgdStub.FileOpen();
// assert
Assert.AreEqual(data.experience, GameDataDefaults.DEFAULT_EXPERIENCE);
}
public GameData FileOpen ()
{
bf = new BinaryFormatter();
ms = DefaultsGameDataStream();
data = (GameData)bf.Deserialize(ms);
ms.Close();
return data;
}
public MemoryStream DefaultsGameDataStream ()
{
MemoryStream defaultsMs = new MemoryStream();
BinaryWriter defaultsBw = new BinaryWriter(defaultsMs);
defaultsBw.Write(GameDataDefaults.DEFAULT_EXPERIENCE);
defaultsBw.Write(GameDataDefaults.DEFAULT_SCORE);
defaultsBw.Write(GameDataDefaults.DEFAULT_WIN_PERCENT);
return defaultsMs;
}
With this error:
FileOpenTest_ (0.14s)
---
System.IO.EndOfStreamException : Failed to read past end of stream.
---
at System.IO.BinaryReader.ReadByte () [0x00047] in /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.IO/BinaryReader.cs:293
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.ReadBinaryHeader (System.IO.BinaryReader reader, System.Boolean& hasHeaders) [0x00000] in /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/BinaryFormatter.cs:267
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.NoCheckDeserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler) [0x00039] in /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/BinaryFormatter.cs:161
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream) [0x00000] in /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/BinaryFormatter.cs:136
at Assets.UnityTestTools.UnitTesting.Editor.AritmetikoUnitTests.Stubs.SaveLoadGameDataStub.FileOpen () [0x00017] in D:\svnrepo\trunk\Aritmetiko\Assets\UnityTestTools\UnitTesting\Editor\AritmetikoUnitTests\Stubs\SaveLoadGameDataStub.cs:208
at Assets.UnityTestTools.UnitTesting.Editor.AritmetikoUnitTests.SaveLoadGameDataTests.FileOpenTest_ () [0x0000c] in D:\svnrepo\trunk\Aritmetiko\Assets\UnityTestTools\UnitTesting\Editor\AritmetikoUnitTests\SaveLoadGameDataTests.cs:429
Not sure why it gives an error. Any ideas?
Best Answer
I rewrote FileOpen() to:
public GameData FileOpen ()
{
bf = new BinaryFormatter();
ms = new MemoryStream(DefaultsGameDataStream());
BinaryReader br = new BinaryReader(ms);
data = new GameData();
data.experience = br.ReadSingle();
data.score = br.ReadSingle();
data.winPercent = br.ReadSingle();
ms.Close();
return data;
}
