[libc] Move all tests to a top level `test` directory.

A toplevel target, `check-libc` has also been added.

Reviewers: abrachet, phosek

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D72177

3 files changed, 98 insertions, 0 deletions

diff --git a/libc/test/src/string/CMakeLists.txt b/libc/test/src/string/CMakeLists.txt
new file mode 100644
index 00000000000..bc5c088d169
--- /dev/null
+++ b/libc/test/src/string/CMakeLists.txt
@@ -0,0 +1,23 @@
+add_custom_target(libc_string_unittests)
+add_dependencies(check_libc libc_string_unittests)
+
+add_libc_unittest(
+  strcat_test
+  SUITE
+    libc_string_unittests
+  SRCS
+    strcat_test.cpp
+  DEPENDS
+    strcat
+    strcpy
+)
+
+add_libc_unittest(
+  strcpy_test
+  SUITE
+    libc_string_unittests
+  SRCS
+    strcpy_test.cpp
+  DEPENDS
+    strcpy
+)
diff --git a/libc/test/src/string/strcat_test.cpp b/libc/test/src/string/strcat_test.cpp
new file mode 100644
index 00000000000..3b8a7a7e447
--- /dev/null
+++ b/libc/test/src/string/strcat_test.cpp
@@ -0,0 +1,39 @@
+//===---------------------- Unittests for strcat --------------------------===//
+//
+// 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 <string>
+
+#include "src/string/strcat/strcat.h"
+#include "gtest/gtest.h"
+
+TEST(StrCatTest, EmptyDest) {
+  std::string abc = "abc";
+  char dest[4];
+
+  dest[0] = '\0';
+
+  char *result = __llvm_libc::strcat(dest, abc.c_str());
+  ASSERT_EQ(dest, result);
+  ASSERT_EQ(std::string(dest), abc);
+  ASSERT_EQ(std::string(dest).size(), abc.size());
+}
+
+TEST(StrCatTest, NonEmptyDest) {
+  std::string abc = "abc";
+  char dest[7];
+
+  dest[0] = 'x';
+  dest[1] = 'y';
+  dest[2] = 'z';
+  dest[3] = '\0';
+
+  char *result = __llvm_libc::strcat(dest, abc.c_str());
+  ASSERT_EQ(dest, result);
+  ASSERT_EQ(std::string(dest), std::string("xyz") + abc);
+  ASSERT_EQ(std::string(dest).size(), abc.size() + 3);
+}
diff --git a/libc/test/src/string/strcpy_test.cpp b/libc/test/src/string/strcpy_test.cpp
new file mode 100644
index 00000000000..e68ea5103db
--- /dev/null
+++ b/libc/test/src/string/strcpy_test.cpp
@@ -0,0 +1,36 @@
+//===----------------------- Unittests for strcpy -------------------------===//
+//
+// 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 <string>
+
+#include "src/string/strcpy/strcpy.h"
+#include "gtest/gtest.h"
+
+TEST(StrCpyTest, EmptyDest) {
+  std::string abc = "abc";
+  char dest[4];
+
+  char *result = __llvm_libc::strcpy(dest, abc.c_str());
+  ASSERT_EQ(dest, result);
+  ASSERT_EQ(std::string(dest), abc);
+  ASSERT_EQ(std::string(dest).size(), abc.size());
+}
+
+TEST(StrCpyTest, OffsetDest) {
+  std::string abc = "abc";
+  char dest[7];
+
+  dest[0] = 'x';
+  dest[1] = 'y';
+  dest[2] = 'z';
+
+  char *result = __llvm_libc::strcpy(dest + 3, abc.c_str());
+  ASSERT_EQ(dest + 3, result);
+  ASSERT_EQ(std::string(dest), std::string("xyz") + abc);
+  ASSERT_EQ(std::string(dest).size(), abc.size() + 3);
+}