A terminal is typed into only when idle at an empty prompt

A look at a directory, or an exec at a terminal, typed its line after
whatever sat unsent at the prompt and ran the two joined (`echo TYPEDls`).
A terminal with text at its prompt now takes no line; a look at its
directory opens a new terminal, an exec runs as a command pane.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index d1f920a2..95d81e3b 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -1886,6 +1886,32 @@ test "a terminal told the directory it already goes by logs no rename" {
     try testing.expect(th.logHas(p, try std.fmt.bufPrint(&rec, "rename {d} /usr", .{p.panes[term].?.serial})));
 }
 
+test "a terminal with text typed at its prompt is never typed into: a look at its directory opens another" {
+    const p = try th.withTerm(testing.allocator);
+    defer p.deinit();
+    const term = p.paneBySerial(serialOf(p)).?;
+    p.setCwd(term, "/tmp");
+    p.update(.{ .output = .{ .pane = @intCast(term), .bytes = "\x1b]133;A;aid=pardes\x07$ \x1b]133;B;aid=pardes\x07TYPED" } });
+    while (p.nextEffect()) |_| {}
+    var count: usize = 0;
+    for (p.panes) |slot| count += @intFromBool(slot != null);
+    try testing.expectEqual(Status.ok, wr(p, @intFromEnum(tree.TopFile.look), "/tmp\n").reply.status);
+    var typed_into = false;
+    while (p.nextEffect()) |effect| if (effect == .write and effect.write.pane == term) {
+        typed_into = true;
+    };
+    try testing.expect(!typed_into);
+    var after: usize = 0;
+    for (p.panes) |slot| after += @intFromBool(slot != null);
+    try testing.expectEqual(count + 1, after);
+    // An exec at it runs in a pane of its own, not typed after TYPED.
+    _ = wr(p, Node.of(serialOf(p), .exec), "echo hi\n");
+    while (p.nextEffect()) |effect| if (effect == .write and effect.write.pane == term) {
+        typed_into = true;
+    };
+    try testing.expect(!typed_into);
+}
+
 test "size is monotonic: growing is never refused, and a size once taken is taken again" {
     const p = try Pardes.init(testing.allocator, .{ .tty_only = true, .cols = 160, .rows = 60 });
     defer p.deinit();