check against errno

Author: moar55

libc/test/src/sys/mman/linux/CMakeLists.txt

@@ -198,4 +198,6 @@ add_libc_unittest(
     libc.include.signal
     libc.src.stdlib.exit
     libc.src.__support.OSUtil.osutil
-    libc.src.__support.threads.sleep)
+    libc.src.__support.threads.sleep
+    libc.test.UnitTest.ErrnoSetterMatcher
+    )

libc/test/src/sys/mman/linux/process_mrelease_test.cpp

@@ -14,10 +14,13 @@
 #include "src/sys/mman/process_mrelease.h"
 #include "src/unistd/close.h"
 #include "src/unistd/fork.h"
+#include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/LibcTest.h"
 
 #include <sys/syscall.h>
 
+using namespace LIBC_NAMESPACE::testing::ErrnoSetterMatcher;
+
 int pidfd_open(pid_t pid, unsigned int flags) {
   return LIBC_NAMESPACE::syscall_impl(SYS_pidfd_open, pid, flags);
 }
@@ -40,7 +43,7 @@ TEST(LlvmLibcMProcessMReleaseTest, NoError) {
     // Send SIGKILL to child process
     LIBC_NAMESPACE::kill(child_pid, SIGKILL);
 
-    EXPECT_EQ(LIBC_NAMESPACE::process_mrelease(pidfd, 0), 0);
+    EXPECT_THAT(LIBC_NAMESPACE::process_mrelease(pidfd, 0), Succeeds());
 
     LIBC_NAMESPACE::close(pidfd);
   }
@@ -60,13 +63,12 @@ TEST(LlvmLibcMProcessMReleaseTest, ErrorNotKilled) {
     int pidfd = pidfd_open(child_pid, 0);
     EXPECT_GE(pidfd, 0);
 
-    ASSERT_EQ(LIBC_NAMESPACE::process_mrelease(pidfd, 0), EINVAL);
+    EXPECT_THAT(LIBC_NAMESPACE::process_mrelease(pidfd, 0), Fails(EINVAL));
 
     LIBC_NAMESPACE::close(pidfd);
   }
 }
 
 TEST(LlvmLibcMProcessMReleaseTest, ErrorNonExistingPidfd) {
-
-  ASSERT_EQ(LIBC_NAMESPACE::process_mrelease(-1, 0), EBADF);
+  EXPECT_THAT(LIBC_NAMESPACE::process_mrelease(-1, 0), Fails(EBADF));
 }