Fix EmbedMediaProxy boolean check

Author: AbstractUmbra

discord/embeds.py

@@ -61,6 +61,12 @@ def __init__(self, layer: Dict[str, Any]):
         super().__init__(layer)
         self._flags = self.__dict__.pop('flags', 0)
 
+    def __bool__(self) -> bool:
+        # This is a nasty check to see if we only have the `_flags` attribute which is created regardless in init.
+        # Had we had any of the other items, like image/video data this would be >1 and therefor
+        # would not be "empty".
+        return len(self.__dict__) > 1
+
     @property
     def flags(self) -> AttachmentFlags:
         return AttachmentFlags._from_value(self._flags or 0)

tests/test_embed.py

@@ -267,3 +267,14 @@ def test_embed_colour_setter_failure(value):
     embed = discord.Embed()
     with pytest.raises(TypeError):
         embed.colour = value
+
+@pytest.mark.parametrize(
+    ('title', 'return_val'),
+    [
+        ('test', True),
+        (None, False)
+    ]
+)
+def test_embed_truthiness(title: str, return_val: bool) -> None:
+    embed = discord.Embed(title=title)
+    assert bool(embed) is return_val