LibC: Implement wctype

2 files changed, 31 insertions, 0 deletions

diff --git a/Tests/LibC/CMakeLists.txt b/Tests/LibC/CMakeLists.txt
index daec9dae63..ca4570358d 100644
--- a/Tests/LibC/CMakeLists.txt
+++ b/Tests/LibC/CMakeLists.txt
@@ -15,6 +15,7 @@ set(TEST_SOURCES
     TestStackSmash.cpp
     TestStrlcpy.cpp
     TestStrtodAccuracy.cpp
+    TestWctype.cpp
 )
 
 set_source_files_properties(TestStrtodAccuracy.cpp PROPERTIES COMPILE_FLAGS "-fno-builtin-strtod")
diff --git a/Tests/LibC/TestWctype.cpp b/Tests/LibC/TestWctype.cpp
new file mode 100644
index 0000000000..190d152f6d
--- /dev/null
+++ b/Tests/LibC/TestWctype.cpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+#include <wctype.h>
+
+TEST_CASE(wctype)
+{
+    // Test that existing properties return non-zero wctypes.
+    EXPECT(wctype("alnum") != 0);
+    EXPECT(wctype("alpha") != 0);
+    EXPECT(wctype("blank") != 0);
+    EXPECT(wctype("cntrl") != 0);
+    EXPECT(wctype("digit") != 0);
+    EXPECT(wctype("graph") != 0);
+    EXPECT(wctype("lower") != 0);
+    EXPECT(wctype("print") != 0);
+    EXPECT(wctype("punct") != 0);
+    EXPECT(wctype("space") != 0);
+    EXPECT(wctype("upper") != 0);
+    EXPECT(wctype("xdigit") != 0);
+
+    // Test that invalid properties return the "invalid" wctype (0).
+    EXPECT(wctype("") == 0);
+    EXPECT(wctype("abc") == 0);
+}