System.Data.SQLite

        #       contains a package index file?
        #
        if {[file exists [file join $dir Tests]] && \
            [file isdirectory [file join $dir Tests]] && \
            [file exists [file join $dir Tests pkgIndex.eagle]] && \
            [file isfile [file join $dir Tests pkgIndex.eagle]]} then {
          #
          # NOTE: If requested, give the caller access to the name of the
          # NOTE: If requested, give our caller access to the name of the
          #       directory we just found.
          #
          if {[string length $varName] > 0} then {
            upvar 1 $varName dir2
          }

          #

    #
    # NOTE: This variable will contain the name of the directory containing the
    #       vendor-specific testing infrastructure.  If the variable does not
    #       already exist, create it; otherwise, it has been overridden and the
    #       existing value should be left intact.
    #
    set have_vendor_directory [info exists ::vendor_directory]
    set have_vendor_directory [info exists vendor_directory]

    if {!$have_vendor_directory} then {
      set ::vendor_directory ""
      set vendor_directory ""
    }

    #
    # NOTE: This procedure will attempt to find the vendor-specific testing
    #       infrastructure directory and add it to the auto-path for the
    #       current interpreter.  Normally, this will also set the variable
    #       created above to point to the directory added to the auto-path;
    #       however, this will not be done if the variable was not created
    #       by us.
    #
    addTestSuiteToAutoPath stdout [expr {$have_vendor_directory ? "" : \
        "::vendor_directory"}] false
        "vendor_directory"}] false

    unset have_vendor_directory

    #
    # NOTE: If we actually found a vendor-specific testing infrastructure
    #       directory then modify the TestPath property of the current
    #       interpreter to point directly to it.
    #
    if {[string length $::vendor_directory] > 0} then {
      setupInterpreterTestPath stdout $::vendor_directory false
    if {[string length $vendor_directory] > 0} then {
      setupInterpreterTestPath stdout $vendor_directory false
    }
  }
}

###############################################################################
############################### END VENDOR CODE ###############################
###############################################################################

      #
      if {[info exists ::test_overrides] && \
          [llength $::test_overrides] > 0} then {
        eval lappend varNames $::test_overrides
      }

      #
      # NOTE: If requested by the caller, add any additional variable
      # NOTE: If requested by our caller, add any additional variable
      #       names to copy now.
      #
      if {[llength $extraVarNames] > 0} then {
        eval lappend varNames $extraVarNames
      }

      #

      }

      return $result
    }

    proc getAppDomainPreamble { {prefix ""} {suffix ""} } {
      #
      # NOTE: This procedure returns a test setup script suitable for evaluation
      #       by a test interpreter created in an isolated application domain.
      #       The script being returned will be surrounded by the prefix and
      #       suffix "script fragments" specified by our caller, if any.  The
      #       entire script being returned will be substituted via [subst], in
      #       the context of our caller.  This step is necessary so that some
      #       limited context information, primarily related to the test build
      #       directory, can be transferred to the interpreter in the isolated
      #       application domain, making it able to successfully run tests that
      #       require one or more of the files in the build directory.  Callers
      #       to this procedure should keep in mind that the test script being
      #       returned cannot rely on any script library procedures not defined
      #       by the Eagle.Library package (i.e. "init.eagle").  Also, all
      #       variable references and all "nested" commands (i.e. those in
      #       square brackets), unless they are specially quoted, will end up
      #       being evaluated in the context of the calling interpreter and not
      #       the test interpreter created in the isolated application domain.
      # NOTE: This procedure returns a test setup script fragment suitable for
      #       evaluation by an interpreter created in an isolated application
      #       domain.  The script fragment being returned will be surrounded by
      #       the prefix and suffix "script fragments" specified by our caller,
      #       if any.  The entire script being returned will be substituted via
      #       [subst], in the context of our caller, before being returned.
      #       This step is necessary so that some limited context information,
      #       primarily related to the testing directories, can be transferred
      #       to the interpreter in the isolated application domain, making it
      #       able to successfully run tests that require one or more of the
      #       files in one of the testing directories.  Callers should keep in
      #       mind that the test script fragment being returned cannot rely on
      #       any script library procedures that are not provided by the Eagle
      #       library package (i.e. "init.eagle"), including those provided by
      #       the Eagle test package, unless the file containing them is loaded
      #       manually via some other mechanism (e.g. by including appropriate
      #       [package require] or [source] commands in the prefix or suffix
      #       script fragments).  Also, all variable references and all nested
      #       commands (i.e. those in square brackets) contained in the final
      #       script fragment will end up being evaluated in the context of the
      #       calling interpreter and not the target interpreter created in the
      #       isolated application domain unless the dollar signs and/or square
      #       brackets are specially quoted with backslashes.
      #
      return [uplevel 1 [list subst [appendArgs $prefix {
        if {[hasRuntimeOption native]} then {
          object invoke Interpreter.GetActive AddRuntimeOption native
        }
      } [getTestOverridesPreamble [list path test_channel]] $suffix]]]
    }

      # NOTE: Open the database connection now, placing the opaque handle value
      #       into the variable specified by our caller.
      #
      set db [sql open -type SQLite [subst $connection]]

      #
      # NOTE: Configure the temporary directory for the newly opened database
      #       connection now unless the caller forbids it.
      #       connection now unless our caller forbids it.
      #
      if {$temporary} then {
        sql execute $db [appendArgs \
            "PRAGMA temp_store_directory = \"" [getTemporaryDirectory] "\";"]
      }

      #