From 2e9348181de1b5ceb0599e59dff4371d03cf9993 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Sun, 6 Nov 2022 19:51:56 +0100
Subject: [PATCH] Tests: Add tests for strcmp() and strncmp()

---
 tests/libc/Test.c   |  4 ++++
 tests/libc/string.c | 48 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/tests/libc/Test.c b/tests/libc/Test.c
index ba08faf9..cba4b5bc 100644
--- a/tests/libc/Test.c
+++ b/tests/libc/Test.c
@@ -8,6 +8,8 @@ DEFINE_TEST(memcmp);
 DEFINE_TEST(memmove);
 DEFINE_TEST(strlen);
 DEFINE_TEST(strnlen);
+DEFINE_TEST(strcmp);
+DEFINE_TEST(strncmp);
 DEFINE_TEST(strcspn);
 DEFINE_TEST(strspn);
 DEFINE_TEST(strchr);
@@ -38,6 +40,8 @@ int main()
     RUN_TEST(memmove);
     RUN_TEST(strlen);
     RUN_TEST(strnlen);
+    RUN_TEST(strcmp);
+    RUN_TEST(strncmp);
     RUN_TEST(strcspn);
     RUN_TEST(strspn);
     RUN_TEST(strchr);
diff --git a/tests/libc/string.c b/tests/libc/string.c
index bd50a930..30a3554e 100644
--- a/tests/libc/string.c
+++ b/tests/libc/string.c
@@ -166,6 +166,54 @@ DEFINE_TEST(strnlen)
     TEST_SUCCESS();
 }
 
+DEFINE_TEST(strcmp)
+{
+    START_TEST(strcmp);
+
+    const char* str1 = "Hello, World!";
+    const char* str2 = "Hello, Planet!";
+
+    int rc = strcmp(str1, str1);
+
+    EXPECT_EQ(rc, 0);
+
+    rc = strcmp(str1, str2);
+
+    EXPECT(rc > 0);
+
+    rc = strcmp(str2, str1);
+
+    EXPECT(rc < 0);
+
+    TEST_SUCCESS();
+}
+
+DEFINE_TEST(strncmp)
+{
+    START_TEST(strncmp);
+
+    const char* str1 = "Hello, World!";
+    const char* str2 = "Hello, Planet!";
+
+    int rc = strncmp(str1, str1, 14);
+
+    EXPECT_EQ(rc, 0);
+
+    rc = strncmp(str1, str2, 14);
+
+    EXPECT(rc > 0);
+
+    rc = strncmp(str2, str1, 14);
+
+    EXPECT(rc < 0);
+
+    rc = strncmp(str1, str2, 6);
+
+    EXPECT_EQ(rc, 0);
+
+    TEST_SUCCESS();
+}
+
 DEFINE_TEST(strcspn)
 {
     START_TEST(strcspn);