public void StringCompare_GreaterThanNeg1_ReturnsGreaterThanOrEqual()
{
// Arrange
var string1 = Expression.Constant("A");
var string2 = Expression.Constant("B");
BinaryExpression expression = Expression.GreaterThan(
Expression.Call(
typeof(string).GetMethod("Compare", new[] { typeof(string), typeof(string) }),
string1,
string2
),
Expression.Constant(-1));
var transformer = new StringComparisonExpressionTransformer();
// Act
var newExpression = transformer.Transform(expression) as StringComparisonExpression;
// Assert
Assert.NotNull(newExpression);
Assert.AreEqual(ExpressionType.GreaterThanOrEqual, newExpression.Operation);
Assert.AreEqual(string1, newExpression.Left);
Assert.AreEqual(string2, newExpression.Right);
}
public void StringCompare_EqualToNeg1_ReturnsLessThan()
{
// Arrange
var string1 = Expression.Constant("A");
var string2 = Expression.Constant("B");
BinaryExpression expression = Expression.Equal(
Expression.Call(
typeof(string).GetMethod("Compare", new[] { typeof(string), typeof(string) }),
string1,
string2
),
Expression.Constant(-1));
var transformer = new StringComparisonExpressionTransformer();
// Act
var newExpression = transformer.Transform(expression) as StringComparisonExpression;
// Assert
Assert.NotNull(newExpression);
Assert.AreEqual(ExpressionType.LessThan, newExpression.Operation);
Assert.AreEqual(string1, newExpression.Left);
Assert.AreEqual(string2, newExpression.Right);
}
