nested + pardes: snapshot updates and small behavior fixes across panes

1 files changed, 9 insertions, 0 deletions

diff --git a/test/e2e_harness.zig b/test/e2e_harness.zig
index 4767871f..6f2f5ef1 100644
--- a/test/e2e_harness.zig
+++ b/test/e2e_harness.zig
@@ -14,6 +14,7 @@ extern "c" fn forkpty(
 ) c_int;
 extern "c" fn execvp(file: [*:0]const u8, argv: [*:null]const ?[*:0]const u8) c_int;
 extern "c" fn _exit(status: c_int) noreturn;
+extern "c" fn setenv(name: [*:0]const u8, value: [*:0]const u8, overwrite: c_int) c_int;
 
 /// Monotonic milliseconds; the harness's only clock (std.time lost
 /// milliTimestamp in 0.16).
@@ -87,6 +88,14 @@ pub const Harness = struct {
         argv[0] = exe;
         for (args, 0..) |a, i| argv[i + 1] = a;
 
+        // The app under test is a fresh outer session even when this harness
+        // itself is running in a pardes pane. Unlike --nested, the boundary
+        // still lets pane shells below that app detect and talk to it, which
+        // nested.snap exercises directly.
+        var boundary_buf: [32:0]u8 = undefined;
+        const boundary = try std.fmt.bufPrintSentinel(&boundary_buf, "{d}", .{@as(u32, @intCast(libc.getpid()))}, 0);
+        if (setenv("PARDES_NESTED_BOUNDARY_PID", boundary, 1) != 0) return error.SetEnvFailed;
+
         var master: c_int = undefined;
         const ws = posix.winsize{ .row = rows, .col = cols, .xpixel = 0, .ypixel = 0 };
         const pid = forkpty(&master, null, null, &ws);