use test terminal backend for integration tests

helix-term/src/application.rs

@@ -216,21 +216,15 @@ impl Application {
     }
 
     fn render(&mut self) {
-        #[cfg(feature = "integration")]
-        return;
-
-        #[allow(unreachable_code)]
-        {
-            let compositor = &mut self.compositor;
+        let compositor = &mut self.compositor;
 
-            let mut cx = crate::compositor::Context {
-                editor: &mut self.editor,
-                jobs: &mut self.jobs,
-                scroll: None,
-            };
+        let mut cx = crate::compositor::Context {
+            editor: &mut self.editor,
+            jobs: &mut self.jobs,
+            scroll: None,
+        };
 
-            compositor.render(&mut cx);
-        }
+        compositor.render(&mut cx);
     }
 
     pub async fn event_loop<S>(&mut self, input_stream: &mut S)

helix-term/src/commands.rs

@@ -2100,10 +2100,10 @@ fn insert_mode(cx: &mut Context) {
         doc.text().to_string()
     );
 
-    let selection = doc.selection(view.id).clone().transform(|range| {
-        let new_range = Range::new(range.to(), range.from());
-        new_range
-    });
+    let selection = doc
+        .selection(view.id)
+        .clone()
+        .transform(|range| Range::new(range.to(), range.from()));
 
     doc.set_selection(view.id, selection);
 }

helix-term/src/compositor.rs

@@ -5,6 +5,9 @@ use helix_core::Position;
 use helix_view::graphics::{CursorKind, Rect};
 
 use crossterm::event::Event;
+
+#[cfg(feature = "integration")]
+use tui::backend::TestBackend;
 use tui::buffer::Buffer as Surface;
 
 pub type Callback = Box<dyn FnOnce(&mut Compositor, &mut Context)>;
@@ -64,10 +67,20 @@ pub trait Component: Any + AnyComponent {
 }
 
 use anyhow::Context as AnyhowContext;
+use tui::backend::Backend;
+
+#[cfg(not(feature = "integration"))]
+use tui::backend::CrosstermBackend;
+
+#[cfg(not(feature = "integration"))]
 use std::io::stdout;
-use tui::backend::{Backend, CrosstermBackend};
+
+#[cfg(not(feature = "integration"))]
 type Terminal = tui::terminal::Terminal<CrosstermBackend<std::io::Stdout>>;
 
+#[cfg(feature = "integration")]
+type Terminal = tui::terminal::Terminal<TestBackend>;
+
 pub struct Compositor {
     layers: Vec<Box<dyn Component>>,
     terminal: Terminal,
@@ -77,7 +90,12 @@ pub struct Compositor {
 
 impl Compositor {
     pub fn new() -> anyhow::Result<Self> {
+        #[cfg(not(feature = "integration"))]
         let backend = CrosstermBackend::new(stdout());
+
+        #[cfg(feature = "integration")]
+        let backend = TestBackend::new(120, 150);
+
         let terminal = Terminal::new(backend).context("build terminal")?;
         Ok(Self {
             layers: Vec::new(),