[WIP] Daemon & CLI

iota-cli/tests/button_layout.rs

@@ -0,0 +1,15 @@
+use iota_cli::controls::button::{button_minimum_width, horizontal_button_widths};
+
+#[test]
+fn width_allocation_handles_exact_spare_and_insufficient_space() {
+    assert_eq!(horizontal_button_widths(7, &[3, 4]), Some(vec![3, 4]));
+    assert_eq!(horizontal_button_widths(10, &[3, 4]), Some(vec![5, 5]));
+    assert_eq!(horizontal_button_widths(6, &[3, 4]), None);
+    assert_eq!(horizontal_button_widths(10, &[]), Some(Vec::new()));
+}
+
+#[test]
+fn minimum_width_uses_terminal_columns() {
+    assert_eq!(button_minimum_width("é"), 3);
+    assert_eq!(button_minimum_width("界"), 4);
+}