test/test_hash_key.cpp@056e5f592d84
test/test_hash_key.cpp
Sun, 06 Nov 2022 16:07:32 +0100
- author
- Mike Becker <universe@uap-core.de>
- date
- Sun, 06 Nov 2022 16:07:32 +0100
- changeset 604
- 056e5f592d84
- parent 603
- c49104015a6b
- permissions
- -rw-r--r--
change hash functions
1) for zero-terminated strings, the terminator is no longer included in the hash
2) for NULL there is now a special hash value different from the hash for empty data
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
29 #include "cx/hash_key.h"
31 #include <gtest/gtest.h>
33 TEST(cx_hash_key, functions) {
34 auto str = "my key";
35 auto len = strlen(str);
37 auto str_key = cx_hash_key_str(str);
38 auto bytes_key = cx_hash_key_bytes(
39 reinterpret_cast<unsigned char const *>(str), len);
40 auto obj_key = cx_hash_key(
41 reinterpret_cast<void const *>(str), len);
43 EXPECT_EQ(str_key.hash, bytes_key.hash);
44 EXPECT_EQ(obj_key.hash, bytes_key.hash);
45 EXPECT_EQ(str_key.len, len);
46 EXPECT_EQ(bytes_key.len, len);
47 EXPECT_EQ(bytes_key.len, len);
48 EXPECT_EQ(str_key.data.cstr, str);
49 EXPECT_EQ(bytes_key.data.cbytes, reinterpret_cast<unsigned char const *>(str));
50 EXPECT_EQ(bytes_key.data.cobj, reinterpret_cast<void const *>(str));
51 }
53 TEST(cx_hash_key, empty_string) {
54 auto str = "";
56 auto str_key = cx_hash_key_str(str);
57 auto bytes_key = cx_hash_key_bytes(
58 reinterpret_cast<unsigned char const *>(str), 0);
59 auto obj_key = cx_hash_key(
60 reinterpret_cast<void const *>(str), 0);
62 EXPECT_EQ(bytes_key.hash, 4152238450u);
63 EXPECT_EQ(str_key.hash, 4152238450u);
64 EXPECT_EQ(obj_key.hash, 4152238450u);
65 EXPECT_EQ(str_key.len, 0);
66 EXPECT_EQ(bytes_key.len, 0);
67 EXPECT_EQ(bytes_key.len, 0);
68 EXPECT_EQ(str_key.data.cstr, str);
69 EXPECT_EQ(bytes_key.data.cbytes, reinterpret_cast<unsigned char const *>(str));
70 EXPECT_EQ(bytes_key.data.cobj, reinterpret_cast<void const *>(str));
71 }
73 TEST(cx_hash_key, null_ptr) {
74 auto str_key = cx_hash_key_str(nullptr);
75 auto bytes_key = cx_hash_key_bytes(nullptr, 0);
76 auto obj_key = cx_hash_key(nullptr, 0);
78 EXPECT_EQ(bytes_key.hash, 1574210520u);
79 EXPECT_EQ(str_key.hash, 1574210520u);
80 EXPECT_EQ(obj_key.hash, 1574210520u);
81 EXPECT_EQ(str_key.len, 0);
82 EXPECT_EQ(bytes_key.len, 0);
83 EXPECT_EQ(bytes_key.len, 0);
84 EXPECT_EQ(str_key.data.cstr, nullptr);
85 EXPECT_EQ(bytes_key.data.cbytes, nullptr);
86 EXPECT_EQ(bytes_key.data.cobj, nullptr);
87 }
