1 files changed, 30 insertions, 0 deletions
diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index a0a363b5..902a9647 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -1671,6 +1671,36 @@ test "Save and Save path on an image pane are refused with why, never a silent s
     }
 }
 
+test "a builtin for one kind of pane is refused on another, and still acts on its own kind" {
+    const gpa = testing.allocator;
+    const p = try withFile(gpa, "text\n");
+    defer p.deinit();
+    const serial = serialOf(p);
+    const cases = [_]struct { []const u8, []const u8 }{
+        .{ "Petscii\n", "Petscii: only an image pane takes it" },
+        .{ "Palette\n", "Palette: only an image pane takes it" },
+        .{ "Ascii\n", "Ascii: only an image pane takes it" },
+        .{ "Filter\n", "Filter: only a terminal pane takes it" },
+        .{ "Togglettymode\n", "Togglettymode: only a terminal pane takes it" },
+    };
+    for (cases) |case| {
+        const r = wr(p, Node.of(serial, .ctl), case[0]);
+        try testing.expectEqual(Status.err, r.reply.status);
+        try testing.expectEqualStrings(case[1], r.reply.ename);
+    }
+    if (pardes.pdf_enabled) for ([_][]const u8{ "PdfFit\n", "PdfTint\n", "PdfSections\n" }) |line| {
+        try testing.expectEqual(Status.err, wr(p, Node.of(serial, .ctl), line).reply.status);
+    };
+    const id = p.freeSlot().?;
+    const doc = try p.newDocPane(id);
+    doc.image = .{ .path = try p.gpa.dupe(u8, "/tmp/pardes-pic.ppm") };
+    const r = wr(p, Node.of(doc.serial, .ctl), "Mode\n");
+    try testing.expectEqualStrings("Mode: only a text or terminal pane has modes", r.reply.ename);
+    const glyphs = doc.image.?.glyph_art;
+    try testing.expectEqual(Status.ok, wr(p, Node.of(doc.serial, .ctl), "Petscii\n").reply.status);
+    try testing.expect(doc.image.?.glyph_art != glyphs);
+}
+
 test "exec Save writes the named file through the host" {
     const gpa = testing.allocator;
     const p = try withFile(gpa, "one\ntwo\n");