public void UseCase()
{
const string PATH = "usecase_test";
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new FilesInFolderEventstore(PATH);
sut.Record(new Increment {
Id = "a"
});
sut.Record(new Increment {
Id = "b"
});
sut.Record(new Increment {
Id = "a"
});
sut.Record(new Decrement {
Id = "b"
}); // 0
sut.Record(new Increment {
Id = "a"
}); // 3
var events = sut.Replay(typeof(Decrement));
Assert.Single(events);
events = sut.Replay(typeof(Increment));
Assert.Equal(4, events.Length);
Assert.Equal(5, sut.Length);
}
public void UseCase_retrieve_with_versions()
{
const string PATH = "usecase_test";
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new FilesInFolderEventstore(PATH);
var resultA = sut.Record(new Version("a"), new Increment {
Id = "a"
});
var resultB = sut.Record(new Version("b"), new Increment {
Id = "b"
});
resultA = sut.Record(resultA.version, new Increment {
Id = "a"
});
resultB = sut.Record(resultB.version, new Decrement {
Id = "b"
});
sut.Record(resultA.version, new Increment {
Id = "a"
});
var result = sut.ReplayWithVersion(MapToVersionId);
Assert.Equal("3", result.versions[0].Number);
Assert.Equal("2", result.versions[1].Number);
string MapToVersionId(Event e) => e switch
{
Increment i => i.Id,
Decrement d => d.Id
};
}
public void UseCase_with_versioning()
{
const string PATH = "usecase_test";
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new FilesInFolderEventstore(PATH);
var resultA = sut.Record(new Version("a"), new Increment {
Id = "a"
});
Assert.Equal("1", resultA.version.Number);
var resultB = sut.Record(new Version("b"), new Increment {
Id = "b"
});
resultA = sut.Record(resultA.version, new Increment {
Id = "a"
});
resultB = sut.Record(resultB.version, new Decrement {
Id = "b"
});
Assert.Equal("2", resultB.version.Number);
sut.Record(resultA.version, new Increment {
Id = "a"
});
var ex = Assert.Throws <InvalidOperationException>(() => sut.Record(resultA.version, new Decrement()
{
Id = "a"
}));
Assert.StartsWith("Expected version", ex.Message);
var version = sut.Version(resultA.version.Id);
Assert.Equal("3", version.Number);
}