public void TestFromBtoA()
{
var mapper = new ExpressionMapper<TestA, TestB>()
.Map(x => x.AValue1, x => x.BValue1)
.Map(x => x.AValue2, x => x.BValue2);
var testB = new TestB()
{
BValue1 = "TestValue",
BValue2 = 42
};
var testA = mapper.MapBtoA(testB);
Assert.AreEqual("TestValue", testA.AValue1);
Assert.AreEqual(42, testA.AValue2);
}