new_contents: """
  Test some more expression commands.
  """
  
  import os
  import unittest2
  import lldb
  import lldbutil
  from lldbtest import *
  
  class ExprCommands2TestCase(TestBase):
  
      mydir = os.path.join("expression_command", "test")
  
      def setUp(self):
          # Call super's setUp().
          TestBase.setUp(self)
          # Find the line number to break for main.c.
          self.line = line_number('main.cpp',
                                  '// Please test many expressions while stopped at this line:')
  
      def test_more_expr_commands(self):
          """Test some more expression commands."""
          self.buildDefault()
  
          self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
  
          self.expect("breakpoint set -f main.cpp -l %d" % self.line,
                      BREAKPOINT_CREATED,
              startstr = "Breakpoint created: 1: file ='main.cpp', line = %d" %
                          self.line)
  
          self.runCmd("run", RUN_SUCCEEDED)
  
          # Does static casting work?
          self.expect("expression (int*)argv",
              startstr = "(int *) $0 = 0x")
          # (int *) $0 = 0x00007fff5fbff258
  
          # Do anonymous symbols work?
          self.expect("expression ((char**)environ)[0]",
              startstr = "(char *) $1 = 0x")
          # (char *) $1 = 0x00007fff5fbff298 "Apple_PubSub_Socket_Render=/tmp/launch-7AEsUD/Render"
  
          # Do return values containing the contents of expression locals work?
          self.expect("expression int i = 5; i",
              startstr = "(int) $2 = 5")
          # (int) $2 = 5
          self.expect("expression $2 + 1",
              startstr = "(int) $3 = 6")
          # (int) $3 = 6
  
          # Do return values containing the results of static expressions work?
          self.expect("expression 20 + 3",
              startstr = "(int) $4 = 23")
          # (int) $4 = 5
          self.expect("expression $4 + 1",
              startstr = "(int) $5 = 24")
          # (int) $5 = 6
  
  
  if __name__ == '__main__':
      import atexit
      lldb.SBDebugger.Initialize()
      atexit.register(lambda: lldb.SBDebugger.Terminate())
      unittest2.main()
  
subject: Add TestExprs2.py for recent check-ins related to the 'expression' subsystem.