From e87edd79cbb0312ff031c7b1c3d44b6875b4ca28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodrigo=20Gir=C3=A3o=20Serr=C3=A3o?=
 <5621605+rodrigogiraoserrao@users.noreply.github.com>
Date: Tue, 11 Apr 2023 13:29:56 +0100
Subject: [PATCH] Add test for scroll_to_center method.

---
 .../snapshot_apps/scroll_to_center.py         | 40 +++++++++++++++++++
 tests/snapshot_tests/test_snapshots.py        |  4 ++
 2 files changed, 44 insertions(+)
 create mode 100644 tests/snapshot_tests/snapshot_apps/scroll_to_center.py

diff --git a/tests/snapshot_tests/snapshot_apps/scroll_to_center.py b/tests/snapshot_tests/snapshot_apps/scroll_to_center.py
new file mode 100644
index 000000000..fdd616cb6
--- /dev/null
+++ b/tests/snapshot_tests/snapshot_apps/scroll_to_center.py
@@ -0,0 +1,40 @@
+from textual.app import App, ComposeResult
+from textual.containers import HorizontalScroll, VerticalScroll
+from textual.widgets import Label
+
+
+class MyApp(App[None]):
+    CSS = """
+    VerticalScroll, HorizontalScroll {
+        border: round $primary;
+    }
+    #vertical {
+        height: 21;
+    }
+    HorizontalScroll {
+        height: auto;
+    }
+    """
+
+    def compose(self) -> ComposeResult:
+        with VerticalScroll():
+            yield Label(("SPAM\n" * 25)[:-1])
+            with VerticalScroll():
+                yield Label(("SPAM\n" * 53)[:-1])
+                with VerticalScroll(id="vertical"):
+                    yield Label(("SPAM\n" * 78)[:-1])
+                    with HorizontalScroll():
+                        yield Label(("v\n" * 17)[:-1])
+                        yield Label("@" * 302)
+                        yield Label("[red]>>bullseye<<[/red]", id="bullseye")
+                        yield Label("@" * 99)
+                    yield Label(("SPAM\n" * 49)[:-1])
+                yield Label(("SPAM\n" * 51)[:-1])
+            yield Label(("SPAM\n" * 59)[:-1])
+
+    def key_s(self) -> None:
+        self.query_one("#bullseye").scroll_to_center()
+
+
+if __name__ == "__main__":
+    MyApp().run()
diff --git a/tests/snapshot_tests/test_snapshots.py b/tests/snapshot_tests/test_snapshots.py
index 14226a191..6e8767885 100644
--- a/tests/snapshot_tests/test_snapshots.py
+++ b/tests/snapshot_tests/test_snapshots.py
@@ -406,3 +406,7 @@ def test_fr_margins(snap_compare):
 def test_scroll_visible(snap_compare):
     # https://github.com/Textualize/textual/issues/2181
     assert snap_compare(SNAPSHOT_APPS_DIR / "scroll_visible.py", press=["t"])
+
+
+def test_scroll_to_center(snap_compare):
+    assert snap_compare(SNAPSHOT_APPS_DIR / "scroll_to_center.py", press=["s"])