luau/tests/TypeInfer.primitives.test.cpp

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// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Luau/AstQuery.h"
#include "Luau/BuiltinDefinitions.h"
#include "Luau/Scope.h"
#include "Luau/TypeInfer.h"
#include "Luau/TypeVar.h"
#include "Luau/VisitTypeVar.h"
#include "Fixture.h"
#include "doctest.h"
using namespace Luau;
TEST_SUITE_BEGIN("TypeInferPrimitives");
TEST_CASE_FIXTURE(Fixture, "cannot_call_primitives")
{
CheckResult result = check("local foo = 5 foo()");
LUAU_REQUIRE_ERROR_COUNT(1, result);
REQUIRE(get<CannotCallNonFunction>(result.errors[0]) != nullptr);
}
TEST_CASE_FIXTURE(Fixture, "string_length")
{
CheckResult result = check(R"(
local s = "Hello, World!"
local t = #s
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("number", toString(requireType("t")));
}
TEST_CASE_FIXTURE(Fixture, "string_index")
{
CheckResult result = check(R"(
local s = "Hello, World!"
local t = s[4]
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
NotATable* nat = get<NotATable>(result.errors[0]);
REQUIRE(nat);
CHECK_EQ("string", toString(nat->ty));
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CHECK_EQ("<error-type>", toString(requireType("t")));
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}
TEST_CASE_FIXTURE(Fixture, "string_method")
{
CheckResult result = check(R"(
local p = ("tacos"):len()
)");
CHECK_EQ(0, result.errors.size());
CHECK_EQ(*requireType("p"), *typeChecker.numberType);
}
TEST_CASE_FIXTURE(Fixture, "string_function_indirect")
{
CheckResult result = check(R"(
local s:string
local l = s.lower
local p = l(s)
)");
CHECK_EQ(0, result.errors.size());
CHECK_EQ(*requireType("p"), *typeChecker.stringType);
}
TEST_CASE_FIXTURE(Fixture, "string_function_other")
{
CheckResult result = check(R"(
local s:string
local p = s:match("foo")
)");
CHECK_EQ(0, result.errors.size());
CHECK_EQ(toString(requireType("p")), "string?");
}
TEST_CASE_FIXTURE(Fixture, "CheckMethodsOfNumber")
{
CheckResult result = check(R"(
local x: number = 9999
function x:y(z: number)
local s: string = z
end
)");
LUAU_REQUIRE_ERROR_COUNT(2, result);
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CHECK_EQ(toString(result.errors[0]), "Cannot add method to non-table type 'number'");
CHECK_EQ(toString(result.errors[1]), "Type 'number' could not be converted into 'string'");
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}
TEST_SUITE_END();