Add test_live_render

Basic test for object LiveRender

tests/test_live_render.py

@@ -0,0 +1,43 @@
+import pytest
+from rich.live_render import LiveRender
+from rich.console import Console, ConsoleOptions
+from rich.style import Style
+from rich.segment import Segment
+
+
+@pytest.fixture
+def live_render():
+    return LiveRender(renderable="my string")
+
+
+def test_renderable(live_render):
+    assert live_render.renderable == "my string"
+    live_render.set_renderable("another string")
+    assert live_render.renderable == "another string"
+
+
+def test_position_cursor(live_render):
+    assert str(live_render.position_cursor()) == ""
+    live_render._shape = (80, 2)
+    assert str(live_render.position_cursor()) == "\r\x1b[2K\x1b[1A\x1b[2K"
+
+
+def test_restore_cursor(live_render):
+    assert str(live_render.restore_cursor()) == ""
+    live_render._shape = (80, 2)
+    assert str(live_render.restore_cursor()) == "\r\x1b[1A\x1b[2K\x1b[1A\x1b[2K"
+
+
+def test_rich_console(live_render):
+    options = ConsoleOptions(
+        legacy_windows=False,
+        min_width=10,
+        max_width=20,
+        is_terminal=False,
+        encoding="utf-8",
+    )
+    rich_console = live_render.__rich_console__(Console(), options)
+    assert [Segment("my string", Style.parse("none"))] == list(rich_console)
+    live_render.style = "red"
+    rich_console = live_render.__rich_console__(Console(), options)
+    assert [Segment("my string", Style.parse("red"))] == list(rich_console)