public void SetValueShouldAppendAssignment()
{
// Arrange
IQueryable <TestClass> queryable = new List <TestClass>().AsQueryable();
var statementBuilder = new UpdateStatementBuilder <TestClass>(queryable);
// Act
statementBuilder.SetValue(s => s.Id, 3);
// Assert
Assert.Single(statementBuilder.Assignements);
MemberAssignment assignment = statementBuilder.Assignements.Single();
Assert.Same(typeof(TestClass).GetProperty(nameof(TestClass.Id)), assignment.Member);
Assert.IsAssignableFrom <ConstantExpression>(assignment.Expression);
var constantExpression = assignment.Expression as ConstantExpression;
Assert.IsType <int>(constantExpression.Value);
Assert.Equal(3, constantExpression.Value);
}
public void SetValueShouldAppendIncreaseAssignment()
{
// Arrange
IQueryable <TestClass> queryable = new List <TestClass>().AsQueryable();
var statementBuilder = new UpdateStatementBuilder <TestClass>(queryable);
PropertyInfo propertyToAssign = typeof(TestClass).GetProperty(nameof(TestClass.Id));
// Act
statementBuilder.SetValue(s => s.Id, s => s.Id + 3);
// Assert
Assert.Single(statementBuilder.Assignements);
MemberAssignment assignment = statementBuilder.Assignements.Single();
Assert.Same(propertyToAssign, assignment.Member);
Assert.IsAssignableFrom <BinaryExpression>(assignment.Expression);
var binaryExpression = assignment.Expression as BinaryExpression;
Assert.IsAssignableFrom <MemberExpression>(binaryExpression.Left);
Assert.IsAssignableFrom <ConstantExpression>(binaryExpression.Right);
var memberExpression = binaryExpression.Left as MemberExpression;
Assert.Same(propertyToAssign, memberExpression.Member);
Assert.Equal(ExpressionType.Add, binaryExpression.NodeType);
var constantExpression = binaryExpression.Right as ConstantExpression;
Assert.IsType <int>(constantExpression.Value);
Assert.Equal(3, constantExpression.Value);
}
