1 files changed, 50 insertions, 0 deletions
diff --git a/tests/common/test_contracts.c b/tests/common/test_contracts.c
index 654eb1e..d1964ff 100644
--- a/tests/common/test_contracts.c
+++ b/tests/common/test_contracts.c
@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 200809L
 #include "common/backend.h"
 #include "common/input.h"
 #include "common/timing.h"
@@ -5,8 +6,10 @@
 #include <assert.h>
 #include <errno.h>
 #include <math.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 static void test_timing_clock(void)
 {
@@ -182,6 +185,52 @@ static void test_held_buttons(void)
     input_queue_clear(&q);
 }
 
+static void test_drop_paths(void)
+{
+    char host[256] = "";
+    assert(gethostname(host, sizeof(host)) == 0);
+    char list[1024];
+    snprintf(list, sizeof(list),
+        "# comment\r\n"
+        "\r\n"
+        "file:///home/user/a%%20b.txt\r\n"
+        "https://example.com/x\r\n"
+        "file://elsewhere.invalid/remote\r\n"
+        "file://localhost/tmp/%%C3%%A9t%%C3%%A9  \r\n"
+        "file://%s/srv/x\r\n"
+        "FILE:/single/slash\n"
+        "file:///bad%%2\r\n"
+        "file:///nul%%00byte\r\n"
+        "file:///q?query#frag\r\n"
+        "file:relative\r\n"
+        "file:///last",
+        host);
+    static const char *const want[] = {
+        "/home/user/a b.txt", "/tmp/\xc3\xa9t\xc3\xa9", "/srv/x", "/single/slash",
+        "/q", "/last",
+    };
+    const char *cursor = list;
+    char path[64];
+    for (size_t i = 0; i < sizeof(want) / sizeof(want[0]); i++) {
+        size_t len = strlen(want[i]);
+        /* A short buffer reports the length and leaves both outputs alone. */
+        const char *before = cursor;
+        memcpy(path, "keep", 5);
+        assert(yasl_drop_next_path(&cursor, path, len) == len);
+        assert(cursor == before && strcmp(path, "keep") == 0);
+        assert(yasl_drop_next_path(&cursor, NULL, 0) == len && cursor == before);
+        assert(yasl_drop_next_path(&cursor, path, sizeof(path)) == len);
+        assert(strcmp(path, want[i]) == 0);
+    }
+    assert(yasl_drop_next_path(&cursor, path, sizeof(path)) == 0 && *cursor == '\0');
+    assert(yasl_drop_next_path(&cursor, path, sizeof(path)) == 0);
+    assert(yasl_drop_next_path(NULL, path, sizeof(path)) == 0);
+    const char *none = NULL;
+    assert(yasl_drop_next_path(&none, path, sizeof(path)) == 0);
+    cursor = list;
+    assert(yasl_drop_next_path(&cursor, NULL, 8) == 0 && cursor == list);
+}
+
 static void test_native(void)
 {
     const struct yasl_backend_ops ops = {.display_caps = native_caps,
@@ -372,6 +421,7 @@ int main(void)
     test_surface_state();
     test_queue();
     test_held_buttons();
+    test_drop_paths();
     test_validation();
     test_native();
     test_scale();