1df0dbfcb5
Summary: Having a consistent prefix makes selecting all of the llvm libc tests easier on any platform that is also using the gtest framework. This also modifies the TEST and TEST_F macros to enforce this change moving forward. Reviewers: sivachandra Subscribers:
98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
//===-- Unittests for strcmp ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/string/strcmp.h"
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#include "utils/UnitTest/Test.h"
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TEST(LlvmLibcStrCmpTest, EmptyStringsShouldReturnZero) {
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const char *s1 = "";
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const char *s2 = "";
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int result = __llvm_libc::strcmp(s1, s2);
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ASSERT_EQ(result, 0);
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// Verify operands reversed.
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result = __llvm_libc::strcmp(s2, s1);
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ASSERT_EQ(result, 0);
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}
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TEST(LlvmLibcStrCmpTest, EmptyStringShouldNotEqualNonEmptyString) {
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const char *empty = "";
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const char *s2 = "abc";
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int result = __llvm_libc::strcmp(empty, s2);
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// This should be '\0' - 'a' = -97
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ASSERT_EQ(result, -97);
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// Similar case if empty string is second argument.
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const char *s3 = "123";
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result = __llvm_libc::strcmp(s3, empty);
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// This should be '1' - '\0' = 49
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ASSERT_EQ(result, 49);
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}
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TEST(LlvmLibcStrCmpTest, EqualStringsShouldReturnZero) {
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const char *s1 = "abc";
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const char *s2 = "abc";
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int result = __llvm_libc::strcmp(s1, s2);
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ASSERT_EQ(result, 0);
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// Verify operands reversed.
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result = __llvm_libc::strcmp(s2, s1);
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ASSERT_EQ(result, 0);
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}
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TEST(LlvmLibcStrCmpTest, ShouldReturnResultOfFirstDifference) {
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const char *s1 = "___B42__";
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const char *s2 = "___C55__";
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int result = __llvm_libc::strcmp(s1, s2);
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// This should return 'B' - 'C' = -1.
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ASSERT_EQ(result, -1);
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// Verify operands reversed.
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result = __llvm_libc::strcmp(s2, s1);
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// This should return 'C' - 'B' = 1.
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ASSERT_EQ(result, 1);
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}
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TEST(LlvmLibcStrCmpTest, CapitalizedLetterShouldNotBeEqual) {
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const char *s1 = "abcd";
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const char *s2 = "abCd";
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int result = __llvm_libc::strcmp(s1, s2);
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// 'c' - 'C' = 32.
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ASSERT_EQ(result, 32);
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// Verify operands reversed.
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result = __llvm_libc::strcmp(s2, s1);
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// 'C' - 'c' = -32.
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ASSERT_EQ(result, -32);
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}
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TEST(LlvmLibcStrCmpTest, UnequalLengthStringsShouldNotReturnZero) {
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const char *s1 = "abc";
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const char *s2 = "abcd";
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int result = __llvm_libc::strcmp(s1, s2);
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// '\0' - 'd' = -100.
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ASSERT_EQ(result, -100);
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// Verify operands reversed.
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result = __llvm_libc::strcmp(s2, s1);
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// 'd' - '\0' = 100.
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ASSERT_EQ(result, 100);
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}
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TEST(LlvmLibcStrCmpTest, StringArgumentSwapChangesSign) {
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const char *a = "a";
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const char *b = "b";
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int result = __llvm_libc::strcmp(b, a);
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// 'b' - 'a' = 1.
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ASSERT_EQ(result, 1);
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result = __llvm_libc::strcmp(a, b);
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// 'a' - 'b' = -1.
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ASSERT_EQ(result, -1);
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}
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