nowplaying: Give the autopause widgets {inc,dec}rement() functions

These will be used for keyboard accelerators to set the autopause value.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

emmental/nowplaying/autopause.py

@@ -91,6 +91,16 @@ class Entry(Gtk.Entry):
         self.set_icon_sensitive(Gtk.EntryIconPosition.SECONDARY,
                                 self.value < 99)
 
+    def decrement(self) -> None:
+        """Decrease the autopause count by 1."""
+        if self.value > -1:
+            self.value -= 1
+
+    def increment(self) -> None:
+        """Increase the autopause count by 1."""
+        if self.value < 99:
+            self.value += 1
+
 
 class Button(buttons.PopoverButton):
     """A PopoverButton that displays Autopause count."""
@@ -116,3 +126,11 @@ class Button(buttons.PopoverButton):
     def __notify_value(self, button: buttons.PopoverButton, param) -> None:
         text = str(self.value) if self.value > -1 else ""
         self._count.set_markup(f"<small>{text}</small>")
+
+    def decrement(self) -> None:
+        """Decrease the autopause value."""
+        self.popover_child.decrement()
+
+    def increment(self) -> None:
+        """Increase the autopause value."""
+        self.popover_child.increment()

tests/nowplaying/test_autopause.py

@@ -148,6 +148,26 @@ class TestAutopauseEntry(unittest.TestCase):
                 self.entry.emit("activate")
                 self.assertEqual(self.entry.value, value,  f"text=\"{text}\"")
 
+    def test_decrement(self):
+        """Test the decrement() function."""
+        self.entry.value = 1
+        self.entry.decrement()
+        self.assertEqual(self.entry.value, 0)
+        self.entry.decrement()
+        self.assertEqual(self.entry.value, -1)
+        self.entry.decrement()
+        self.assertEqual(self.entry.value, -1)
+
+    def test_increment(self):
+        """Test the increment() function."""
+        self.entry.value = 97
+        self.entry.increment()
+        self.assertEqual(self.entry.value, 98)
+        self.entry.increment()
+        self.assertEqual(self.entry.value, 99)
+        self.entry.increment()
+        self.assertEqual(self.entry.value, 99)
+
 
 class TestAutopauseButton(unittest.TestCase):
     """Test our Autopause Popover Button."""
@@ -194,3 +214,17 @@ class TestAutopauseButton(unittest.TestCase):
 
         self.button.value = -1
         self.assertEqual(self.button._count.get_text(), "")
+
+    def test_decrement(self):
+        """Test the decrement() function."""
+        with unittest.mock.patch.object(self.button.popover_child,
+                                        "decrement") as mock_decrement:
+            self.button.decrement()
+            mock_decrement.assert_called()
+
+    def test_increment(self):
+        """Test the increment() functions."""
+        with unittest.mock.patch.object(self.button.popover_child,
+                                        "increment") as mock_increment:
+            self.button.increment()
+            mock_increment.assert_called()