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"""
Test controlling `expression` result variables are persistent.
"""
import lldb
from lldbsuite.test.lldbtest import *
from lldbsuite.test.decorators import *
from lldbsuite.test import lldbutil
class TestCase(TestBase):
@swiftTest
def test_enable_persistent_result(self):
"""Test explicitly enabling result variables persistence."""
self.build()
lldbutil.run_to_source_breakpoint(
self, "break here", lldb.SBFileSpec("main.swift")
)
self.expect("expression --persistent-result on -- i", startstr="(Int) $R0 = 30")
# Verify the lifetime of $R0 extends beyond the `expression` it was created in.
self.expect("expression $R0", startstr="(Int) $R1 = 30")
@swiftTest
def test_disable_persistent_result(self):
"""Test explicitly disabling persistent result variables."""
self.build()
lldbutil.run_to_source_breakpoint(
self, "break here", lldb.SBFileSpec("main.swift")
)
self.expect("expression --persistent-result off -- i", startstr="(Int) 30")
# Verify a persistent result was not silently created.
self.expect("expression $R0", error=True)
@swiftTest
def test_expression_persists_result(self):
"""Test `expression`'s default behavior is to persist a result variable."""
self.build()
lldbutil.run_to_source_breakpoint(
self, "break here", lldb.SBFileSpec("main.swift")
)
self.expect("expression i", startstr="(Int) $R0 = 30")
self.expect("expression $R0", startstr="(Int) $R1 = 30")
@swiftTest
def test_p_does_not_persist_results(self):
"""Test `p` does not persist a result variable."""
self.build()
lldbutil.run_to_source_breakpoint(
self, "break here", lldb.SBFileSpec("main.swift")
)
self.expect("p i", startstr="(Int) 30")
self.expect("p $R0", error=True)
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