Add comment to run_test method

Author: LaurenzV

tests/scripts/gen-tests.py

@@ -111,9 +111,6 @@ def main():
             if str(test_file.svg_path()) in IGNORE_TESTS:
                 test_string += f"// {IGNORE_TESTS[str(test_file.svg_path())]}\n"
                 test_string += "#[ignore] "
-            elif not test_file.has_ref():
-                test_string += f"// unknown reason\n"
-                test_string += "#[ignore] "
 
             test_string += "#[test] "
 

tests/src/lib.rs

@@ -114,11 +114,16 @@ fn is_pix_diff(pixel1: &Rgba<u8>, pixel2: &Rgba<u8>) -> bool {
 /// Runs a single test instance.
 pub fn run_test(svg_path: &str, ref_path: &str, diff_path: &str, replace: bool) -> i32 {
     let (_, actual_image) = convert_svg(&fs::read_to_string(svg_path).unwrap());
+
+    // Just as a convenience, if the test is supposed to run but there doesn't exist
+    // a reference image yet, we create a new one. This allows us to conveniently generate
+    // new reference images for test cases.
     if !Path::new(ref_path).exists() {
         fs::create_dir_all(Path::new(ref_path).parent().unwrap()).unwrap();
         save_image(&actual_image, Path::new(ref_path));
-        return 0;
+        return 1;
     }
+
     let expected_image = Reader::open(ref_path).unwrap().decode().unwrap().into_rgba8();
 
     let width = max(expected_image.width(), actual_image.width());