import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil

class TestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    def test(self):
        self.build()
        lldbutil.run_to_source_breakpoint(self, "// break here", lldb.SBFileSpec("main.c"))

        self.expect("statistics disable", substrs=['need to enable statistics before disabling'], error=True)

        # 'expression' should change the statistics.
        self.expect("statistics enable")
        self.expect("statistics enable", substrs=['already enabled'], error=True)
        self.expect("expr patatino", substrs=['27'])
        self.expect("statistics disable")
        self.expect("statistics dump", substrs=['expr evaluation successes : 1',
                                                'expr evaluation failures : 0'])

        # 'frame var' with disabled statistics shouldn't change stats.
        self.expect("frame var", substrs=['27'])

        self.expect("statistics enable")
        # 'frame var' with enabled statistics will change stats.
        self.expect("frame var", substrs=['27'])
        self.expect("statistics disable")
        self.expect("statistics dump", substrs=['frame var successes : 1',
                                                'frame var failures : 0'])