test(readarr): snapshot the Readarr context row, loading, and empty states

The stats, downloads, and logo panes of the Readarr context row had no test
exercising them. Add snapshots for the populated, loading, and empty variants
of the context row, plus loading and empty variants of the tab view.

src/ui/readarr_ui/readarr_ui_tests.rs

@@ -20,6 +20,68 @@ mod tests {
     use crate::ui::ui_test_utils::test_utils::{TerminalSize, render_to_string_with_app};
     use rstest::rstest;
 
+    #[test]
+    fn test_readarr_ui_renders_loading() {
+      let mut app = App::test_default();
+      app.is_loading = true;
+      app.push_navigation_stack(ActiveReadarrBlock::Authors.into());
+
+      let output = render_to_string_with_app(TerminalSize::Large, &mut app, |f, app| {
+        ReadarrUi::draw(f, app, f.area());
+      });
+
+      insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_readarr_ui_renders_empty() {
+      let mut app = App::test_default();
+      app.push_navigation_stack(ActiveReadarrBlock::Authors.into());
+
+      let output = render_to_string_with_app(TerminalSize::Large, &mut app, |f, app| {
+        ReadarrUi::draw(f, app, f.area());
+      });
+
+      insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_readarr_ui_renders_context_row() {
+      let mut app = App::test_default_fully_populated();
+      app.push_navigation_stack(ActiveReadarrBlock::Authors.into());
+
+      let output = render_to_string_with_app(TerminalSize::Large, &mut app, |f, app| {
+        ReadarrUi::draw_context_row(f, app, f.area());
+      });
+
+      insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_readarr_ui_renders_context_row_loading() {
+      let mut app = App::test_default();
+      app.is_loading = true;
+      app.push_navigation_stack(ActiveReadarrBlock::Authors.into());
+
+      let output = render_to_string_with_app(TerminalSize::Large, &mut app, |f, app| {
+        ReadarrUi::draw_context_row(f, app, f.area());
+      });
+
+      insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_readarr_ui_renders_context_row_empty() {
+      let mut app = App::test_default();
+      app.push_navigation_stack(ActiveReadarrBlock::Authors.into());
+
+      let output = render_to_string_with_app(TerminalSize::Large, &mut app, |f, app| {
+        ReadarrUi::draw_context_row(f, app, f.area());
+      });
+
+      insta::assert_snapshot!(output);
+    }
+
     #[rstest]
     #[case(ActiveReadarrBlock::Authors, 0)]
     #[case(ActiveReadarrBlock::Downloads, 1)]