sdl: main tweaks + tests

1 files changed, 18 insertions, 0 deletions

diff --git a/tests.zig b/tests.zig
index 0a81feb6..e0d982bd 100644
--- a/tests.zig
+++ b/tests.zig
@@ -611,4 +611,22 @@ pub fn main(init: std.process.Init) !void {
         try hs8.send("stty -icanon -echo min 1 time 0; printf '\\033[6n'; read -r -d R -t 3 _c && printf 'ZZCPR''OK\\n'; stty sane\r");
         try hs8.expectWaitFor("ZZCPROK", 8000, "app blocked on its ESC[6n query — pardes dropped the reply (device queries not answered)");
     }
+
+    // 19. PRIMARY-DA TERMINATOR (helix regression). crossterm probes capabilities with
+    //     `ESC[?u ESC[c` (kitty-keyboard query + primary DA) and waits on the DA reply
+    //     `ESC[?...c` as the TERMINATOR of the whole probe. Answering ESC[6n alone (test
+    //     18) is not enough: without primary DA, helix enters its alt screen and then
+    //     hangs on a BLANK pane. Send the real probe, read until the DA reply's 'c',
+    //     and print the split marker only on success.
+    {
+        var hs9 = try Harness.init(gpa, exe.ptr, 24, 80);
+        defer hs9.deinit();
+        try hs9.expectWaitFor("build.zig", 8000, "fresh terminal never auto-ls'd");
+        try hs9.send("\x02"); // normal -> tty
+        try hs9.pump(600);
+        // read until 'c' (primary DA ends in 'c'); the kitty reply ESC[?0u has no 'c',
+        // so the read only completes once primary DA is answered.
+        try hs9.send("stty -icanon -echo min 1 time 0; printf '\\033[?u\\033[c'; read -r -d c -t 3 _r && printf 'ZZDA''OK\\n'; stty sane\r");
+        try hs9.expectWaitFor("ZZDAOK", 8000, "app blocked on its ESC[c device-attributes probe — pardes never answered primary DA (helix hangs on a blank pane)");
+    }
 }