1 files changed, 35 insertions, 0 deletions
diff --git a/tests/test_protocol.py b/tests/test_protocol.py
new file mode 100644
index 0000000..310b994
--- /dev/null
+++ b/tests/test_protocol.py
@@ -0,0 +1,35 @@
+import io
+
+from rich.abc import RichRenderable
+from rich.console import Console
+from rich.panel import Panel
+from rich.text import Text
+
+
+class Foo:
+    def __rich__(self) -> Text:
+        return Text("Foo")
+
+
+def test_rich_cast():
+    foo = Foo()
+    console = Console(file=io.StringIO())
+    console.print(foo)
+    assert console.file.getvalue() == "Foo\n"
+
+
+def test_rich_cast_container():
+    foo = Foo()
+    console = Console(file=io.StringIO(), legacy_windows=False)
+    console.print(Panel.fit(foo, padding=0))
+    assert console.file.getvalue() == "╭───╮\n│Foo│\n╰───╯\n"
+
+
+def test_abc():
+    foo = Foo()
+    assert isinstance(foo, RichRenderable)
+    assert isinstance(Text("hello"), RichRenderable)
+    assert isinstance(Panel("hello"), RichRenderable)
+    assert not isinstance(foo, str)
+    assert not isinstance("foo", RichRenderable)
+    assert not isinstance([], RichRenderable)