test: add insta tests for OutputWidget highlighting and navigation

Author: tlipinski

src/output_widget.rs

@@ -569,6 +569,56 @@ mod tests {
         assert_snapshot!("scroll up page", terminal.backend());
     }
 
+    #[test]
+    fn highlighting() {
+        let mut terminal = Terminal::new(TestBackend::new(20, 10)).unwrap();
+
+        let mut widget = OutputWidget::default();
+
+        widget.handle_command_output(Output::ok_stdin(&generate_lines(50)));
+        terminal
+            .draw(|frame| widget.render(frame.area(), frame.buffer_mut()))
+            .unwrap();
+        assert_snapshot!("highlight base", terminal.backend());
+
+        widget.highlight("line2", false);
+        terminal
+            .draw(|frame| widget.render(frame.area(), frame.buffer_mut()))
+            .unwrap();
+        assert_snapshot!("highlight", terminal.backend());
+
+        widget.highlight_next();
+        widget.highlight_next();
+        widget.highlight_next();
+        widget.highlight_next();
+        terminal
+            .draw(|frame| widget.render(frame.area(), frame.buffer_mut()))
+            .unwrap();
+        assert_snapshot!("highlight next 4x", terminal.backend());
+
+        // in visible area - should not move offset
+        widget.highlight_next();
+        terminal
+            .draw(|frame| widget.render(frame.area(), frame.buffer_mut()))
+            .unwrap();
+        assert_snapshot!("highlight next 1x", terminal.backend());
+
+        widget.highlight_prev();
+        widget.highlight_prev();
+        widget.highlight_prev();
+        widget.highlight_prev();
+        terminal
+            .draw(|frame| widget.render(frame.area(), frame.buffer_mut()))
+            .unwrap();
+        assert_snapshot!("highlight prev 4x", terminal.backend());
+
+        widget.highlight("line50", false);
+        terminal
+            .draw(|frame| widget.render(frame.area(), frame.buffer_mut()))
+            .unwrap();
+        assert_snapshot!("highlight another highlight", terminal.backend());
+    }
+
     #[test]
     fn split_line_into_parts_by_ranges_test() {
         let str = "01234567890123456789";

src/snapshots/rura__output_widget__tests__highlight another highlight.snap

@@ -0,0 +1,14 @@
+---
+source: src/output_widget.rs
+expression: terminal.backend()
+---
+"45 line45          ▲"
+"46 line46          ║"
+"47 line47          ║"
+"48 line48          ║"
+"49 line49          ║"
+"50 line50          ║"
+"                   ║"
+"                   █"
+"                   █"
+"                   ▼"

src/snapshots/rura__output_widget__tests__highlight base.snap

@@ -0,0 +1,14 @@
+---
+source: src/output_widget.rs
+expression: terminal.backend()
+---
+" 1 line1           ▲"
+" 2 line2           █"
+" 3 line3           █"
+" 4 line4           ║"
+" 5 line5           ║"
+" 6 line6           ║"
+" 7 line7           ║"
+" 8 line8           ║"
+" 9 line9           ║"
+"10 line10          ▼"

src/snapshots/rura__output_widget__tests__highlight next 1x.snap

@@ -0,0 +1,14 @@
+---
+source: src/output_widget.rs
+expression: terminal.backend()
+---
+"18 line18          ▲"
+"19 line19          ║"
+"20 line20          ║"
+"21 line21          ║"
+"22 line22          █"
+"23 line23          ║"
+"24 line24          ║"
+"25 line25          ║"
+"26 line26          ║"
+"27 line27          ▼"

src/snapshots/rura__output_widget__tests__highlight next 4x.snap

@@ -0,0 +1,14 @@
+---
+source: src/output_widget.rs
+expression: terminal.backend()
+---
+"18 line18          ▲"
+"19 line19          ║"
+"20 line20          ║"
+"21 line21          ║"
+"22 line22          █"
+"23 line23          ║"
+"24 line24          ║"
+"25 line25          ║"
+"26 line26          ║"
+"27 line27          ▼"

src/snapshots/rura__output_widget__tests__highlight prev 4x.snap

@@ -0,0 +1,14 @@
+---
+source: src/output_widget.rs
+expression: terminal.backend()
+---
+"18 line18          ▲"
+"19 line19          ║"
+"20 line20          ║"
+"21 line21          ║"
+"22 line22          █"
+"23 line23          ║"
+"24 line24          ║"
+"25 line25          ║"
+"26 line26          ║"
+"27 line27          ▼"

src/snapshots/rura__output_widget__tests__highlight.snap

@@ -0,0 +1,14 @@
+---
+source: src/output_widget.rs
+expression: terminal.backend()
+---
+" 1 line1           ▲"
+" 2 line2           █"
+" 3 line3           █"
+" 4 line4           ║"
+" 5 line5           ║"
+" 6 line6           ║"
+" 7 line7           ║"
+" 8 line8           ║"
+" 9 line9           ║"
+"10 line10          ▼"