[lldb] Make TestIOHandlerCompletion more stable and document it

Instead of relying that three tabs show all completions, we should
show all remaining completions which will always stop the mode
where we show completions. Should fix this test on systems that
somehow have more completions that our normal LLDB (as they
would end up being stuck in the mode where we show completions).

llvm-svn: 369293

1 files changed, 4 insertions, 1 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/iohandler/completion/TestIOHandlerCompletion.py b/lldb/packages/Python/lldbsuite/test/iohandler/completion/TestIOHandlerCompletion.py
index 16ca3a39248..26805bfb07c 100644
--- a/lldb/packages/Python/lldbsuite/test/iohandler/completion/TestIOHandlerCompletion.py
+++ b/lldb/packages/Python/lldbsuite/test/iohandler/completion/TestIOHandlerCompletion.py
@@ -39,13 +39,16 @@ class IOHandlerCompletionTest(TestBase):
             (lldbtest_config.lldbExec, self.lldbOption, "", exe))
 
         self.expect_string(prompt)
-        self.child.send("\t\t\t")
+        # Start tab completion, go to the next page and then display all with 'a'.
+        self.child.send("\t\ta")
         self.expect_string("register")
 
+        # Try tab completing regi to register.
         self.child.send("regi\t")
         self.expect_string(prompt + "register")
         self.child.send("\n")
 
+        # Start tab completion and abort showing more commands with 'n'.
         self.child.send("\t")
         self.expect_string("More (Y/n/a)")
         self.child.send("n")