test: write Windows fixtures byte-exactly

Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>

tests/test_cli.c

@@ -30,7 +30,7 @@
 
 /* Helper: create a file with content */
 static int write_test_file(const char *path, const char *content) {
-    FILE *f = fopen(path, "w");
+    FILE *f = cbm_fopen(path, "wb");
     if (!f)
         return -1;
     fprintf(f, "%s", content);

tests/test_helpers.h

@@ -54,7 +54,7 @@ static inline int th_write_file(const char *path, const char *content) {
         cbm_mkdir_p(dir, 0755);
     }
 
-    FILE *f = fopen(path, "w");
+    FILE *f = cbm_fopen(path, "wb");
     if (!f) {
         return -1;
     }
@@ -67,7 +67,7 @@ static inline int th_write_file(const char *path, const char *content) {
 
 /* Append content to a file. */
 static inline int th_append_file(const char *path, const char *content) {
-    FILE *f = fopen(path, "a");
+    FILE *f = cbm_fopen(path, "ab");
     if (!f) {
         return -1;
     }

tests/test_security.c

@@ -49,6 +49,21 @@ static char *security_read_file(const char *path) {
     return content;
 }
 
+static void security_normalize_crlf(char *content) {
+    if (!content) {
+        return;
+    }
+    char *read_cursor = content;
+    char *write_cursor = content;
+    while (*read_cursor) {
+        if (read_cursor[0] == '\r' && read_cursor[1] == '\n') {
+            read_cursor++;
+        }
+        *write_cursor++ = *read_cursor++;
+    }
+    *write_cursor = '\0';
+}
+
 TEST(vendored_integrity_manifest_is_relocatable_and_fail_closed) {
     FILE *checksums = fopen("scripts/vendored-checksums.txt", "r");
     ASSERT_NOT_NULL(checksums);
@@ -68,6 +83,7 @@ TEST(vendored_integrity_manifest_is_relocatable_and_fail_closed) {
 
     char *script = security_read_file("scripts/security-vendored.sh");
     ASSERT_NOT_NULL(script);
+    security_normalize_crlf(script);
     ASSERT_NOT_NULL(strstr(script, "MISSING=$((MISSING + 1))\n        CONTENT_DRIFT=1"));
     ASSERT_NOT_NULL(
         strstr(script,