mirror of
https://github.com/luau-lang/luau.git
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346 lines
7.2 KiB
C++
346 lines
7.2 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/AstQuery.h"
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#include "Luau/BuiltinDefinitions.h"
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#include "Luau/Scope.h"
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#include "Luau/TypeInfer.h"
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#include "Luau/TypeVar.h"
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#include "Luau/VisitTypeVar.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("TypeInferAnyError");
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TEST_CASE_FIXTURE(Fixture, "for_in_loop_iterator_returns_any")
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{
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CheckResult result = check(R"(
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function bar(): any
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return true
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end
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local a
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for b in bar do
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a = b
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ(typeChecker.anyType, requireType("a"));
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}
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TEST_CASE_FIXTURE(Fixture, "for_in_loop_iterator_returns_any2")
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{
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CheckResult result = check(R"(
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function bar(): any
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return true
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end
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local a
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for b in bar() do
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a = b
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("any", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "for_in_loop_iterator_is_any")
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{
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CheckResult result = check(R"(
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local bar: any
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local a
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for b in bar do
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a = b
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("any", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "for_in_loop_iterator_is_any2")
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{
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CheckResult result = check(R"(
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local bar: any
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local a
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for b in bar() do
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a = b
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("any", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "for_in_loop_iterator_is_error")
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{
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CheckResult result = check(R"(
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local a
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for b in bar do
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a = b
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end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ("*error-type*", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "for_in_loop_iterator_is_error2")
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{
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CheckResult result = check(R"(
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function bar(c) return c end
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local a
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for b in bar() do
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a = b
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end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ("*error-type*", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "length_of_error_type_does_not_produce_an_error")
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{
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CheckResult result = check(R"(
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local l = #this_is_not_defined
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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}
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TEST_CASE_FIXTURE(Fixture, "indexing_error_type_does_not_produce_an_error")
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{
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CheckResult result = check(R"(
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local originalReward = unknown.Parent.Reward:GetChildren()[1]
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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}
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TEST_CASE_FIXTURE(Fixture, "dot_on_error_type_does_not_produce_an_error")
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{
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CheckResult result = check(R"(
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local foo = (true).x
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foo.x = foo.y
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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}
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TEST_CASE_FIXTURE(Fixture, "any_type_propagates")
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{
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CheckResult result = check(R"(
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local foo: any
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local bar = foo:method("argument")
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("any", toString(requireType("bar")));
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}
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TEST_CASE_FIXTURE(Fixture, "can_subscript_any")
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{
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CheckResult result = check(R"(
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local foo: any
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local bar = foo[5]
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("any", toString(requireType("bar")));
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}
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// Not strictly correct: metatables permit overriding this
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TEST_CASE_FIXTURE(Fixture, "can_get_length_of_any")
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{
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CheckResult result = check(R"(
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local foo: any = {}
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local bar = #foo
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ(PrimitiveTypeVar::Number, getPrimitiveType(requireType("bar")));
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}
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TEST_CASE_FIXTURE(Fixture, "assign_prop_to_table_by_calling_any_yields_any")
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{
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CheckResult result = check(R"(
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local f: any
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local T = {}
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T.prop = f()
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return T
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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TableTypeVar* ttv = getMutable<TableTypeVar>(requireType("T"));
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REQUIRE(ttv);
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REQUIRE(ttv->props.count("prop"));
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REQUIRE_EQ("any", toString(ttv->props["prop"].type));
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}
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TEST_CASE_FIXTURE(Fixture, "quantify_any_does_not_bind_to_itself")
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{
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CheckResult result = check(R"(
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local A : any
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function A.B() end
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A:C()
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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TypeId aType = requireType("A");
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CHECK_EQ(aType, typeChecker.anyType);
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}
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TEST_CASE_FIXTURE(Fixture, "calling_error_type_yields_error")
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{
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CheckResult result = check(R"(
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local a = unknown.Parent.Reward.GetChildren()
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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UnknownSymbol* err = get<UnknownSymbol>(result.errors[0]);
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REQUIRE(err != nullptr);
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CHECK_EQ("unknown", err->name);
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CHECK_EQ("*error-type*", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "chain_calling_error_type_yields_error")
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{
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CheckResult result = check(R"(
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local a = Utility.Create "Foo" {}
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)");
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CHECK_EQ("*error-type*", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "replace_every_free_type_when_unifying_a_complex_function_with_any")
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{
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CheckResult result = check(R"(
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local a: any
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local b
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for _, i in pairs(a) do
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b = i
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("any", toString(requireType("b")));
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}
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TEST_CASE_FIXTURE(Fixture, "call_to_any_yields_any")
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{
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CheckResult result = check(R"(
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local a: any
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local b = a()
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)");
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REQUIRE_EQ("any", toString(requireType("b")));
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}
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TEST_CASE_FIXTURE(Fixture, "CheckMethodsOfAny")
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{
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CheckResult result = check(R"(
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local x: any = {}
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function x:y(z: number)
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local s: string = z
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end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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}
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TEST_CASE_FIXTURE(Fixture, "CheckMethodsOfError")
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{
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CheckResult result = check(R"(
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local x = (true).foo
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function x:y(z: number)
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local s: string = z
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end
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)");
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LUAU_REQUIRE_ERRORS(result);
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "metatable_of_any_can_be_a_table")
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{
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CheckResult result = check(R"(
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--!strict
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local T: any
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T = {}
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T.__index = T
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function T.new(...)
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local self = {}
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setmetatable(self, T)
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self:construct(...)
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return self
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end
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function T:construct(index)
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "type_error_addition")
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{
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CheckResult result = check(R"(
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--!strict
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local foo = makesandwich()
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local bar = foo.nutrition + 100
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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// We should definitely get this error
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CHECK_EQ("Unknown global 'makesandwich'", toString(result.errors[0]));
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// We get this error if makesandwich() returns a free type
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// CHECK_EQ("Unknown type used in + operation; consider adding a type annotation to 'foo'", toString(result.errors[1]));
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}
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TEST_CASE_FIXTURE(Fixture, "prop_access_on_any_with_other_options")
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{
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CheckResult result = check(R"(
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local function f(thing: any | string)
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local foo = thing.SomeRandomKey
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "union_of_types_regression_test")
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{
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CheckResult result = check(R"(
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--!strict
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local stat
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stat = stat and tonumber(stat) or stat
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_SUITE_END();
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