mirror of
https://github.com/luau-lang/luau.git
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593 lines
18 KiB
C++
593 lines
18 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#include "Luau/Scope.h"
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#include "Luau/ToString.h"
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#include "Fixture.h"
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#include "doctest.h"
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using namespace Luau;
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TEST_SUITE_BEGIN("ToString");
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TEST_CASE_FIXTURE(Fixture, "primitive")
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{
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CheckResult result = check("local a = nil local b = 44 local c = 'lalala' local d = true");
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LUAU_REQUIRE_NO_ERRORS(result);
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// A variable without an annotation and with a nil literal should infer as 'free', not 'nil'
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CHECK_NE("nil", toString(requireType("a")));
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CHECK_EQ("number", toString(requireType("b")));
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CHECK_EQ("string", toString(requireType("c")));
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CHECK_EQ("boolean", toString(requireType("d")));
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}
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TEST_CASE_FIXTURE(Fixture, "bound_types")
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{
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CheckResult result = check("local a = 444 local b = a");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("number", toString(requireType("b")));
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}
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TEST_CASE_FIXTURE(Fixture, "free_types")
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{
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CheckResult result = check("local a");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("a", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "cyclic_table")
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{
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TypeVar cyclicTable{TypeVariant(TableTypeVar())};
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TableTypeVar* tableOne = getMutable<TableTypeVar>(&cyclicTable);
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tableOne->props["self"] = {&cyclicTable};
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CHECK_EQ("t1 where t1 = { self: t1 }", toString(&cyclicTable));
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}
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TEST_CASE_FIXTURE(Fixture, "named_table")
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{
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TypeVar table{TypeVariant(TableTypeVar())};
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TableTypeVar* t = getMutable<TableTypeVar>(&table);
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t->name = "TheTable";
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CHECK_EQ("TheTable", toString(&table));
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}
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TEST_CASE_FIXTURE(Fixture, "exhaustive_toString_of_cyclic_table")
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{
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CheckResult result = check(R"(
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--!strict
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local Vec3 = {}
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Vec3.__index = Vec3
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function Vec3.new()
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return setmetatable({x=0, y=0, z=0}, Vec3)
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end
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export type Vec3 = typeof(Vec3.new())
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local thefun: any = function(self, o) return self end
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local multiply: ((Vec3, Vec3) -> Vec3) & ((Vec3, number) -> Vec3) = thefun
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Vec3.__mul = multiply
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local a = Vec3.new()
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)");
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std::string a = toString(requireType("a"), {true});
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CHECK_EQ(std::string::npos, a.find("CYCLE"));
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CHECK_EQ(std::string::npos, a.find("TRUNCATED"));
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//clang-format off
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CHECK_EQ("t2 where "
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"t1 = { __index: t1, __mul: ((t2, number) -> t2) & ((t2, t2) -> t2), new: () -> t2 } ; "
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"t2 = { @metatable t1, {| x: number, y: number, z: number |} }",
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a);
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//clang-format on
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}
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TEST_CASE_FIXTURE(Fixture, "intersection_parenthesized_only_if_needed")
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{
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auto utv = TypeVar{UnionTypeVar{{typeChecker.numberType, typeChecker.stringType}}};
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auto itv = TypeVar{IntersectionTypeVar{{&utv, typeChecker.booleanType}}};
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CHECK_EQ(toString(&itv), "(number | string) & boolean");
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}
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TEST_CASE_FIXTURE(Fixture, "union_parenthesized_only_if_needed")
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{
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auto itv = TypeVar{IntersectionTypeVar{{typeChecker.numberType, typeChecker.stringType}}};
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auto utv = TypeVar{UnionTypeVar{{&itv, typeChecker.booleanType}}};
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CHECK_EQ(toString(&utv), "(number & string) | boolean");
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}
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TEST_CASE_FIXTURE(Fixture, "functions_are_always_parenthesized_in_unions_or_intersections")
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{
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auto stringAndNumberPack = TypePackVar{TypePack{{typeChecker.stringType, typeChecker.numberType}}};
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auto numberAndStringPack = TypePackVar{TypePack{{typeChecker.numberType, typeChecker.stringType}}};
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auto sn2ns = TypeVar{FunctionTypeVar{&stringAndNumberPack, &numberAndStringPack}};
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auto ns2sn = TypeVar{FunctionTypeVar(typeChecker.globalScope->level, &numberAndStringPack, &stringAndNumberPack)};
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auto utv = TypeVar{UnionTypeVar{{&ns2sn, &sn2ns}}};
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auto itv = TypeVar{IntersectionTypeVar{{&ns2sn, &sn2ns}}};
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CHECK_EQ(toString(&utv), "((number, string) -> (string, number)) | ((string, number) -> (number, string))");
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CHECK_EQ(toString(&itv), "((number, string) -> (string, number)) & ((string, number) -> (number, string))");
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}
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TEST_CASE_FIXTURE(Fixture, "quit_stringifying_table_type_when_length_is_exceeded")
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{
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TableTypeVar ttv{};
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for (char c : std::string("abcdefghijklmno"))
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ttv.props[std::string(1, c)] = {typeChecker.numberType};
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TypeVar tv{ttv};
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ToStringOptions o;
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o.exhaustive = false;
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o.maxTableLength = 40;
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CHECK_EQ(toString(&tv, o), "{ a: number, b: number, c: number, d: number, e: number, ... 10 more ... }");
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_table_type_is_still_capped_when_exhaustive")
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{
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TableTypeVar ttv{};
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for (char c : std::string("abcdefg"))
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ttv.props[std::string(1, c)] = {typeChecker.numberType};
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TypeVar tv{ttv};
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ToStringOptions o;
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o.exhaustive = true;
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o.maxTableLength = 40;
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CHECK_EQ(toString(&tv, o), "{ a: number, b: number, c: number, d: number, e: number, ... 2 more ... }");
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}
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TEST_CASE_FIXTURE(Fixture, "quit_stringifying_type_when_length_is_exceeded")
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{
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CheckResult result = check(R"(
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function f0() end
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function f1(f) return f or f0 end
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function f2(f) return f or f1 end
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function f3(f) return f or f2 end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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ToStringOptions o;
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o.exhaustive = false;
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o.maxTypeLength = 40;
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CHECK_EQ(toString(requireType("f0"), o), "() -> ()");
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CHECK_EQ(toString(requireType("f1"), o), "(() -> ()) -> () -> ()");
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CHECK_EQ(toString(requireType("f2"), o), "((() -> ()) -> () -> ()) -> (() -> ()) -> ... <TRUNCATED>");
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CHECK_EQ(toString(requireType("f3"), o), "(((() -> ()) -> () -> ()) -> (() -> ()) -> ... <TRUNCATED>");
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_type_is_still_capped_when_exhaustive")
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{
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CheckResult result = check(R"(
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function f0() end
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function f1(f) return f or f0 end
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function f2(f) return f or f1 end
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function f3(f) return f or f2 end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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ToStringOptions o;
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o.exhaustive = true;
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o.maxTypeLength = 40;
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CHECK_EQ(toString(requireType("f0"), o), "() -> ()");
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CHECK_EQ(toString(requireType("f1"), o), "(() -> ()) -> () -> ()");
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CHECK_EQ(toString(requireType("f2"), o), "((() -> ()) -> () -> ()) -> (() -> ()) -> ... <TRUNCATED>");
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CHECK_EQ(toString(requireType("f3"), o), "(((() -> ()) -> () -> ()) -> (() -> ()) -> ... <TRUNCATED>");
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_table_type_correctly_use_matching_table_state_braces")
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{
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TableTypeVar ttv{TableState::Sealed, TypeLevel{}};
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for (char c : std::string("abcdefghij"))
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ttv.props[std::string(1, c)] = {typeChecker.numberType};
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TypeVar tv{ttv};
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ToStringOptions o;
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o.maxTableLength = 40;
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CHECK_EQ(toString(&tv, o), "{| a: number, b: number, c: number, d: number, e: number, ... 5 more ... |}");
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_cyclic_union_type_bails_early")
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{
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TypeVar tv{UnionTypeVar{{typeChecker.stringType, typeChecker.numberType}}};
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UnionTypeVar* utv = getMutable<UnionTypeVar>(&tv);
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utv->options.push_back(&tv);
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utv->options.push_back(&tv);
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CHECK_EQ("t1 where t1 = number | string", toString(&tv));
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_cyclic_intersection_type_bails_early")
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{
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TypeVar tv{IntersectionTypeVar{}};
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IntersectionTypeVar* itv = getMutable<IntersectionTypeVar>(&tv);
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itv->parts.push_back(&tv);
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itv->parts.push_back(&tv);
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CHECK_EQ("t1 where t1 = t1 & t1", toString(&tv));
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_array_uses_array_syntax")
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{
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TableTypeVar ttv{TableState::Sealed, TypeLevel{}};
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ttv.indexer = TableIndexer{typeChecker.numberType, typeChecker.stringType};
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CHECK_EQ("{string}", toString(TypeVar{ttv}));
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ttv.props["A"] = {typeChecker.numberType};
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CHECK_EQ("{| [number]: string, A: number |}", toString(TypeVar{ttv}));
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ttv.props.clear();
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ttv.state = TableState::Unsealed;
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CHECK_EQ("{string}", toString(TypeVar{ttv}));
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}
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TEST_CASE_FIXTURE(Fixture, "generic_packs_are_stringified_differently_from_generic_types")
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{
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TypePackVar tpv{GenericTypePack{"a"}};
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CHECK_EQ(toString(&tpv), "a...");
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TypeVar tv{GenericTypeVar{"a"}};
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CHECK_EQ(toString(&tv), "a");
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}
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TEST_CASE_FIXTURE(Fixture, "function_type_with_argument_names")
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{
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CheckResult result = check("type MyFunc = (a: number, string, c: number) -> string; local a : MyFunc");
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LUAU_REQUIRE_NO_ERRORS(result);
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ToStringOptions opts;
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opts.functionTypeArguments = true;
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CHECK_EQ("(a: number, string, c: number) -> string", toString(requireType("a"), opts));
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}
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TEST_CASE_FIXTURE(Fixture, "function_type_with_argument_names_generic")
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{
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CheckResult result = check("local function f<a...>(n: number, ...: a...): (a...) return ... end");
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LUAU_REQUIRE_NO_ERRORS(result);
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ToStringOptions opts;
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opts.functionTypeArguments = true;
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CHECK_EQ("<a...>(n: number, a...) -> (a...)", toString(requireType("f"), opts));
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}
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TEST_CASE_FIXTURE(Fixture, "function_type_with_argument_names_and_self")
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{
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CheckResult result = check(R"(
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local tbl = {}
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tbl.a = 2
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function tbl:foo(b: number, c: number) return (self.a :: number) + b + c end
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type Table = typeof(tbl)
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type Foo = typeof(tbl.foo)
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local u: Foo
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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ToStringOptions opts;
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opts.functionTypeArguments = true;
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// Can't guess the name of 'self' to compare name, but at least there should be no assertion
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toString(requireType("u"), opts);
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}
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TEST_CASE_FIXTURE(Fixture, "generate_friendly_names_for_inferred_generics")
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{
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CheckResult result = check(R"(
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function id(x) return x end
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function id2(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30)
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return a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("<a>(a) -> a", toString(requireType("id")));
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CHECK_EQ("<a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, a1, b1, c1, d1>(a, b, c, d, e, f, g, h, i, j, k, l, "
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"m, n, o, p, q, r, s, t, u, v, w, x, y, z, a1, b1, c1, d1) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, "
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"x, y, z, a1, b1, c1, d1)",
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toString(requireType("id2")));
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}
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TEST_CASE_FIXTURE(Fixture, "toStringDetailed")
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{
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CheckResult result = check(R"(
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function id3(a, b, c)
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return a, b, c
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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TypeId id3Type = requireType("id3");
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ToStringResult nameData = toStringDetailed(id3Type);
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REQUIRE_EQ(3, nameData.nameMap.typeVars.size());
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REQUIRE_EQ("<a, b, c>(a, b, c) -> (a, b, c)", nameData.name);
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ToStringOptions opts;
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opts.nameMap = std::move(nameData.nameMap);
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const FunctionTypeVar* ftv = get<FunctionTypeVar>(follow(id3Type));
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REQUIRE(ftv != nullptr);
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auto params = flatten(ftv->argTypes).first;
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REQUIRE_EQ(3, params.size());
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REQUIRE_EQ("a", toString(params[0], opts));
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REQUIRE_EQ("b", toString(params[1], opts));
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REQUIRE_EQ("c", toString(params[2], opts));
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}
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TEST_CASE_FIXTURE(Fixture, "toStringDetailed2")
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{
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ScopedFastFlag sff{"LuauUnsealedTableLiteral", true};
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CheckResult result = check(R"(
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local base = {}
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function base:one() return 1 end
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local child = {}
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setmetatable(child, {__index=base})
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function child:two() return 2 end
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local inst = {}
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setmetatable(inst, {__index=child})
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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TypeId tType = requireType("inst");
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ToStringResult r = toStringDetailed(tType);
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CHECK_EQ("{ @metatable { __index: { @metatable { __index: base }, child } }, inst }", r.name);
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CHECK_EQ(0, r.nameMap.typeVars.size());
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ToStringOptions opts;
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opts.nameMap = r.nameMap;
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const MetatableTypeVar* tMeta = get<MetatableTypeVar>(tType);
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REQUIRE(tMeta);
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TableTypeVar* tMeta2 = getMutable<TableTypeVar>(tMeta->metatable);
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REQUIRE(tMeta2);
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REQUIRE(tMeta2->props.count("__index"));
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const MetatableTypeVar* tMeta3 = get<MetatableTypeVar>(tMeta2->props["__index"].type);
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REQUIRE(tMeta3);
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TableTypeVar* tMeta4 = getMutable<TableTypeVar>(tMeta3->metatable);
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REQUIRE(tMeta4);
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REQUIRE(tMeta4->props.count("__index"));
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TableTypeVar* tMeta5 = getMutable<TableTypeVar>(tMeta4->props["__index"].type);
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REQUIRE(tMeta5);
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TableTypeVar* tMeta6 = getMutable<TableTypeVar>(tMeta3->table);
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REQUIRE(tMeta6);
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ToStringResult oneResult = toStringDetailed(tMeta5->props["one"].type, opts);
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opts.nameMap = oneResult.nameMap;
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std::string twoResult = toString(tMeta6->props["two"].type, opts);
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REQUIRE_EQ("<a>(a) -> number", oneResult.name);
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REQUIRE_EQ("<b>(b) -> number", twoResult);
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}
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TEST_CASE_FIXTURE(Fixture, "toStringErrorPack")
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{
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CheckResult result = check(R"(
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local function target(callback: nil) return callback(4, "hello") end
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)");
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LUAU_REQUIRE_ERRORS(result);
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CHECK_EQ("(nil) -> (*unknown*)", toString(requireType("target")));
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}
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TEST_CASE_FIXTURE(Fixture, "toStringGenericPack")
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{
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CheckResult result = check(R"(
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function foo(a, b) return a(b) end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ(toString(requireType("foo")), "<a, b...>((a) -> (b...), a) -> (b...)");
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}
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TEST_CASE_FIXTURE(Fixture, "toString_the_boundTo_table_type_contained_within_a_TypePack")
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{
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TypeVar tv1{TableTypeVar{}};
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TableTypeVar* ttv = getMutable<TableTypeVar>(&tv1);
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ttv->state = TableState::Sealed;
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ttv->props["hello"] = {typeChecker.numberType};
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ttv->props["world"] = {typeChecker.numberType};
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TypePackVar tpv1{TypePack{{&tv1}}};
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TypeVar tv2{TableTypeVar{}};
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TableTypeVar* bttv = getMutable<TableTypeVar>(&tv2);
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bttv->state = TableState::Free;
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bttv->props["hello"] = {typeChecker.numberType};
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bttv->boundTo = &tv1;
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TypePackVar tpv2{TypePack{{&tv2}}};
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CHECK_EQ("{| hello: number, world: number |}", toString(&tpv1));
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CHECK_EQ("{| hello: number, world: number |}", toString(&tpv2));
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}
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TEST_CASE_FIXTURE(Fixture, "no_parentheses_around_cyclic_function_type_in_union")
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{
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CheckResult result = check(R"(
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type F = ((() -> number)?) -> F?
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local function f(p) return f end
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local g: F = f
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("t1 where t1 = ((() -> number)?) -> t1?", toString(requireType("g")));
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}
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TEST_CASE_FIXTURE(Fixture, "no_parentheses_around_cyclic_function_type_in_intersection")
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{
|
|
CheckResult result = check(R"(
|
|
function f() return f end
|
|
local a: ((number) -> ()) & typeof(f)
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
CHECK_EQ("((number) -> ()) & t1 where t1 = () -> t1", toString(requireType("a")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "self_recursive_instantiated_param")
|
|
{
|
|
TypeVar tableTy{TableTypeVar{}};
|
|
TableTypeVar* ttv = getMutable<TableTypeVar>(&tableTy);
|
|
ttv->name = "Table";
|
|
ttv->instantiatedTypeParams.push_back(&tableTy);
|
|
|
|
CHECK_EQ(toString(tableTy), "Table<Table>");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_id")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function id(x) return x end
|
|
)");
|
|
|
|
TypeId ty = requireType("id");
|
|
const FunctionTypeVar* ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
CHECK_EQ("id<a>(x: a): a", toStringNamedFunction("id", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_map")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function map(arr, fn)
|
|
local t = {}
|
|
for i = 0, #arr do
|
|
t[i] = fn(arr[i])
|
|
end
|
|
return t
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("map");
|
|
const FunctionTypeVar* ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
CHECK_EQ("map<a, b>(arr: {a}, fn: (a) -> b): {b}", toStringNamedFunction("map", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_generic_pack")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f(a: number, b: string) end
|
|
local function test<T..., U...>(...: T...): U...
|
|
f(...)
|
|
return 1, 2, 3
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("test");
|
|
const FunctionTypeVar* ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
CHECK_EQ("test<T..., U...>(...: T...): U...", toStringNamedFunction("test", *ftv));
|
|
}
|
|
|
|
TEST_CASE("toStringNamedFunction_unit_f")
|
|
{
|
|
TypePackVar empty{TypePack{}};
|
|
FunctionTypeVar ftv{&empty, &empty, {}, false};
|
|
CHECK_EQ("f(): ()", toStringNamedFunction("f", ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_variadics")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f<a, b...>(x: a, ...): (a, a, b...)
|
|
return x, x, ...
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
CHECK_EQ("f<a, b...>(x: a, ...: any): (a, a, b...)", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_variadics2")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f(): ...number
|
|
return 1, 2, 3
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
CHECK_EQ("f(): ...number", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_variadics3")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f(): (string, ...number)
|
|
return 'a', 1, 2, 3
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
CHECK_EQ("f(): (string, ...number)", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_type_annotation_has_partial_argnames")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local f: (number, y: number) -> number
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
CHECK_EQ("f(_: number, y: number): number", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_hide_type_params")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f<T>(x: T, g: <U>(T) -> U)): ()
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionTypeVar>(follow(ty));
|
|
|
|
ToStringOptions opts;
|
|
opts.hideNamedFunctionTypeParameters = true;
|
|
CHECK_EQ("f(x: T, g: <U>(T) -> U): ()", toStringNamedFunction("f", *ftv, opts));
|
|
}
|
|
|
|
TEST_SUITE_END();
|