1 //===---------- llvm/unittest/Support/DJBTest.cpp -------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/Support/DJB.h"
10 #include "llvm/ADT/Twine.h"
11 #include "gtest/gtest.h"
12
13 using namespace llvm;
14
TEST(DJBTest,caseFolding)15 TEST(DJBTest, caseFolding) {
16 struct TestCase {
17 StringLiteral One;
18 StringLiteral Two;
19 };
20
21 static constexpr TestCase Tests[] = {
22 {{"ASDF"}, {"asdf"}},
23 {{"qWeR"}, {"QwEr"}},
24 {{"qqqqqqqqqqqqqqqqqqqq"}, {"QQQQQQQQQQQQQQQQQQQQ"}},
25
26 {{"I"}, {"i"}},
27 // Latin Small Letter Dotless I
28 {{u8"\u0130"}, {"i"}},
29 // Latin Capital Letter I With Dot Above
30 {{u8"\u0131"}, {"i"}},
31
32 // Latin Capital Letter A With Grave
33 {{u8"\u00c0"}, {u8"\u00e0"}},
34 // Latin Capital Letter A With Macron
35 {{u8"\u0100"}, {u8"\u0101"}},
36 // Latin Capital Letter L With Acute
37 {{u8"\u0139"}, {u8"\u013a"}},
38 // Cyrillic Capital Letter Ie
39 {{u8"\u0415"}, {u8"\u0435"}},
40 // Latin Capital Letter A With Circumflex And Grave
41 {{u8"\u1ea6"}, {u8"\u1ea7"}},
42 // Kelvin Sign
43 {{u8"\u212a"}, {u8"\u006b"}},
44 // Glagolitic Capital Letter Chrivi
45 {{u8"\u2c1d"}, {u8"\u2c4d"}},
46 // Fullwidth Latin Capital Letter M
47 {{u8"\uff2d"}, {u8"\uff4d"}},
48 // Old Hungarian Capital Letter Ej
49 {{u8"\U00010c92"}, {u8"\U00010cd2"}},
50 };
51
52 for (const TestCase &T : Tests) {
53 SCOPED_TRACE("Comparing '" + T.One + "' and '" + T.Two + "'");
54 EXPECT_EQ(caseFoldingDjbHash(T.One), caseFoldingDjbHash(T.Two));
55 }
56 }
57
TEST(DJBTest,knownValuesLowerCase)58 TEST(DJBTest, knownValuesLowerCase) {
59 struct TestCase {
60 StringLiteral Text;
61 uint32_t Hash;
62 };
63 static constexpr TestCase Tests[] = {
64 {{""}, 5381u},
65 {{"f"}, 177675u},
66 {{"fo"}, 5863386u},
67 {{"foo"}, 193491849u},
68 {{"foob"}, 2090263819u},
69 {{"fooba"}, 259229388u},
70 {{"foobar"}, 4259602622u},
71 {{"pneumonoultramicroscopicsilicovolcanoconiosis"}, 3999417781u},
72 };
73
74 for (const TestCase &T : Tests) {
75 SCOPED_TRACE("Text: '" + T.Text + "'");
76 EXPECT_EQ(T.Hash, djbHash(T.Text));
77 EXPECT_EQ(T.Hash, caseFoldingDjbHash(T.Text));
78 EXPECT_EQ(T.Hash, caseFoldingDjbHash(T.Text.upper()));
79 }
80 }
81
TEST(DJBTest,knownValuesUnicode)82 TEST(DJBTest, knownValuesUnicode) {
83 EXPECT_EQ(5866553u, djbHash(u8"\u0130"));
84 EXPECT_EQ(177678u, caseFoldingDjbHash(u8"\u0130"));
85 EXPECT_EQ(
86 1302161417u,
87 djbHash(
88 u8"\u0130\u0131\u00c0\u00e0\u0100\u0101\u0139\u013a\u0415\u0435\u1ea6"
89 u8"\u1ea7\u212a\u006b\u2c1d\u2c4d\uff2d\uff4d\U00010c92\U00010cd2"));
90 EXPECT_EQ(
91 1145571043u,
92 caseFoldingDjbHash(
93 u8"\u0130\u0131\u00c0\u00e0\u0100\u0101\u0139\u013a\u0415\u0435\u1ea6"
94 u8"\u1ea7\u212a\u006b\u2c1d\u2c4d\uff2d\uff4d\U00010c92\U00010cd2"));
95 }
96