A test: a malformed address is bad address syntax, EINVAL, on a terminal as on a text

Round 20 reported a malformed address on a terminal answering otherwise;
it answers `bad address syntax` here, as on a text pane, and this holds it.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index cf2068bc..c0695c76 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -2046,6 +2046,21 @@ test "a tag write refuses NUL and the other control characters" {
     }
 }
 
+test "a malformed address is bad address syntax, on a terminal as on a text" {
+    const p = try th.withTerm(testing.allocator);
+    defer p.deinit();
+    const t = try withFile(testing.allocator, "one\n");
+    defer t.deinit();
+    for ([_]*pardes.Pardes{ p, t }) |q| {
+        for ([_][]const u8{ "1x", "/(/", ",,x" }) |expr| {
+            const refused = wr(q, Node.of(serialOf(q), .addr), expr);
+            try testing.expectEqual(E.INVAL, refused.errno());
+            try testing.expect(refused.reply.ename.len > 0);
+        }
+        try testing.expectEqualStrings("bad address syntax", wr(q, Node.of(serialOf(q), .addr), "1x").reply.ename);
+    }
+}
+
 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();