af1315c28f
This part of the effort to make all test related pieces into the `test` directory. This helps is excluding test related pieces in a straight forward manner if LLVM_INCLUDE_TESTS is OFF. Future patches will also move the MPFR wrapper and testutils into the 'test' directory.
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
//===-- Unittests for stpncpy ---------------------------------------------===//
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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/__support/CPP/span.h"
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#include "src/string/stpncpy.h"
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#include "test/UnitTest/Test.h"
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#include <stddef.h> // For size_t.
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class LlvmLibcStpncpyTest : public __llvm_libc::testing::Test {
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public:
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void check_stpncpy(__llvm_libc::cpp::span<char> dst,
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const __llvm_libc::cpp::span<const char> src, size_t n,
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const __llvm_libc::cpp::span<const char> expected,
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size_t expectedCopied) {
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// Making sure we don't overflow buffer.
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ASSERT_GE(dst.size(), n);
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// Making sure stpncpy returns a pointer to the end of dst.
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ASSERT_EQ(__llvm_libc::stpncpy(dst.data(), src.data(), n),
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dst.data() + expectedCopied);
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// Expected must be of the same size as dst.
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ASSERT_EQ(dst.size(), expected.size());
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// Expected and dst are the same.
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for (size_t i = 0; i < expected.size(); ++i)
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ASSERT_EQ(expected[i], dst[i]);
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}
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};
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TEST_F(LlvmLibcStpncpyTest, Untouched) {
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char dst[] = {'a', 'b'};
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const char src[] = {'x', '\0'};
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const char expected[] = {'a', 'b'};
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check_stpncpy(dst, src, 0, expected, 0);
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}
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TEST_F(LlvmLibcStpncpyTest, CopyOne) {
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char dst[] = {'a', 'b'};
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const char src[] = {'x', 'y'};
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const char expected[] = {'x', 'b'}; // no \0 is appended
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check_stpncpy(dst, src, 1, expected, 1);
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}
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TEST_F(LlvmLibcStpncpyTest, CopyNull) {
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char dst[] = {'a', 'b'};
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const char src[] = {'\0', 'y'};
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const char expected[] = {'\0', 'b'};
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check_stpncpy(dst, src, 1, expected, 0);
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}
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TEST_F(LlvmLibcStpncpyTest, CopyPastSrc) {
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char dst[] = {'a', 'b'};
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const char src[] = {'\0', 'y'};
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const char expected[] = {'\0', '\0'};
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check_stpncpy(dst, src, 2, expected, 0);
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}
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TEST_F(LlvmLibcStpncpyTest, CopyTwoNoNull) {
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char dst[] = {'a', 'b'};
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const char src[] = {'x', 'y'};
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const char expected[] = {'x', 'y'};
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check_stpncpy(dst, src, 2, expected, 2);
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}
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TEST_F(LlvmLibcStpncpyTest, CopyTwoWithNull) {
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char dst[] = {'a', 'b'};
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const char src[] = {'x', '\0'};
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const char expected[] = {'x', '\0'};
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check_stpncpy(dst, src, 2, expected, 1);
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}
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