psil/test/vm/GCTest.cpp

//
// Created by Stepan Usatiuk on 26.12.2023.
//

#include <gtest/gtest.h>

#include "MemoryContext.h"

TEST(GCTest, GCTest) {
    MemoryContext mc;
    {
        Handle c = Handle::cons(nullptr, nullptr);
        mc.request_gc_and_wait();
        Handle::append(c, Handle::makeNumCell(1));
        Handle::append(c, Handle::makeNumCell(2));
        mc.request_gc_and_wait();
        EXPECT_EQ(c.car().val(), 1);
        EXPECT_EQ(c.cdr().car().val(), 2);
    }
    mc.request_gc_and_wait();
    mc.request_gc_and_wait();
    EXPECT_EQ(mc.cell_count(), 0);
    {
        Handle c = Handle::cons(nullptr, nullptr);
        mc.request_gc_and_wait();
        Handle::push(c, Handle::makeNumCell(1));
        Handle::push(c, Handle::makeNumCell(2));
        mc.request_gc_and_wait();
        EXPECT_EQ(c.car().val(), 2);
        EXPECT_EQ(c.cdr().car().val(), 1);
    }
    mc.request_gc_and_wait();
    mc.request_gc_and_wait();
    EXPECT_EQ(mc.cell_count(), 0);
}

TEST(GCTest, GCTestAppend) {
    MemoryContext mc;
    for (int i = 0; i < 25000; i++) {
        Handle c = Handle::cons(nullptr, nullptr);
        mc.request_gc();
        Handle::append(c, Handle::makeNumCell(1));
        mc.request_gc();
        EXPECT_EQ(c.car().val(), 1);
    }
    mc.request_gc_and_wait();
    mc.request_gc_and_wait();
    EXPECT_EQ(mc.cell_count(), 0);
}
TEST(GCTest, GCTestPop) {
    MemoryContext mc;
    {
        Handle c = Handle::cons(nullptr, nullptr);
        static constexpr int test_size = 20000;
        for (int i = 0; i < test_size; i++) {
            mc.request_gc();
            Handle::push(c, Handle::makeNumCell(i));
        }
        for (int i = test_size - 1; i >= 0; i--) {
            mc.request_gc();
            EXPECT_EQ(i, Handle::pop(c).val());
        }
    }
    mc.request_gc_and_wait();
    mc.request_gc_and_wait();
    EXPECT_EQ(mc.cell_count(), 0);
}

TEST(GCTest, GCTestAppend2) {
    MemoryContext mc;
    Handle c = Handle::cons(nullptr, nullptr);
    static constexpr int test_size = 2000;
    for (int i = 0; i < test_size; i++) {
        mc.request_gc();
        Handle::append(c, Handle::makeNumCell(i));
    }
    for (int i = 0; i < test_size; i++) {
        mc.request_gc();
        EXPECT_EQ(i, Handle::pop(c).val());
    }
    mc.request_gc_and_wait();
    mc.request_gc_and_wait();
    EXPECT_EQ(mc.cell_count(), 0);
}

TEST(GCTest, GCTestAppend3) {
    MemoryContext mc;
    for (int i = 0; i < 250000; i++) {
        Handle c = Handle::cons(nullptr, nullptr);
        Handle::append(c, Handle::makeNumCell(1));
        Handle::append(c, Handle::makeNumCell(2));
        mc.request_gc();
        Handle n = c.cdr();
        c.setcdr(nullptr);
        EXPECT_EQ(n.car().val(), 2);
        EXPECT_EQ(c.car().val(), 1);
    }
    mc.request_gc_and_wait();
    mc.request_gc_and_wait();
    EXPECT_EQ(mc.cell_count(), 0);
}