FileStorage SaveObject leaves characters

[garcipat]

When I'm Serializing an object with SaveObjectAsync in a folder where there alrady has been an object serialized, there are leftover characters. The existing content is not cleared.

Example:
First Serializing output:

{"IsAutomaticExportEnabled":true,"DataProvisioning":"DataPointsOnly","SamplingInterval":2}

Second serialization:

{"IsAutomaticExportEnabled":true,"DataProvisioning":"Sampling","SamplingInterval":2}**al":2}**
``

there are leftovers at the end becasue the previous opbject used more characters. Deserializing afterwards crashes then.

Tested with Version 10.7.1 and also the new 11.0.2
Tested with FolderStorage

[niemyjski]

Thanks for reporting this issue, can you please provide a failing test and if a or would be grateful.

[garcipat]

Of course:

public class FileStorageTests
{
    [Fact]
    public async Task SaveObject_ShouldSaveObjectClean()
    {
        using var storage = new FolderFileStorage(new FolderFileStorageOptions() { Folder = "Output" });
        var file = $"test-{Random.Shared.Next()}.json";
        var longTextInstance = new TestClass
        {
            TestProperty = "VeryLongString"
        };

        var shortTextInstance = new TestClass
        {
            TestProperty = "Short"
        };

        await storage.SaveObjectAsync(file, longTextInstance);
        await storage.SaveObjectAsync(file, shortTextInstance);

        var storedTestClass = await storage.GetObjectAsync<TestClass>(file);
    }

    public class TestClass
    {
        public required string TestProperty { get; set; }
    }
}

I have not tested it with other implementations. As a workaround im deleting the existing file before writing the same again.