1 files changed, 12 insertions, 0 deletions
diff --git a/build.zig b/build.zig
index e9e64056..f6081dad 100644
--- a/build.zig
+++ b/build.zig
@@ -1580,6 +1580,18 @@ pub fn build(b: *std.Build) void {
         run_monkey9p.setCwd(b.path("."));
         run_monkey9p.has_side_effects = true;
         b.step("monkey-9p", "random 9P operations checking the documented rules (-- [--seed N]... [--steps M] [--replay F] [--shrink F] [--no-shrink])").dependOn(&run_monkey9p.step);
+        // The GUI's effects under random input in a hidden test window, each
+        // Motion x Lift x Bloom (test/gui_monkey.py): a gate, not part of
+        // fs-test, since it needs a Wayland display.
+        const monkey_gui_step = b.step("monkey-gui", "random input to hidden GUI test windows across the effect settings (-Dplatform=gui; -- [--seed N] [--steps M])");
+        if (platform == .gui) {
+            const run_monkey_gui = b.addSystemCommand(&.{ "python3", "-B", "test/gui_monkey.py" });
+            run_monkey_gui.addArtifactArg(exe);
+            if (b.args) |args| run_monkey_gui.addArgs(args);
+            run_monkey_gui.setCwd(b.path("."));
+            run_monkey_gui.has_side_effects = true;
+            monkey_gui_step.dependOn(&run_monkey_gui.step);
+        } else monkey_gui_step.dependOn(&b.addFail("monkey-gui needs -Dplatform=gui").step);
         const run_monkey9p_smoke = b.addSystemCommand(&.{ "python3", "-B", "test/monkey9p.py" });
         run_monkey9p_smoke.addArtifactArg(exe);
         run_monkey9p_smoke.addArg("--smoke");