1""" 2Tests navigating in the multiline expression editor. 3""" 4 5import lldb 6from lldbsuite.test.decorators import * 7from lldbsuite.test.lldbtest import * 8from lldbsuite.test.lldbpexpect import PExpectTest 9 10 11class TestCase(PExpectTest): 12 arrow_up = "\033[A" 13 arrow_down = "\033[B" 14 15 # PExpect uses many timeouts internally and doesn't play well 16 # under ASAN on a loaded machine.. 17 @skipIfAsan 18 @skipIfEditlineSupportMissing 19 @expectedFailureAll(oslist=["freebsd"], bugnumber="llvm.org/pr48316") 20 @skipIf(oslist=["linux"], archs=["arm", "aarch64"]) # Randomly fails on buildbot 21 def test_nav_arrow_up(self): 22 """Tests that we can navigate back to the previous line with the up arrow""" 23 self.launch() 24 25 # Start multiline expression mode by just running 'expr' 26 self.child.sendline("expr") 27 self.child.expect_exact("terminate with an empty line to evaluate") 28 # Create a simple integer expression '123' and press enter. 29 self.child.send("123\n") 30 # We should see the prompt for the second line of our expression. 31 self.child.expect_exact("2: ") 32 # Go back to the first line and change 123 to 124. 33 # Then press enter twice to evaluate our expression. 34 self.child.send(self.arrow_up + "\b4\n\n") 35 # The result of our expression should be 124 (our edited expression) 36 # and not 123 (the one we initially typed). 37 self.child.expect_exact("(int) $0 = 124") 38 39 self.quit() 40 41 @skipIfAsan 42 @skipIfEditlineSupportMissing 43 @expectedFailureAll(oslist=["freebsd"], bugnumber="llvm.org/pr48316") 44 @skipIf(oslist=["linux"], archs=["arm", "aarch64"]) # Randomly fails on buildbot 45 def test_nav_arrow_down(self): 46 """Tests that we can navigate to the next line with the down arrow""" 47 self.launch() 48 49 # Start multiline expression mode by just running 'expr' 50 self.child.sendline("expr") 51 self.child.expect_exact("terminate with an empty line to evaluate") 52 # Create a simple integer expression '111' and press enter. 53 self.child.send("111\n") 54 # We should see the prompt for the second line of our expression. 55 self.child.expect_exact("2: ") 56 # Create another simple integer expression '222'. 57 self.child.send("222") 58 # Go back to the first line and change '111' to '111+' to make 59 # an addition operation that spans two lines. We need to go up to 60 # test that we can go back down again. 61 self.child.send(self.arrow_up + "+") 62 # Go back down to our second line and change '222' to '223' 63 # so that the full expression is now '111+\n223'. 64 # Then press enter twice to evaluate the expression. 65 self.child.send(self.arrow_down + "\b3\n\n") 66 # The result of our expression '111 + 223' should be '334'. 67 # If the expression is '333' then arrow down failed to get 68 # us back to the second line. 69 self.child.expect_exact("(int) $0 = 334") 70 71 self.quit() 72 73 @skipIfAsan 74 @skipIfEditlineSupportMissing 75 @skipIf(oslist=["linux"], archs=["arm", "aarch64"]) # Randomly fails on buildbot 76 def test_nav_arrow_up_empty(self): 77 """ 78 Tests that navigating with the up arrow doesn't crash and skips 79 empty history entries. 80 """ 81 self.launch() 82 83 # Create a real history entry '456' and then follow up with an 84 # empty entry (that shouldn't be saved). 85 self.child.sendline("expr") 86 self.child.expect_exact("terminate with an empty line to evaluate") 87 self.child.send("456\n\n") 88 self.expect_prompt() 89 90 self.child.sendline("expr") 91 self.child.expect_exact("terminate with an empty line to evaluate") 92 self.child.send("\n") 93 self.expect_prompt() 94 95 # The up arrow should recall the actual history entry and not the 96 # the empty entry (as that one shouldn't have been saved). 97 self.child.sendline("expr") 98 self.child.expect_exact("terminate with an empty line to evaluate") 99 self.child.send(self.arrow_up) 100 self.child.expect_exact("456") 101 self.child.send("\n\n") 102 self.expect_prompt() 103 104 self.quit() 105