luau/tests/AstQuery.test.cpp

// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Fixture.h"

#include "Luau/AstQuery.h"

#include "doctest.h"

using namespace Luau;

struct DocumentationSymbolFixture : BuiltinsFixture
{
    std::optional<DocumentationSymbol> getDocSymbol(const std::string& source, Position position)
    {
        check(source);

        SourceModule* sourceModule = getMainSourceModule();
        ModulePtr module = getMainModule();

        return getDocumentationSymbolAtPosition(*sourceModule, *module, position);
    }
};

TEST_SUITE_BEGIN("AstQuery::getDocumentationSymbolAtPosition");

TEST_CASE_FIXTURE(DocumentationSymbolFixture, "binding")
{
    std::optional<DocumentationSymbol> global = getDocSymbol(R"(
        local a = string.sub()
    )",
        Position(1, 21));

    CHECK_EQ(global, "@luau/global/string");
}

TEST_CASE_FIXTURE(DocumentationSymbolFixture, "prop")
{
    std::optional<DocumentationSymbol> substring = getDocSymbol(R"(
        local a = string.sub()
    )",
        Position(1, 27));

    CHECK_EQ(substring, "@luau/global/string.sub");
}

TEST_CASE_FIXTURE(DocumentationSymbolFixture, "event_callback_arg")
{
    loadDefinition(R"(
        declare function Connect(fn: (string) -> ())
    )");

    std::optional<DocumentationSymbol> substring = getDocSymbol(R"(
        Connect(function(abc)
        end)
    )",
        Position(1, 27));

    CHECK_EQ(substring, "@test/global/Connect/param/0/param/0");
}

TEST_CASE_FIXTURE(DocumentationSymbolFixture, "overloaded_fn")
{
    loadDefinition(R"(
        declare foo: ((string) -> number) & ((number) -> string)
    )");

    std::optional<DocumentationSymbol> symbol = getDocSymbol(R"(
        foo("asdf")
    )",
        Position(1, 10));

    CHECK_EQ(symbol, "@test/global/foo/overload/(string) -> number");
}

TEST_SUITE_END();

TEST_SUITE_BEGIN("AstQuery");

TEST_CASE_FIXTURE(Fixture, "last_argument_function_call_type")
{
    check(R"(
local function foo() return 2 end
local function bar(a: number) return -a end
bar(foo())
    )");

    auto oty = findTypeAtPosition(Position(3, 7));
    REQUIRE(oty);
    CHECK_EQ("number", toString(*oty));

    auto expectedOty = findExpectedTypeAtPosition(Position(3, 7));
    REQUIRE(expectedOty);
    CHECK_EQ("number", toString(*expectedOty));
}

TEST_CASE_FIXTURE(Fixture, "ast_ancestry_at_eof")
{
    check(R"(
if true then
    )");

    std::vector<AstNode*> ancestry = findAstAncestryOfPosition(*getMainSourceModule(), Position(2, 4));
    REQUIRE_GE(ancestry.size(), 2);
    AstStat* parentStat = ancestry[ancestry.size() - 2]->asStat();
    REQUIRE(bool(parentStat));
    REQUIRE(parentStat->is<AstStatIf>());
}

TEST_SUITE_END();