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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
10class TestCase(PExpectTest):
11
12    mydir = TestBase.compute_mydir(__file__)
13
14    arrow_up = "\033[A"
15    arrow_down = "\033[B"
16
17    # PExpect uses many timeouts internally and doesn't play well
18    # under ASAN on a loaded machine..
19    @skipIfAsan
20    @skipIfEditlineSupportMissing
21    @expectedFailureAll(oslist=['freebsd'], bugnumber='llvm.org/pr48316')
22    def test_nav_arrow_up(self):
23        """Tests that we can navigate back to the previous line with the up arrow"""
24        self.launch()
25
26        # Start multiline expression mode by just running 'expr'
27        self.child.sendline("expr")
28        self.child.expect_exact("terminate with an empty line to evaluate")
29        # Create a simple integer expression '123' and press enter.
30        self.child.send("123\n")
31        # We should see the prompt for the second line of our expression.
32        self.child.expect_exact("2: ")
33        # Go back to the first line and change 123 to 124.
34        # Then press enter twice to evaluate our expression.
35        self.child.send(self.arrow_up + "\b4\n\n")
36        # The result of our expression should be 124 (our edited expression)
37        # and not 123 (the one we initially typed).
38        self.child.expect_exact("(int) $0 = 124")
39
40        self.quit()
41
42    @skipIfAsan
43    @skipIfEditlineSupportMissing
44    @expectedFailureAll(oslist=['freebsd'], bugnumber='llvm.org/pr48316')
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