Further test suite fixes for Singleton complications

src/seedsigner/controller.py

@@ -46,7 +46,17 @@ class Controller(Singleton):
 
 
     @classmethod
-    def configure_instance(cls, config=None):
+    def configure_instance(cls, config=None, disable_hardware=False):
+        """
+            - `disable_hardware` is only meant to be used by the test suite so that it
+            can keep re-initializing a Controller in however many tests it needs to. But
+            this is only possible if the hardware isn't already being reserved. Without
+            this you get:
+
+            RuntimeError: Conflicting edge detection already enabled for this GPIO channel
+
+            each time you try to re-initialize a Controller.
+        """
         # Must be called before the first get_instance() call
         if cls._instance:
             raise Exception("Instance already configured")
@@ -56,7 +66,10 @@ class Controller(Singleton):
         cls._instance = controller
 
         # Input Buttons
-        controller.buttons = Buttons()
+        if disable_hardware:
+            controller.buttons = None
+        else:
+            controller.buttons = Buttons()
 
         # models
         controller.storage = SeedStorage()

src/seedsigner/models/settings.py

@@ -48,6 +48,8 @@ class Settings(Singleton):
         settings.init_complete = True
 
     def __config_to_data(self, config):
+        # TODO: Make each get resilient to the possibility of the field being missing in
+        # the `settings.ini`
         self.persistent = config.getboolean("system", "persistent_settings")
         self._data["system"]["debug"] = config.getboolean("system", "debug")
         self._data["system"]["default_language"] = config["system"]["default_language"]
@@ -58,7 +60,9 @@ class Settings(Singleton):
         self.software = config["wallet"]["software"]
         self.qr_density = int(config["wallet"]["qr_density"])
         self.custom_derivation = config["wallet"]["custom_derivation"]
-        self.compact_seedqr_enabled = config.getboolean("wallet", "compact_seedqr_enabled")
+
+        if "compact_seedqr_enabled"in config["wallet"]:
+            self.compact_seedqr_enabled = config.getboolean("wallet", "compact_seedqr_enabled")
 
     ### persistent settings handling
 

src/seedsigner/views/view.py

@@ -94,6 +94,8 @@ class View:
         # 240x240 display with hardware SPI:
         View.bus = 0
         View.device = 0
+
+        # TODO: Add `disable_hardware` option for test suite here, too?
         View.disp = ST7789(SPI.SpiDev(View.bus, View.device),View.RST, View.DC, View.BL)
         View.disp.Init()
 

tests/test_controller.py

@@ -2,6 +2,7 @@ import configparser
 import pytest
 from mock import MagicMock
 from seedsigner.controller import Controller
+from seedsigner.models.settings import Settings
 
 
 
@@ -39,7 +40,7 @@ def test_singleton_get_instance_preserves_state():
     config.read_string(settings)
 
     # Initialize the instance and verify that it read the config settings
-    Controller.configure_instance(config)
+    Controller.configure_instance(config, disable_hardware=True)
     controller = Controller.get_instance()
     assert controller.color == "ORANGE"
 
@@ -49,3 +50,41 @@ def test_singleton_get_instance_preserves_state():
     # ...get a new copy of the instance and confirm change
     controller = Controller.get_instance()
     assert controller.color == "purple"
+
+
+def test_missing_settings_get_defaults():
+    """ Should gracefully handle any missing fields from `settings.ini` """
+    # TODO: This is not complete; currently only handles missing compact_seedqr_enabled.
+
+    # Must reset Singleton instances; pytest cannot properly isolate Singletons for us
+    # automatically.
+    Settings._instance = None
+    Controller._instance = None
+
+    # Intentionally omit `compact_seedqr_enabled` from settings:
+    settings = """
+        [system]
+        debug = False
+        default_language = en
+        persistent_settings = False
+
+        [display]
+        text_color = ORANGE
+        qr_background_color = FFFFFF
+        camera_rotation = 0
+
+        [wallet]
+        network = main
+        software = Prompt
+        qr_density = 2
+        custom_derivation = m/0/0
+    """
+    config = configparser.ConfigParser()
+    config.read_string(settings)
+
+    # Controller should parse the settings fine, even though a field is missing
+    Controller.configure_instance(config, disable_hardware=True)
+
+    # Controller should still have a default value
+    controller = Controller.get_instance()
+    assert controller.settings.compact_seedqr_enabled is False