tests: Executable for testing layouts

src/tests.rs

@@ -0,0 +1,78 @@
+/*! Testing functionality */
+
+use ::data::Layout;
+use xkbcommon::xkb;
+
+use ::util::WarningHandler;
+
+
+pub struct CountAndPrint(u32);
+
+impl WarningHandler for CountAndPrint {
+    fn handle(&mut self, warning: &str) {
+        self.0 = self.0 + 1;
+        println!("{}", warning);
+    }
+}
+
+impl CountAndPrint {
+    fn new() -> CountAndPrint {
+        CountAndPrint(0)
+    }
+}
+
+pub fn check_builtin_layout(name: &str) {
+    check_layout(Layout::from_resource(name).expect("Invalid layout data"))
+}
+
+pub fn check_layout_file(path: &str) {
+    check_layout(Layout::from_file(path.into()).expect("Invalid layout file"))
+}
+
+fn check_layout(layout: Layout) {
+    let handler = CountAndPrint::new();
+    let (layout, handler) = layout.build(handler);
+
+    if handler.0 > 0 {
+        println!("{} mistakes in layout", handler.0)
+    }
+
+    let layout = layout.expect("layout broken");
+
+    let context = xkb::Context::new(xkb::CONTEXT_NO_FLAGS);
+    
+    let keymap_str = layout.keymap_str
+        .clone()
+        .into_string().expect("Failed to decode keymap string");
+    
+    let keymap = xkb::Keymap::new_from_string(
+        &context,
+        keymap_str.clone(),
+        xkb::KEYMAP_FORMAT_TEXT_V1,
+        xkb::KEYMAP_COMPILE_NO_FLAGS,
+    ).expect("Failed to create keymap");
+
+    let state = xkb::State::new(&keymap);
+    
+    // "Press" each button with keysyms
+    for view in layout.views.values() {
+        for row in &view.rows {
+            for button in &row.buttons {
+                let keystate = button.state.borrow();
+                for keycode in &keystate.keycodes {
+                    match state.key_get_one_sym(*keycode) {
+                        xkb::KEY_NoSymbol => {
+                            eprintln!("{}", keymap_str);
+                            panic!("Keysym {} on key {:?} can't be resolved", keycode, button.name);
+                        },
+                        _ => {},
+                    }
+                }
+            }
+        }
+    }
+
+    if handler.0 > 0 {
+        panic!("Layout contains mistakes");
+    }
+}