public void Default_Returns_ConstantExpressionWithExpectedValue(Type type, object expectedValue)
{
Expression defaultExpression = ExpressionHelpers.Default(type);
Assert.Equal(ExpressionType.Constant, defaultExpression.NodeType);
Assert.Equal(expectedValue, (defaultExpression as ConstantExpression).Value);
}
public void Default_Returns_CorrectExpression()
{
// Arrange & Act & Assert
Expression expression = ExpressionHelpers.Default(typeof(int));
Assert.Equal(ExpressionType.Constant, expression.NodeType);
ConstantExpression constantExpression = Assert.IsType <ConstantExpression>(expression);
Assert.Equal(0, constantExpression.Value);
Assert.Equal(typeof(int), constantExpression.Type);
// Arrange & Act & Assert
expression = ExpressionHelpers.Default(typeof(ExpressionHelpersTests));
Assert.Equal(ExpressionType.Constant, expression.NodeType);
constantExpression = Assert.IsAssignableFrom <ConstantExpression>(expression);
Assert.Null(constantExpression.Value);
Assert.Equal(typeof(ExpressionHelpersTests), constantExpression.Type);
}