1 files changed, 30 insertions, 0 deletions
diff --git a/test/src/stdbit/stdc_bit_ceil_ui_test.cpp b/test/src/stdbit/stdc_bit_ceil_ui_test.cpp
new file mode 100644
index 000000000000..3b6f2a564ff1
--- /dev/null
+++ b/test/src/stdbit/stdc_bit_ceil_ui_test.cpp
@@ -0,0 +1,30 @@
+//===-- Unittests for stdc_bit_ceil_ui ------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/__support/CPP/limits.h"
+#include "src/stdbit/stdc_bit_ceil_ui.h"
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibcStdcBitceilUiTest, Zero) {
+  EXPECT_EQ(LIBC_NAMESPACE::stdc_bit_ceil_ui(0U), 1U);
+}
+
+TEST(LlvmLibcStdcBitceilUiTest, Ones) {
+  for (unsigned i = 0U; i != UINT_WIDTH; ++i)
+    EXPECT_EQ(LIBC_NAMESPACE::stdc_bit_ceil_ui(1U << i), 1U << i);
+}
+
+TEST(LlvmLibcStdcBitceilUiTest, OneLessThanPowsTwo) {
+  for (unsigned i = 2U; i != UINT_WIDTH; ++i)
+    EXPECT_EQ(LIBC_NAMESPACE::stdc_bit_ceil_ui((1U << i) - 1), 1U << i);
+}
+
+TEST(LlvmLibcStdcBitceilUiTest, OneMoreThanPowsTwo) {
+  for (unsigned i = 1U; i != UINT_WIDTH - 1; ++i)
+    EXPECT_EQ(LIBC_NAMESPACE::stdc_bit_ceil_ui((1U << i) + 1), 1U << (i + 1));
+}