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namespace RobloxCS.Tests
{
public class CodeGenerator_Should
{
[Fact]
public void NativeAttribute_GeneratesLuauAttribute()
{
var cleanedLua = GetCleanLua("using Roblox; [Native] void doSomething() { }");
var lines = GetLines(cleanedLua);
var expectedLines = new List<string>
{
"@native",
"local function doSomething(): nil",
"return nil :: any",
"end"
};
AssertEqualLines(lines, expectedLines);
}
[Fact]
public void IfStatements_GeneratesIf()
{
var cleanedLua = GetCleanLua("using static Roblox.Globals; var x = 1; if (x == 4) print(\"x is 4\"); else if (x == \"abc\") print(\"x is abc\"); else print(\"x is unknown\");", 1);
var lines = GetLines(cleanedLua);
var expectedLines = new List<string>
{
"if x == 4 then",
"print(\"x is 4\")",
"elseif x == \"abc\" then",
"print(\"x is abc\")",
"else",
"print(\"x is unknown\")",
"end"
};
AssertEqualLines(lines, expectedLines);
}
[Theory]
[InlineData("var @abc = 1")]
[InlineData("var @hello_brah = 1")]
[InlineData("var @SIGMA = 1")]
public void IdentifierWithAtSymbol_HasAtSymbolRemoved(string expression)
{
var cleanedLua = GetCleanLua(expression);
Assert.Equal(expression.Replace("@", "").Replace("var", "local"), cleanedLua);
}
[Theory]
[InlineData("ToNumber(\"69\")")]
[InlineData("ToFloat(\"69\")")]
[InlineData("ToDouble(\"69\")")]
[InlineData("ToInt(\"69\")")]
[InlineData("ToUInt(\"69\")")]
[InlineData("ToShort(\"69\")")]
[InlineData("ToUShort(\"69\")")]
[InlineData("ToByte(\"69\")")]
[InlineData("ToSByte(\"69\")")]
public void NumberParsingMethods_MacroToToNumber(string methodCall)
{
var cleanedLua = GetCleanLua(methodCall);
Assert.Equal("tonumber(\"69\")", cleanedLua);
}
[Fact]
public void NamespaceDeclaration_GeneratesRuntimeCalls()
{
var cleanedLua = GetCleanLua("namespace Test { }");
var expectedLua = "CS.namespace(\"Test\", @native function(namespace: CS.Namespace)\nend)";
Assert.Equal(expectedLua, cleanedLua);
}
[Fact]
public void NestedNamespaceDeclaration_GeneratesRuntimeCalls()
{
var cleanedLua = GetCleanLua("namespace Test.Nested { }");
var lines = GetLines(cleanedLua);
var expectedLines = new List<string>
{
"CS.namespace(\"Test\", @native function(namespace: CS.Namespace)",
"namespace:namespace(\"Nested\", @native function(namespace: CS.Namespace)",
"end)",
"end)"
};
AssertEqualLines(lines, expectedLines);
}
[Fact]
public void ClassDeclaration_GeneratesRuntimeCalls()
{
var cleanedLua = GetCleanLua("namespace Test { class HelloWorld { } }");
var lines = GetLines(cleanedLua);
var expectedLines = new List<string>
{
"CS.namespace(\"Test\", @native function(namespace: CS.Namespace)",
"namespace:class(\"HelloWorld\", @native function(namespace: CS.Namespace)",
"local class = CS.classDef(\"HelloWorld\", namespace)",
"",
"function class.new()",
"local mt = {}",
"local self = CS.classInstance(class, mt, namespace)",
"",
"",
"return self",
"end",
"",
"return class",
"end)",
"end)"
};
AssertEqualLines(lines, expectedLines);
}
[Theory]
[InlineData("var x = 5;", "local x = 5")]
[InlineData("char f = 'f'", "local f: string = \"f\"")]
[InlineData("object a = 123", "local a: any = 123")]
public void VariableDeclaration_GeneratesLocal(string input, string expected)
{
var cleanedLua = GetCleanLua(input);
Assert.Equal(expected, cleanedLua);
}
[Theory]
[InlineData("(1 + 2) * 4")]
[InlineData("(44 / (4 % 6) * 12) - 2")]
public void Parentheses_GenerateParentheses(string input)
{
var cleanedLua = GetCleanLua(input);
Assert.Equal(input, cleanedLua);
}
[Theory]
[InlineData("69", "69")]
[InlineData("420.0f", "420")]
[InlineData("'h'", "\"h\"")]
[InlineData("\"abcefg\"", "\"abcefg\"")]
[InlineData("true", "true")]
[InlineData("false", "false")]
[InlineData("null", "nil")]
public void Literal_GeneratesLiteral(string input, string expected)
{
var cleanedLua = GetCleanLua(input);
Assert.Equal(expected, cleanedLua);
}
[Fact]
public void StringInterpolation_GeneratesInterpolation()
{
var cleanedLua = GetCleanLua("int count = 6; $\"count: {count}\"", 1);
var expectedLua = "`count: {count}`";
Assert.Equal(expectedLua, cleanedLua);
}
[Theory]
[InlineData("Vector3")]
[InlineData("NumberRange")]
[InlineData("BrickColor")]
[InlineData("Instance")]
public void RobloxType_DoesNotGenerateGetAssemblyTypeCall(string robloxType)
{
var cleanedLua = GetCleanLua($"using {Utility.RuntimeAssemblyName}; {robloxType}.a;");
Assert.Equal(robloxType + ".a", cleanedLua);
}
[Theory]
[InlineData("Instance")]
[InlineData($"{Utility.RuntimeAssemblyName}.Instance")]
public void InstanceCreate_Macros(string instanceClassPath)
{
var cleanedLua = GetCleanLua($"using {Utility.RuntimeAssemblyName}; var part = {instanceClassPath}.Create<Part>()");
Assert.Equal("local part = Instance.new(\"Part\")", cleanedLua);
}
[Fact]
public void InstanceIsA_Macros()
{
var cleanedLua = GetCleanLua($"using {Utility.RuntimeAssemblyName}; var part = Instance.Create<Part>(); part.IsA<Frame>();", 1);
Assert.Equal("part:IsA(\"Frame\")", cleanedLua);
}
[Theory]
[InlineData("using static Roblox.Globals; print")]
[InlineData("Roblox.Globals.print")]
public void ConsoleMethods_Macro(string fullMethodPath)
{
var cleanedLua = GetCleanLua($"{fullMethodPath}(\"hello world\")");
Assert.Equal("print(\"hello world\")", cleanedLua);
}
[Theory]
[InlineData("game")]
[InlineData("script")]
[InlineData("os")]
[InlineData("task")]
public void StaticClass_NoFullQualification(string memberName)
{
var cleanedLua = GetCleanLua($"{Utility.RuntimeAssemblyName}.Globals.{memberName}");
Assert.Equal(memberName, cleanedLua);
}
[Theory]
[InlineData("object obj; obj?.Name;")]
[InlineData("object a; a.b?.c;")]
public void SafeNavigation_GeneratesIfStatement(string source)
{
var cleanedLua = GetCleanLua(source, 1);
switch (source)
{
case "object obj; obj?.Name;":
Assert.Equal("if obj == nil then nil else obj.Name", cleanedLua);
break;
case "object a; a.b?.c;":
Assert.Equal("if a.b == nil then nil else a.b.c", cleanedLua);
break;
}
}
[Fact]
public void NullCoalescing_GeneratesIfStatement()
{
var cleanedLua = GetCleanLua("int? x; int? y; x ?? y", 2);
Assert.Equal("if x == nil then y else x", cleanedLua);
}
[Fact]
public void TupleExpression_GeneratesTable()
{
var cleanedLua = GetCleanLua("var tuple = (1, 2, 3)");
Assert.Equal("local tuple = {1, 2, 3}", cleanedLua);
}
[Fact]
public void TupleIndexing_GeneratesTableIndexing()
{
var cleanedLua = GetCleanLua("var tuple = (1, 2, 3);\ntuple.Item1;\ntuple.Item2;\ntuple.Item3;\n", 1);
var lines = GetLines(cleanedLua);
Assert.Equal("tuple[1]", lines[0]);
Assert.Equal("tuple[2]", lines[1]);
Assert.Equal("tuple[3]", lines[2]);
}
[Fact]
public void CollectionInitializer_GeneratesTable()
{
var cleanedLua = GetCleanLua("int[] nums = [1, 2, 3]");
Assert.Equal("local nums: { number } = {1, 2, 3}", cleanedLua);
}
[Theory]
[InlineData("int[] nums = [1, 2, 3]; nums[0]", "nums[1]", 1)]
[InlineData("int[] nums = [1, 2, 3]; int i = 4; nums[i]", "nums[i + 1]", 2)]
public void CollectionIndexing_AddsOneToNumericalIndices(string input, string expected, int removeLines)
{
var cleanedLua = GetCleanLua(input, removeLines);
Assert.Equal(expected, cleanedLua);
}
private static void AssertEqualLines(List<string> lines, List<string> expectedLines)
{
foreach (var line in lines)
{
var expectedLine = expectedLines.ElementAt(lines.IndexOf(line));
Assert.Equal(expectedLine, line);
}
}
private List<string> GetLines(string cleanLua)
{
return cleanLua.Split('\n').Select(line => line.Trim()).ToList();
}
private string GetCleanLua(string source, int extraLines = 0)
{
var cleanTree = TranspilerUtility.ParseTree(source);
var transformedTree = TranspilerUtility.TransformTree(cleanTree, [BuiltInTransformers.Main()]);
var compiler = TranspilerUtility.GetCompiler([transformedTree]);
var memberCollector = new MemberCollector([cleanTree]);
var generatedLua = TranspilerUtility.GenerateLua(transformedTree, compiler, memberCollector.Collect());
return TranspilerUtility.CleanUpLuaForTests(generatedLua, extraLines);
}
}
} |