125 lines
3.0 KiB
C++
125 lines
3.0 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 "doctest.h"
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#include "Luau/Scope.h"
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#include "Luau/ToString.h"
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#include "Luau/TxnLog.h"
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#include "Luau/Type.h"
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#include "Luau/TypeArena.h"
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#include "ScopedFlags.h"
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using namespace Luau;
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struct TxnLogFixture
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{
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TxnLog log{/*useScopes*/ true};
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TxnLog log2{/*useScopes*/ true};
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TypeArena arena;
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BuiltinTypes builtinTypes;
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ScopePtr globalScope = std::make_shared<Scope>(builtinTypes.anyTypePack);
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ScopePtr childScope = std::make_shared<Scope>(globalScope);
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TypeId a = arena.freshType(globalScope.get());
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TypeId b = arena.freshType(globalScope.get());
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TypeId c = arena.freshType(childScope.get());
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TypeId g = arena.addType(GenericType{"G"});
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};
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TEST_SUITE_BEGIN("TxnLog");
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TEST_CASE_FIXTURE(TxnLogFixture, "colliding_union_incoming_type_has_greater_scope")
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{
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ScopedFastFlag sff{"DebugLuauDeferredConstraintResolution", true};
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log.replace(c, BoundType{a});
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log2.replace(a, BoundType{c});
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CHECK(nullptr != log.pending(c));
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log.concatAsUnion(std::move(log2), NotNull{&arena});
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// 'a has greater scope than 'c, so we expect the incoming binding of 'a to
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// be discarded.
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CHECK(nullptr == log.pending(a));
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const PendingType* pt = log.pending(c);
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REQUIRE(pt != nullptr);
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CHECK(!pt->dead);
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const BoundType* bt = get_if<BoundType>(&pt->pending.ty);
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CHECK(a == bt->boundTo);
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log.commit();
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REQUIRE(get<FreeType>(a));
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const BoundType* bound = get<BoundType>(c);
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REQUIRE(bound);
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CHECK(a == bound->boundTo);
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}
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TEST_CASE_FIXTURE(TxnLogFixture, "colliding_union_incoming_type_has_lesser_scope")
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{
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ScopedFastFlag sff{"DebugLuauDeferredConstraintResolution", true};
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log.replace(a, BoundType{c});
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log2.replace(c, BoundType{a});
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CHECK(nullptr != log.pending(a));
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log.concatAsUnion(std::move(log2), NotNull{&arena});
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// 'a has greater scope than 'c, so we expect the binding of 'a to be
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// discarded, and for that of 'c to be brought in.
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CHECK(nullptr == log.pending(a));
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const PendingType* pt = log.pending(c);
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REQUIRE(pt != nullptr);
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CHECK(!pt->dead);
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const BoundType* bt = get_if<BoundType>(&pt->pending.ty);
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CHECK(a == bt->boundTo);
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log.commit();
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REQUIRE(get<FreeType>(a));
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const BoundType* bound = get<BoundType>(c);
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REQUIRE(bound);
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CHECK(a == bound->boundTo);
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}
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TEST_CASE_FIXTURE(TxnLogFixture, "colliding_coincident_logs_do_not_create_degenerate_unions")
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{
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ScopedFastFlag sff{"DebugLuauDeferredConstraintResolution", true};
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log.replace(a, BoundType{b});
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log2.replace(a, BoundType{b});
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log.concatAsUnion(std::move(log2), NotNull{&arena});
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log.commit();
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CHECK("a" == toString(a));
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CHECK("a" == toString(b));
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}
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TEST_CASE_FIXTURE(TxnLogFixture, "replacing_persistent_types_is_allowed_but_makes_the_log_radioactive")
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{
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persist(g);
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log.replace(g, BoundType{a});
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CHECK(log.radioactive);
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}
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TEST_SUITE_END();
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