label_printer/test_gui_layout.py

"""
Headless test of the two-column GUI.

Instantiates the real app class and drives its handlers without opening a window,
so layout wiring and settings logic are verified automatically rather than by
looking at the screen.
"""

import os
import sys

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
os.chdir(os.path.dirname(os.path.abspath(__file__)))

# Keep Kivy from parsing our argv; the real window backend is used but the app
# event loop is never started, so nothing is displayed.
os.environ.setdefault("KIVY_NO_ARGS", "1")


def main() -> int:
    import label_printer_ptouch_gui as gui

    print("1. Window is a 600 x 300 landscape panel")
    print(f"   WINDOW_SIZE : {gui.WINDOW_SIZE}")
    landscape = gui.WINDOW_SIZE[0] > gui.WINDOW_SIZE[1]
    print(f"   landscape   : {landscape}  {'PASS' if landscape else 'FAIL'}")

    print("\n2. App.config is not shadowed (the bug that crashed the settings panel)")
    app = gui.PtouchPrinterApp()
    has_collision = "config" in vars(app) and not hasattr(vars(app)["config"], "get")
    print(f"   app.config  : {type(app.config).__name__}")
    print(f"   label_cfg   : {type(app.label_cfg).__name__}")
    cfg_ok = type(app.label_cfg).__name__ == "LabelConfig"
    print(f"   config valid: {cfg_ok}  {'PASS' if cfg_ok else 'FAIL'}")

    print("\n3. Two-column root layout")
    root = app.build()
    print(f"   orientation : {root.orientation}")
    print(f"   columns     : {len(root.children)}")
    cols_ok = root.orientation == "horizontal" and len(root.children) == 2
    print(f"   {'PASS' if cols_ok else 'FAIL'}")

    # Children are in reverse order of addition: preview column first, then controls.
    preview_col, controls = root.children
    print(f"   controls col: {controls.orientation}, {len(controls.children)} items")
    print(f"   preview col : {preview_col.orientation}, {len(preview_col.children)} items")

    print("\n4. Required widgets exist")
    for name in (
        "inventory_input",
        "printer_spinner",
        "print_button",
        "preview",
        "status_label",
    ):
        present = hasattr(app, name)
        print(f"   {name:<18}: {'yes' if present else 'NO'}")
        if not present:
            return 1

    print("\n5. Settings handlers are reachable (would have raised before)")
    # Accessing these properties is what failed previously.
    _ = app.label_cfg.logo_path
    _ = app.label_cfg.static_lines
    _ = app.label_cfg.qr_prefix
    _ = app.label_cfg.qr_suffix
    _ = app.label_cfg.qr_error_correction
    print("   loaded without error: PASS")

    print("\n6. Preview render works headless")
    app.update_preview()
    print(f"   status text : {app.status_label.text!r}")
    print(f"   texture set : {app.preview._texture is not None}")

    print("\n7. QR payload is built from the inventory field")
    app.inventory_input.text = "INV-42"
    app.update_preview()
    print(f"   status text : {app.status_label.text!r}")
    payload_ok = "INV-42" in app.status_label.text
    print(f"   reflects field: {payload_ok}  {'PASS' if payload_ok else 'FAIL'}")

    print("\n" + "=" * 62)
    passed = landscape and cfg_ok and cols_ok and payload_ok
    print("RESULT:", "PASS" if passed else "FAIL")
    return 0 if passed else 1


if __name__ == "__main__":
    raise SystemExit(main())