Update status_code to uint16_t and add HTTP response tests

Change status_code type from uint8_t to uint16_t for better range handling. Add tests for rendering HTTP 404 response with no body and 200 response with a JSON body to ensure proper functionality.

src/tiny_http/tiny_http_server_lib.h

@@ -39,7 +39,7 @@ typedef struct http_request {
 
 typedef struct http_response {
     http_version version;
-    uint8_t status_code;
+    uint16_t status_code;
     uint8_t *reason_phrase;
     http_header *headers;
     size_t headers_cnt;

test/assert_tiny_http_server_lib.c

@@ -137,7 +137,7 @@ void test_response_render_200_no_body(void) {
     const http_response response = {
         .version = HTTP_1_0,
         .status_code = 200,
-        .reason_phrase = "OK",
+        .reason_phrase = (uint8_t *) "OK",
     };
     uint8_t *response_octets = nullptr;
     size_t response_octets_len = 0;
@@ -148,13 +148,66 @@ void test_response_render_200_no_body(void) {
     assert(strncmp((char *) response_octets, "HTTP/1.0 200 OK\r\n", 32) == 0);
 }
 
+void test_response_render_404_no_body(void) {
+    const http_response response = {
+        .version = HTTP_1_0,
+        .status_code = 404,
+        .reason_phrase = (uint8_t *) "Not Found",
+    };
+    uint8_t *response_octets = nullptr;
+    size_t response_octets_len = 0;
+    const enum render_http_response_status response_code = render_http_response(
+        &response, &response_octets, &response_octets_len);
+    assert(response_code == RENDER_OK);
+    assert(response_octets_len > 0);
+    assert(strncmp((char *) response_octets, "HTTP/1.0 404 Not Found\r\n", 32) == 0);
+}
+
+void test_response_render_200_with_body(void) {
+    {
+        http_response response = {
+            .version = HTTP_1_0,
+            .status_code = 200,
+            .reason_phrase = (uint8_t *) "OK",
+            .headers_cnt = 2,
+            .body = (uint8_t *) "{\n    \"key1\": \"value1\",\n    \"key2\": \"value2\"\n}",
+            .body_len = 48
+        };
+        response.headers = malloc(sizeof(struct http_header) * response.headers_cnt);
+        response.headers[0].name = "Content-Type";
+        response.headers[0].value = "application/json";
+        response.headers[1].name = "Content-Length";
+        response.headers[1].value = "48";
+
+        uint8_t *response_octets = nullptr;
+        size_t response_octets_len = 0;
+
+        const enum render_http_response_status response_code = render_http_response(
+            &response, &response_octets, &response_octets_len);
+
+        assert(response_code == RENDER_OK);
+        assert(response_octets_len > 0);
+
+        const char *expected_response = "HTTP/1.0 200 OK\r\n"
+                "Content-Type: application/json\r\n"
+                "Content-Length: 48\r\n"
+                "\r\n"
+                "{\n    \"key1\": \"value1\",\n    \"key2\": \"value2\"\n}";
+        assert(strncmp((char *)response_octets, expected_response, response_octets_len) == 0);
+        assert(strnlen((char *) response_octets, response_octets_len + 8) == response_octets_len);
+        free(response_octets);
+    }
+}
+
 int main() {
     test_request_parse_get_root_curl();
     test_request_post_root_curl();
     test_request_post_root_curl_with_wide_chars();
     test_request_parse_head();
 
     test_response_render_200_no_body();
+    test_response_render_404_no_body();
+    test_response_render_200_with_body();
 
     return EXIT_SUCCESS;
 }