public void ShouldIncludeAReturnKeywordForACoalesce()
{
var stringVariable1 = Expression.Variable(typeof(string), "myString");
var stringVariable2 = Expression.Variable(typeof(string), "yourString");
var assignStrings = Expression.Assign(stringVariable1, stringVariable2);
var stringEmpty = Expression.Field(null, typeof(string), "Empty");
var variableOrNull = Expression.Coalesce(stringVariable1, stringEmpty);
var coalesceBlock = Expression.Block(assignStrings, variableOrNull);
var translated = ToReadableString(coalesceBlock);
const string EXPECTED = @"
var myString = yourString;
return (myString ?? string.Empty);";
translated.ShouldBe(EXPECTED.TrimStart());
}
public void ShouldTranslateAnIfStatementWithAConditional()
{
var guidVariable = Expression.Variable(typeof(Guid), "guid");
var defaultGuid = Expression.Default(typeof(Guid));
var guidNotDefault = Expression.NotEqual(guidVariable, defaultGuid);
var guidEmpty = Expression.Field(null, typeof(Guid), "Empty");
var guidNotEmpty = Expression.NotEqual(guidVariable, guidEmpty);
var falseConstant = Expression.Constant(false);
var guidNotEmptyOrFalse = Expression.Condition(guidNotDefault, guidNotEmpty, falseConstant);
var writeGuidFun = CreateLambda(() => Console.Write("GUID FUN!"));
var ifNotEmptyThenWrite = Expression.IfThen(guidNotEmptyOrFalse, writeGuidFun.Body);
var translated = ToReadableString(ifNotEmptyThenWrite);
const string EXPECTED = @"
if ((guid != default(Guid)) ? guid != Guid.Empty : false)
{
Console.Write(""GUID FUN!"");
}";
translated.ShouldBe(EXPECTED.TrimStart());
}
