public static MergeComparer <MergeTestObject> CreateMerger()
{
var merger = MergeComparer <MergeTestObject> .Create(o => o.ID, true);
merger.MatchAlgorithm.AddMatchEvaluator(Property1Score, o => o.Property1);
merger.MatchAlgorithm.AddMatchEvaluator(Property2Score, o => o.Property2);
merger.MatchAlgorithm.AddMatchEvaluator(Property3Score, o => o.Property3, new SoftStringEqualityComparer(StringComparisonOptions.CaseInsensitive));
return(merger);
}
public void MergeMissing_MergesMissingValue()
{
var comparer = MergeComparer <MergeTestObject> .Create(o => o.ID, true);
var instance1 = new MergeTestObject()
{
Property3 = "foo"
};
var instance2 = new MergeTestObject()
{
Property3 = null
};
comparer.CompareAlgorithm.MergeMissing(instance1, instance2);
Assert.AreEqual(instance1.Property3, instance2.Property3);
Assert.AreEqual("foo", instance1.Property3);
Assert.AreEqual("foo", instance2.Property3);
}
public void Compare_NonSimplePropertiesAreIgnored()
{
var comparer = MergeComparer <MergeTestObjectWithComplexMember> .Create(o => o.ID, true);
var instance1 = new MergeTestObjectWithComplexMember()
{
ComplexMember1 = new MergeTestObject(),
ComplexMember2 = new List <object>(new[] { "foo" })
};
var instance2 = new MergeTestObjectWithComplexMember()
{
ComplexMember1 = new MergeTestObject(),
ComplexMember2 = new List <object>(new[] { "bar" })
};
var conflicts = comparer.CompareAlgorithm.Compare(instance1, instance2);
Assert.AreEqual(0, conflicts.Count());
}
public void MergeMissing_DoesNotOverwriteExistingValue()
{
var comparer = MergeComparer <MergeTestObject> .Create(o => o.ID, true);
var instance1 = new MergeTestObject()
{
Property1 = 1,
Property3 = "foo"
};
var instance2 = new MergeTestObject()
{
Property3 = "bar"
};
comparer.CompareAlgorithm.MergeMissing(instance1, instance2);
Assert.AreNotEqual(instance1.Property3, instance2.Property3);
Assert.AreEqual("foo", instance1.Property3);
Assert.AreEqual("bar", instance2.Property3);
}
static void Main(string[] args)
{
// create two objects with the same key
var key = Guid.NewGuid();
var fromDatabase = new TestObject()
{
Id = key,
Property1 = "foo",
Property2 = 1
};
var fromView = new TestObject()
{
Id = key,
Property1 = "bar",
Property2 = 1
};
// create object that matches TestObject instances on Id things (usually want to make this into a singleton)
var mergeComparer = MergeComparer <TestObject> .Create(o => o.Id, false);
mergeComparer.MatchAlgorithm.AddMatchEvaluator(100, o => o.Id);
// compare the two objects, using the user-supplied input as a source
var results = mergeComparer.Compare(new[] { fromView }, new[] { fromDatabase });
// there should only be one result, since we match on Id
var result = results.Single();
foreach (var conflict in result.Conflicts)
{
// destination is the old value in the database
Console.WriteLine("User changing {0} from {1} to {2}", conflict.PropertyName, conflict.DestinationValue, conflict.SourceValue);
}
WaitForUser();
}
public void MergeAll_OverwritesAllValues()
{
var comparer = MergeComparer <MergeTestObject> .Create(o => o.ID, true);
var instance1 = new MergeTestObject()
{
Property1 = 1,
Property2 = 3,
Property3 = "foo"
};
var instance2 = new MergeTestObject()
{
Property2 = 0,
Property3 = "bar"
};
comparer.CompareAlgorithm.MergeAll(instance1, instance2);
Assert.AreEqual(instance1.Property1, instance2.Property1);
Assert.AreEqual(instance1.Property2, instance2.Property2);
Assert.AreEqual(instance1.Property3, instance2.Property3);
}