1 files changed, 37 insertions, 0 deletions
diff --git a/test/panes.zig b/test/panes.zig
index 8e71e69d..2d3aed43 100644
--- a/test/panes.zig
+++ b/test/panes.zig
@@ -394,6 +394,42 @@ const BodyHitTests = struct {
     }
 };
 
+const LineNumberLookTests = struct {
+    test "right-click on a line number looks at that line, sticky context headers included" {
+        if (!syntax.enabled) return error.SkipZigTest;
+        const p = try Pardes.init(std.testing.allocator, .{ .tty_only = true, .cols = 64, .rows = 18 });
+        defer p.deinit();
+        p.row_metrics = .{ .body_w = 10, .body_h = 20, .tagline_w = 8, .tagline_h = 10 };
+        const pane = try TreeContextTests.setZigFile(p, "const Box = struct {\n    pub fn work(\n        value: usize,\n    ) void {\n" ++ "        // body\n" ** 60 ++ "    }\n};\n");
+        try std.testing.expect(p.executeBuiltinLine(0, "TreeContext"));
+        pane.scrollBy(30);
+        var frame = std.heap.ArenaAllocator.init(p.gpa);
+        defer frame.deinit();
+        _ = try p.render(frame.allocator());
+        const layer = &p.surface.body_layers[0];
+        try std.testing.expect(layer.context_rows >= 2);
+        // A header row's number is its declaration's own source line, not the
+        // body line it sits over (`pub fn work(` is line 1); a body row's is
+        // its own.
+        try std.testing.expectEqual(@as(i32, 1), pane.wrapAt(1).line);
+        const rows = [_]u16{ 1, pane.context_rows + 3 };
+        for (rows) |row| {
+            // Each Look recentres the view; come back under the headers.
+            pane.scrollBy(30 - pane.scroll());
+            _ = frame.reset(.retain_capacity);
+            _ = try p.render(frame.allocator());
+            const expected = pane.wrapAt(row).line;
+            var press = BodyHitTests.mouse(&p.surface.body_layers[0], row, 1, .press);
+            press.button = .right;
+            var release = BodyHitTests.mouse(&p.surface.body_layers[0], row, 1, .release);
+            release.button = .right;
+            p.update(.{ .mouse = press });
+            p.update(.{ .mouse = release });
+            try std.testing.expectEqual(expected, pane.cur_row);
+        }
+    }
+};
+
 const TreeContextTests = struct {
     const source = "const Box = struct {\n" ++
         "    pub fn work(\n" ++
@@ -4069,6 +4105,7 @@ test {
     _ = TagNameTintTests;
     _ = TreeContextTests;
     _ = BodyHitTests;
+    _ = LineNumberLookTests;
     _ = TtySelectionTests;
     _ = ClickCursorTests;
     _ = JumpSelectionTests;