"""
Tests navigating in the multiline expression editor.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test.lldbpexpect import PExpectTest
class TestCase(PExpectTest):
arrow_up = "\033[A"
arrow_down = "\033[B"
# PExpect uses many timeouts internally and doesn't play well
# under ASAN on a loaded machine..
@skipIfAsan
@skipIfEditlineSupportMissing
@expectedFailureAll(oslist=["freebsd"], bugnumber="llvm.org/pr48316")
@skipIf(oslist=["linux"], archs=["arm", "aarch64"]) # Randomly fails on buildbot
def test_nav_arrow_up(self):
"""Tests that we can navigate back to the previous line with the up arrow"""
self.launch()
# Start multiline expression mode by just running 'expr'
self.child.sendline("expr")
self.child.expect_exact("terminate with an empty line to evaluate")
# Create a simple integer expression '123' and press enter.
self.child.send("123\n")
# We should see the prompt for the second line of our expression.
self.child.expect_exact("2: ")
# Go back to the first line and change 123 to 124.
# Then press enter twice to evaluate our expression.
self.child.send(self.arrow_up + "\b4\n\n")
# The result of our expression should be 124 (our edited expression)
# and not 123 (the one we initially typed).
self.child.expect_exact("(int) $0 = 124")
self.quit()
@skipIfAsan
@skipIfEditlineSupportMissing
@expectedFailureAll(oslist=["freebsd"], bugnumber="llvm.org/pr48316")
@skipIf(oslist=["linux"], archs=["arm", "aarch64"]) # Randomly fails on buildbot
def test_nav_arrow_down(self):
"""Tests that we can navigate to the next line with the down arrow"""
self.launch()
# Start multiline expression mode by just running 'expr'
self.child.sendline("expr")
self.child.expect_exact("terminate with an empty line to evaluate")
# Create a simple integer expression '111' and press enter.
self.child.send("111\n")
# We should see the prompt for the second line of our expression.
self.child.expect_exact("2: ")
# Create another simple integer expression '222'.
self.child.send("222")
# Go back to the first line and change '111' to '111+' to make
# an addition operation that spans two lines. We need to go up to
# test that we can go back down again.
self.child.send(self.arrow_up + "+")
# Go back down to our second line and change '222' to '223'
# so that the full expression is now '111+\n223'.
# Then press enter twice to evaluate the expression.
self.child.send(self.arrow_down + "\b3\n\n")
# The result of our expression '111 + 223' should be '334'.
# If the expression is '333' then arrow down failed to get
# us back to the second line.
self.child.expect_exact("(int) $0 = 334")
self.quit()
@skipIfAsan
@skipIfEditlineSupportMissing
@skipIf(oslist=["linux"], archs=["arm", "aarch64"]) # Randomly fails on buildbot
def test_nav_arrow_up_empty(self):
"""
Tests that navigating with the up arrow doesn't crash and skips
empty history entries.
"""
self.launch()
# Create a real history entry '456' and then follow up with an
# empty entry (that shouldn't be saved).
self.child.sendline("expr")
self.child.expect_exact("terminate with an empty line to evaluate")
self.child.send("456\n\n")
self.expect_prompt()
self.child.sendline("expr")
self.child.expect_exact("terminate with an empty line to evaluate")
self.child.send("\n")
self.expect_prompt()
# The up arrow should recall the actual history entry and not the
# the empty entry (as that one shouldn't have been saved).
self.child.sendline("expr")
self.child.expect_exact("terminate with an empty line to evaluate")
self.child.send(self.arrow_up)
self.child.expect_exact("456")
self.child.send("\n\n")
self.expect_prompt()
self.quit()
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