trie.test.cc

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/*
 * Copyright (c) 2012 Google
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#include <gtest/gtest.h>
 
#include <iostream>
#include <sstream>
#include <string>
 
#include "base/trie.hh"
#include "base/types.hh"
 
using namespace gem5;
 
namespace {
 
static inline uint32_t *ptr(uintptr_t val)
{
    return (uint32_t *)val;
}
 
} // anonymous namespace
 
class TrieTestData : public testing::Test
{
  protected:
    typedef Trie<Addr, uint32_t> TrieType;
    TrieType trie;
 
    std::string
    dumpTrie()
    {
        std::stringstream ss;
        trie.dump("test trie", ss);
        return ss.str();
    }
};
 
TEST_F(TrieTestData, Empty)
{
    EXPECT_EQ(trie.lookup(0x123456701234567), nullptr) << dumpTrie();
}
 
TEST_F(TrieTestData, SingleEntry)
{
    trie.insert(0x0123456789abcdef, 40, ptr(1));
    EXPECT_EQ(trie.lookup(0x123456701234567), nullptr) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(1)) << dumpTrie();
}
 
TEST_F(TrieTestData, TwoOverlappingEntries)
{
    trie.insert(0x0123456789abcdef, 40, ptr(1));
    trie.insert(0x0123456789abcdef, 36, ptr(2));
    EXPECT_EQ(trie.lookup(0x123456700000000), nullptr) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(2)) << dumpTrie();
}
 
TEST_F(TrieTestData, TwoOverlappingEntriesReversed)
{
    trie.insert(0x0123456789abcdef, 36, ptr(2));
    trie.insert(0x0123456789abcdef, 40, ptr(1));
    EXPECT_EQ(trie.lookup(0x123456700000000), nullptr) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(2)) << dumpTrie();
}
 
TEST_F(TrieTestData, TwoIndependentEntries)
{
    trie.insert(0x0123456789abcdef, 40, ptr(2));
    trie.insert(0x0123456776543210, 40, ptr(1));
    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(2)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456776000000), ptr(1)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456700000000), nullptr) << dumpTrie();
}
 
TEST_F(TrieTestData, TwoEntries)
{
    trie.insert(0x0123456789000000, 40, ptr(4));
    trie.insert(0x0123000000000000, 40, ptr(1));
    trie.insert(0x0123456780000000, 40, ptr(3));
    trie.insert(0x0123456700000000, 40, ptr(2));
 
    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(2)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
}
 
TEST_F(TrieTestData, RemovingEntries)
{
    TrieType::Handle node1, node2;
    trie.insert(0x0123456789000000, 40, ptr(4));
    trie.insert(0x0123000000000000, 40, ptr(1));
    trie.insert(0x0123456780000000, 40, ptr(3));
    node1 = trie.insert(0x0123456700000000, 40, ptr(2));
    node2 = trie.insert(0x0123456700000000, 32, ptr(10));
 
    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(10)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(10)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(10)) << dumpTrie();
 
    trie.remove(node2);
 
    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(2)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
 
    trie.remove(node1);
 
    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456700000000), nullptr) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
}