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1 //===-- ErrnoSetterMatcher.h ------------------------------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLVM_LIBC_TEST_ERRNOSETTERMATCHER_H
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10 #define LLVM_LIBC_TEST_ERRNOSETTERMATCHER_H
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11
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12 #include "src/errno/llvmlibc_errno.h"
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13 #include "utils/UnitTest/Test.h"
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14
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15 namespace __llvm_libc {
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16 namespace testing {
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17
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18 namespace internal {
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19
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20 extern "C" const char *strerror(int);
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21
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22 template <typename T> class ErrnoSetterMatcher : public Matcher<T> {
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23 T ExpectedReturn;
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24 T ActualReturn;
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25 int ExpectedErrno;
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26 int ActualErrno;
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27
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28 public:
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29 ErrnoSetterMatcher(T ExpectedReturn, int ExpectedErrno)
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30 : ExpectedReturn(ExpectedReturn), ExpectedErrno(ExpectedErrno) {}
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31
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32 void explainError(testutils::StreamWrapper &OS) override {
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33 if (ActualReturn != ExpectedReturn)
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34 OS << "Expected return to be " << ExpectedReturn << " but got "
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35 << ActualReturn << ".\nExpecte errno to be " << strerror(ExpectedErrno)
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36 << " but got " << strerror(ActualErrno) << ".\n";
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37 else
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38 OS << "Correct value " << ExpectedReturn
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39 << " was returned\nBut errno was unexpectely set to "
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40 << strerror(ActualErrno) << ".\n";
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41 }
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42
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43 bool match(T Got) {
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44 ActualReturn = Got;
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45 ActualErrno = llvmlibc_errno;
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46 llvmlibc_errno = 0;
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47 return Got == ExpectedReturn && ActualErrno == ExpectedErrno;
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48 }
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49 };
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50
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51 } // namespace internal
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52
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53 namespace ErrnoSetterMatcher {
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54
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55 template <typename RetT = int>
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56 static internal::ErrnoSetterMatcher<RetT> Succeeds(RetT ExpectedReturn = 0,
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57 int ExpectedErrno = 0) {
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58 return {ExpectedReturn, ExpectedErrno};
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59 }
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60
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61 template <typename RetT = int>
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62 static internal::ErrnoSetterMatcher<RetT> Fails(int ExpectedErrno,
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63 RetT ExpectedReturn = -1) {
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64 return {ExpectedReturn, ExpectedErrno};
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65 }
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66
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67 } // namespace ErrnoSetterMatcher
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68
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69 } // namespace testing
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70 } // namespace __llvm_libc
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71
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72 #endif // LLVM_LIBC_TEST_ERRNOSETTERMATCHER_H
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