Fix invalid IDs bug

src/lib.rs

@@ -207,9 +207,12 @@ impl Database {
 
             for index in 0..n {
                 match parse_face_info(source.clone(), data, index) {
-                    Ok(info) => {
-                        ids.push(info.id);
-                        self.push_face_info(info);
+                    Ok(mut info) => {
+                        let id = self.faces.insert_with_key(|k| {
+                            info.id = ID(k);
+                            info
+                        });
+                        ids.push(ID(id));
                     }
                     Err(e) => log::warn!(
                         "Failed to load a font face {} from source cause {}.",

tests/add_fonts.rs

@@ -0,0 +1,15 @@
+const DEMO_TTF: &[u8] = include_bytes!("./fonts/Tuffy.ttf");
+use std::sync::Arc;
+
+#[test]
+fn add_fonts_and_get_ids_back() {
+    env_logger::init();
+    let mut font_db = fontdb::Database::new();
+    let ids = font_db.load_font_source(fontdb::Source::Binary(Arc::new(DEMO_TTF)));
+
+    assert_eq!(ids.len(), 1);
+    let id = ids[0];
+
+    let font = font_db.face(id).unwrap();
+    assert!(font.families.iter().any(|(name, _)| name == "Tuffy"));
+}

tests/fonts/LICENSE.txt

@@ -0,0 +1,11 @@
+We, the copyright holders of this work, hereby release it into the
+public domain. This applies worldwide.
+
+In case this is not legally possible,
+
+We grant any entity the right to use this work for any purpose, without
+any conditions, unless such conditions are required by law.
+
+Thatcher Ulrich <tu@tulrich.com> http://tulrich.com
+Karoly Barta bartakarcsi@gmail.com
+Michael Evans http://www.evertype.com