Handle changes in Textual 0.48

src/memray/reporters/tree.css

@@ -0,0 +1,29 @@
+Label {
+  padding: 1 3;
+}
+
+#frame-detail-grid Label {
+  color: $text;
+  height: auto;
+  width: 100%;
+  background: $panel-lighten-1;
+}
+
+#frame-detail-grid {
+  grid-size: 1 2;
+  grid-gutter: 1 2;
+  padding: 0 1;
+  border: thick $background 80%;
+  background: $surface;
+}
+
+#detailcol {
+  width: 40%;
+  max-width: 100;
+}
+
+TextArea {
+  scrollbar-size-vertical: 0;
+  border: none;
+  padding: 0;
+}

src/memray/reporters/tree.py

@@ -181,6 +181,7 @@ def compose(self) -> ComposeResult:
         text.show_line_numbers = False
         text.can_focus = False
         text.cursor_blink = False
+        text.soft_wrap = False
 
         labels: list[Label] = []
         content_by_label_id = self._get_content_by_label_id()
@@ -230,35 +231,7 @@ class TreeApp(App[None]):
         ),
     ]
 
-    DEFAULT_CSS = """
-        Label {
-            padding: 1 3;
-        }
-
-        #frame-detail-grid Label {
-            color: $text;
-            height: auto;
-            width: 100%;
-            background: $panel-lighten-1;
-        }
-
-        #frame-detail-grid {
-            grid-size: 1 2;
-            grid-gutter: 1 2;
-            padding: 0 1;
-            border: thick $background 80%;
-            background: $surface;
-        }
-
-        #detailcol {
-            width: 40%;
-            max-width: 100;
-        }
-
-        TextArea {
-            scrollbar-size-vertical: 0;
-        }
-    """
+    CSS_PATH = "tree.css"
 
     def __init__(
         self,

tests/conftest.py

@@ -1,4 +1,5 @@
 import socket
+import sys
 
 import pytest
 
@@ -10,3 +11,12 @@ def free_port():
     port_number = s.getsockname()[1]
     s.close()
     return port_number
+
+
+def pytest_configure(config):
+    # Several of the tree reporter tests require Textual 0.48, which does not
+    # support Python 3.7, but skipping those tests causes the test suite to
+    # fail due to unused snapshots. Override the configuration for Python 3.7
+    # so that unused snapshots are a warning, not an error.
+    if sys.version_info < (3, 8):
+        config.option.warn_unused_snapshots = True