test/test_hash_key.cpp

/*
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 *
 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 *   2. Redistributions in binary form must reproduce the above copyright
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#include "cx/hash_key.h"

#include <gtest/gtest.h>

TEST(cx_hash_key, functions) {
    auto str = "my key";
    auto len = strlen(str);

    auto str_key = cx_hash_key_str(str);
    auto bytes_key = cx_hash_key_bytes(
            reinterpret_cast<unsigned char const *>(str), len);
    auto obj_key = cx_hash_key(
            reinterpret_cast<void const *>(str), len);

    EXPECT_EQ(str_key.hash, bytes_key.hash);
    EXPECT_EQ(obj_key.hash, bytes_key.hash);
    EXPECT_EQ(str_key.len, len);
    EXPECT_EQ(bytes_key.len, len);
    EXPECT_EQ(bytes_key.len, len);
    EXPECT_EQ(str_key.data.cstr, str);
    EXPECT_EQ(bytes_key.data.cbytes, reinterpret_cast<unsigned char const *>(str));
    EXPECT_EQ(bytes_key.data.cobj, reinterpret_cast<void const *>(str));
}

TEST(cx_hash_key, empty_string) {
    auto str = "";

    auto str_key = cx_hash_key_str(str);
    auto bytes_key = cx_hash_key_bytes(
            reinterpret_cast<unsigned char const *>(str), 0);
    auto obj_key = cx_hash_key(
            reinterpret_cast<void const *>(str), 0);

    EXPECT_EQ(bytes_key.hash, 4152238450u);
    EXPECT_EQ(str_key.hash, 4152238450u);
    EXPECT_EQ(obj_key.hash, 4152238450u);
    EXPECT_EQ(str_key.len, 0);
    EXPECT_EQ(bytes_key.len, 0);
    EXPECT_EQ(bytes_key.len, 0);
    EXPECT_EQ(str_key.data.cstr, str);
    EXPECT_EQ(bytes_key.data.cbytes, reinterpret_cast<unsigned char const *>(str));
    EXPECT_EQ(bytes_key.data.cobj, reinterpret_cast<void const *>(str));
}

TEST(cx_hash_key, null_ptr) {
    auto str_key = cx_hash_key_str(nullptr);
    auto bytes_key = cx_hash_key_bytes(nullptr, 0);
    auto obj_key = cx_hash_key(nullptr, 0);

    EXPECT_EQ(bytes_key.hash, 1574210520u);
    EXPECT_EQ(str_key.hash, 1574210520u);
    EXPECT_EQ(obj_key.hash, 1574210520u);
    EXPECT_EQ(str_key.len, 0);
    EXPECT_EQ(bytes_key.len, 0);
    EXPECT_EQ(bytes_key.len, 0);
    EXPECT_EQ(str_key.data.cstr, nullptr);
    EXPECT_EQ(bytes_key.data.cbytes, nullptr);
    EXPECT_EQ(bytes_key.data.cobj, nullptr);
}