1 files changed, 14 insertions, 0 deletions
diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index bb562672..16935f41 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -744,6 +744,20 @@ test "a second lock is refused until the holder unlocks or closes, and binds nob
     for (p.fs.opens) |o| try testing.expect(o.node == 0);
 }
 
+test "dirty goes back to 0 when the text is the saved text again" {
+    const p = try withFile(testing.allocator, "one\n");
+    defer p.deinit();
+    const serial = serialOf(p);
+    const dirty = Node.of(serial, .dirty);
+    try testing.expectEqualStrings("0\n", rd(p, dirty, 0, 8).bytes);
+    try testing.expectEqual(Status.ok, wr(p, Node.of(serial, .body), "two\n").reply.status);
+    try testing.expectEqualStrings("1\n", rd(p, dirty, 0, 8).bytes);
+    try testing.expectEqual(Status.ok, wr(p, Node.of(serial, .ctl), "Undo").reply.status);
+    try testing.expectEqualStrings("0\n", rd(p, dirty, 0, 8).bytes);
+    try testing.expectEqual(Status.ok, wr(p, Node.of(serial, .ctl), "Redo").reply.status);
+    try testing.expectEqualStrings("1\n", rd(p, dirty, 0, 8).bytes);
+}
+
 test "a message from a root ctl write is the session's in the log" {
     const p = try withFile(testing.allocator, "x\n");
     defer p.deinit();