lldb/test/API/commands/expression/multiline-completion/TestMultilineCompletion.py

   1 """
   2 Test completion for multiline expressions.
   3 """
   4
   5 import lldb
   6 from lldbsuite.test.decorators import *
   7 from lldbsuite.test.lldbtest import *
   8 from lldbsuite.test.lldbpexpect import PExpectTest
   9
  10
  11 class MultilineCompletionTest(PExpectTest):
  12     def start_expression_editor(self):
  13         """Starts the multiline expression editor."""
  14         self.child.send("expression\n")
  15         self.child.expect_exact("terminate with an empty line to evaluate")
  16
  17     def exit_expression_editor(self):
  18         """Exits the multiline expression editor."""
  19         # Send a newline to finish the current line. The second newline will
  20         # finish the new empty line which will exit the editor. The space at the
  21         # start prevents that the first newline already exits the editor (in
  22         # case the current line of the editor is already empty when this
  23         # function is called).
  24         self.child.send(" \n\n")
  25         self.expect_prompt()
  26
  27     # PExpect uses many timeouts internally and doesn't play well
  28     # under ASAN on a loaded machine..
  29     @skipIfAsan
  30     @skipIfEditlineSupportMissing
  31     @expectedFailureAll(oslist=["freebsd"], bugnumber="llvm.org/pr49408")
  32     @skipIf(oslist=["linux"], archs=["arm", "aarch64"])
  33     def test_basic_completion(self):
  34         """Test that we can complete a simple multiline expression"""
  35         self.build()
  36
  37         self.launch(executable=self.getBuildArtifact("a.out"), dimensions=(100, 500))
  38         self.expect("b main", substrs=["Breakpoint 1", "address ="])
  39         self.expect("run", substrs=["stop reason = breakpoint 1"])
  40
  41         self.start_expression_editor()
  42         self.child.send("to_\t")
  43         # editline might move the cursor back to the start of the line via \r
  44         # and then back to its original position.
  45         self.child.expect(
  46             re.compile(
  47                 b"to_(\r"
  48                 + self.cursor_forward_escape_seq(len("  1: to_"))
  49                 + b")?complete"
  50             )
  51         )
  52         self.exit_expression_editor()
  53
  54         # Check that completion empty input in a function with only one
  55         # local variable works.
  56         self.expect(
  57             "breakpoint set -p 'break in single_local_func'", substrs=["Breakpoint 2"]
  58         )
  59         self.expect("continue", substrs=["stop reason = breakpoint 2"])
  60         self.start_expression_editor()
  61         self.child.send("\t")
  62         # Only one local, so this will directly insert 'only_local' with a
  63         # trailing space to signal a final completion.
  64         self.child.expect_exact("only_local ")
  65         self.exit_expression_editor()
  66
  67         self.quit()