public void TestGetValue_Complex() {
var test = new Test1() { Name = "a", A = new Test1.TestA() { Address = "b" } };
//获取表达式的值
Expression<Func<Test1, bool>> expression = t => t.Name == test.Name;
Assert.AreEqual( "a", Lambda.GetValue( expression ), "==test.Name" );
Expression<Func<Test1, bool>> expression2 = t => t.Name == test.A.Address;
Assert.AreEqual( "b", Lambda.GetValue( expression2 ), "==test.A.Address" );
//获取方法的值
Expression<Func<Test1, bool>> expression3 = t => t.Name.Contains( test.Name );
Assert.AreEqual( "a", Lambda.GetValue( expression3 ), "Contains test.Name" );
Expression<Func<Test1, bool>> expression4 = t => t.Name.Contains( test.A.Address );
Assert.AreEqual( "b", Lambda.GetValue( expression4 ), "==test.A.Address" );
}
public void TestGetValue_Enum() {
var test1 = new Test1();
test1.NullableEnumValue = LogType.Error;
//属性为枚举,值为枚举
Expression<Func<Test1, bool>> expression = test => test.EnumValue == LogType.Debug;
Assert.AreEqual( LogType.Debug.Value(), Util.Enum.GetValue< LogType>( Lambda.GetValue( expression )) );
//属性为枚举,值为可空枚举
expression = test => test.EnumValue == test1.NullableEnumValue;
Assert.AreEqual( LogType.Error, Lambda.GetValue( expression ) );
//属性为可空枚举,值为枚举
expression = test => test.NullableEnumValue == LogType.Debug;
Assert.AreEqual( LogType.Debug, Lambda.GetValue( expression ) );
//属性为可空枚举,值为可空枚举
expression = test => test.NullableEnumValue == test1.NullableEnumValue;
Assert.AreEqual( LogType.Error, Lambda.GetValue( expression ) );
//属性为可空枚举,值为null
test1.NullableEnumValue = null;
expression = test => test.NullableEnumValue == test1.NullableEnumValue;
Assert.AreEqual( null, Lambda.GetValue( expression ) );
}
public void TestGetValue_Instance() {
var test = new Test1() { Name = "a", A = new Test1.TestA() { Address = "b", B = new Test1.TestA.TestB() { Name = "c" } } };
//一级属性
Expression<Func<string>> expression = () => test.Name;
Assert.AreEqual( "a", Lambda.GetValue( expression ) );
//二级属性
Expression<Func<string>> expression2 = () => test.A.Address;
Assert.AreEqual( "b", Lambda.GetValue( expression2 ) );
//三级属性
Expression<Func<string>> expression3 = () => test.A.B.Name;
Assert.AreEqual( "c", Lambda.GetValue( expression3 ) );
}