public void can_find_value_in_an_expression_that_returns_a_dereferenced_value()
{
Assert.Equal(DateTime.MinValue, ValueExtractor.FindValueWithin(GetExpression(() => DateTime.MinValue)));
Assert.Equal(decimal.MinValue, ValueExtractor.FindValueWithin(GetExpression(() => decimal.MinValue)));
Assert.Equal(decimal.MaxValue, ValueExtractor.FindValueWithin(GetExpression(() => decimal.MaxValue)));
Assert.Equal(decimal.MinusOne, ValueExtractor.FindValueWithin(GetExpression(() => decimal.MinusOne)));
}
public void can_find_value_in_an_expression_that_includes_a_lambda()
{
Expression <Func <int, bool> > expression = x => x % 2 == 0;
var value = ValueExtractor.FindValueWithin(expression);
Assert.NotNull(value);
var castValue = Assert.IsType <Func <int, bool> >(value);
Assert.True(castValue(0));
Assert.False(castValue(1));
Assert.True(castValue(2));
Assert.False(castValue(3));
}
public void can_find_value_in_an_expression_that_requires_conversion(long value)
{
Assert.Equal((int)value, ValueExtractor.FindValueWithin(GetExpression(() => (int)value)));
}
public void can_find_value_in_an_expression_that_news_up_an_object()
{
Assert.Equal(new DateTime(1979, 10, 26), ValueExtractor.FindValueWithin(GetExpression(() => new DateTime(1979, 10, 26))));
Assert.Equal(Tuple.Create("one", 1), ValueExtractor.FindValueWithin(GetExpression(() => new Tuple <string, int>("one", 1))));
}
public void can_find_value_in_an_expression_that_creates_an_array(object array)
{
Assert.Equal(array, ValueExtractor.FindValueWithin(GetExpression(() => array)));
}
public void can_find_value_in_an_expression_that_returns_a_local_value(object value)
{
var local = value;
Assert.Equal(value, ValueExtractor.FindValueWithin(GetExpression(() => local)));
}
public void can_find_value_in_an_expression_that_simply_returns_a_constant(object value)
{
Assert.Equal(value, ValueExtractor.FindValueWithin(GetExpression(() => value)));
}
public void can_find_value_in_a_binary_expression()
{
Assert.Equal(7, ValueExtractor.FindValueWithin(GetExpression(() => 3 + 1 + 3)));
Assert.Equal(TimeSpan.FromSeconds(4), ValueExtractor.FindValueWithin(GetExpression(() => TimeSpan.FromSeconds(1) + TimeSpan.FromSeconds(3))));
}
public void can_find_null_in_an_expression()
{
Assert.Null(ValueExtractor.FindValueWithin(GetExpression(() => null)));
}
public void can_find_value_in_a_method_invocation()
{
Assert.Equal(Tuple.Create("one", 1), ValueExtractor.FindValueWithin(GetExpression(() => Tuple.Create("one", 1))));
Assert.Equal(TimeSpan.FromSeconds(1), ValueExtractor.FindValueWithin(GetExpression(() => TimeSpan.FromSeconds(1))));
}