1 files changed, 33 insertions, 4 deletions
diff --git a/test/src/sys/epoll/linux/epoll_wait_test.cpp b/test/src/sys/epoll/linux/epoll_wait_test.cpp
index 57fef3f690b6..f9e855a891b0 100644
--- a/test/src/sys/epoll/linux/epoll_wait_test.cpp
+++ b/test/src/sys/epoll/linux/epoll_wait_test.cpp
@@ -5,16 +5,45 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
+#include "hdr/sys_epoll_macros.h"
+#include "hdr/types/struct_epoll_event.h"
 #include "src/errno/libc_errno.h"
+#include "src/sys/epoll/epoll_create1.h"
+#include "src/sys/epoll/epoll_ctl.h"
 #include "src/sys/epoll/epoll_wait.h"
+#include "src/unistd/close.h"
+#include "src/unistd/pipe.h"
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
 using namespace LIBC_NAMESPACE::testing::ErrnoSetterMatcher;
 
 TEST(LlvmLibcEpollWaitTest, Basic) {
-  EXPECT_THAT(LIBC_NAMESPACE::epoll_wait(-1, nullptr, 0, 0),
-              returns(EQ(-1ul)).with_errno(EQ(EINVAL)));
-}
+  int epfd = LIBC_NAMESPACE::epoll_create1(0);
+  ASSERT_GT(epfd, 0);
+  ASSERT_ERRNO_SUCCESS();
+
+  int pipefd[2];
+
+  ASSERT_THAT(LIBC_NAMESPACE::pipe(pipefd), Succeeds());
+
+  epoll_event event;
+  event.events = EPOLLOUT;
+  event.data.fd = pipefd[0];
+
+  ASSERT_THAT(LIBC_NAMESPACE::epoll_ctl(epfd, EPOLL_CTL_ADD, pipefd[0], &event),
+              Succeeds());
 
-// TODO: Complete these tests when epoll_create is implemented.
+  // Timeout of 0 causes immediate return. We just need to check that the
+  // interface works, we're not testing the kernel behavior here.
+  ASSERT_THAT(LIBC_NAMESPACE::epoll_wait(epfd, &event, 1, 0), Succeeds());
+
+  ASSERT_THAT(LIBC_NAMESPACE::epoll_wait(-1, &event, 1, 0), Fails(EBADF));
+
+  ASSERT_THAT(LIBC_NAMESPACE::epoll_ctl(epfd, EPOLL_CTL_DEL, pipefd[0], &event),
+              Succeeds());
+
+  ASSERT_THAT(LIBC_NAMESPACE::close(pipefd[0]), Succeeds());
+  ASSERT_THAT(LIBC_NAMESPACE::close(pipefd[1]), Succeeds());
+  ASSERT_THAT(LIBC_NAMESPACE::close(epfd), Succeeds());
+}