poky/bitbake/lib/bb/tests/data.py

# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# BitBake Tests for the Data Store (data.py/data_smart.py)
#
# Copyright (C) 2010 Chris Larson
# Copyright (C) 2012 Richard Purdie
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#

import unittest
import bb
import bb.data
import bb.parse
import logging

class LogRecord():
    def __enter__(self):
        logs = []
        class LogHandler(logging.Handler):
            def emit(self, record):
                logs.append(record)
        logger = logging.getLogger("BitBake")
        handler = LogHandler()
        self.handler = handler
        logger.addHandler(handler)
        return logs
    def __exit__(self, type, value, traceback):
        logger = logging.getLogger("BitBake")
        logger.removeHandler(self.handler)
        return

def logContains(item, logs):
    for l in logs:
        m = l.getMessage()
        if item in m:
            return True
    return False

class DataExpansions(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d["foo"] = "value_of_foo"
        self.d["bar"] = "value_of_bar"
        self.d["value_of_foo"] = "value_of_'value_of_foo'"

    def test_one_var(self):
        val = self.d.expand("${foo}")
        self.assertEqual(str(val), "value_of_foo")

    def test_indirect_one_var(self):
        val = self.d.expand("${${foo}}")
        self.assertEqual(str(val), "value_of_'value_of_foo'")

    def test_indirect_and_another(self):
        val = self.d.expand("${${foo}} ${bar}")
        self.assertEqual(str(val), "value_of_'value_of_foo' value_of_bar")

    def test_python_snippet(self):
        val = self.d.expand("${@5*12}")
        self.assertEqual(str(val), "60")

    def test_expand_in_python_snippet(self):
        val = self.d.expand("${@'boo ' + '${foo}'}")
        self.assertEqual(str(val), "boo value_of_foo")

    def test_python_snippet_getvar(self):
        val = self.d.expand("${@d.getVar('foo') + ' ${bar}'}")
        self.assertEqual(str(val), "value_of_foo value_of_bar")

    def test_python_unexpanded(self):
        self.d.setVar("bar", "${unsetvar}")
        val = self.d.expand("${@d.getVar('foo') + ' ${bar}'}")
        self.assertEqual(str(val), "${@d.getVar('foo') + ' ${unsetvar}'}")

    def test_python_snippet_syntax_error(self):
        self.d.setVar("FOO", "${@foo = 5}")
        self.assertRaises(bb.data_smart.ExpansionError, self.d.getVar, "FOO", True)

    def test_python_snippet_runtime_error(self):
        self.d.setVar("FOO", "${@int('test')}")
        self.assertRaises(bb.data_smart.ExpansionError, self.d.getVar, "FOO", True)

    def test_python_snippet_error_path(self):
        self.d.setVar("FOO", "foo value ${BAR}")
        self.d.setVar("BAR", "bar value ${@int('test')}")
        self.assertRaises(bb.data_smart.ExpansionError, self.d.getVar, "FOO", True)

    def test_value_containing_value(self):
        val = self.d.expand("${@d.getVar('foo') + ' ${bar}'}")
        self.assertEqual(str(val), "value_of_foo value_of_bar")

    def test_reference_undefined_var(self):
        val = self.d.expand("${undefinedvar} meh")
        self.assertEqual(str(val), "${undefinedvar} meh")

    def test_double_reference(self):
        self.d.setVar("BAR", "bar value")
        self.d.setVar("FOO", "${BAR} foo ${BAR}")
        val = self.d.getVar("FOO")
        self.assertEqual(str(val), "bar value foo bar value")

    def test_direct_recursion(self):
        self.d.setVar("FOO", "${FOO}")
        self.assertRaises(bb.data_smart.ExpansionError, self.d.getVar, "FOO", True)

    def test_indirect_recursion(self):
        self.d.setVar("FOO", "${BAR}")
        self.d.setVar("BAR", "${BAZ}")
        self.d.setVar("BAZ", "${FOO}")
        self.assertRaises(bb.data_smart.ExpansionError, self.d.getVar, "FOO", True)

    def test_recursion_exception(self):
        self.d.setVar("FOO", "${BAR}")
        self.d.setVar("BAR", "${${@'FOO'}}")
        self.assertRaises(bb.data_smart.ExpansionError, self.d.getVar, "FOO", True)

    def test_incomplete_varexp_single_quotes(self):
        self.d.setVar("FOO", "sed -i -e 's:IP{:I${:g' $pc")
        val = self.d.getVar("FOO")
        self.assertEqual(str(val), "sed -i -e 's:IP{:I${:g' $pc")

    def test_nonstring(self):
        self.d.setVar("TEST", 5)
        val = self.d.getVar("TEST")
        self.assertEqual(str(val), "5")

    def test_rename(self):
        self.d.renameVar("foo", "newfoo")
        self.assertEqual(self.d.getVar("newfoo", False), "value_of_foo")
        self.assertEqual(self.d.getVar("foo", False), None)

    def test_deletion(self):
        self.d.delVar("foo")
        self.assertEqual(self.d.getVar("foo", False), None)

    def test_keys(self):
        keys = list(self.d.keys())
        self.assertCountEqual(keys, ['value_of_foo', 'foo', 'bar'])

    def test_keys_deletion(self):
        newd = bb.data.createCopy(self.d)
        newd.delVar("bar")
        keys = list(newd.keys())
        self.assertCountEqual(keys, ['value_of_foo', 'foo'])

class TestNestedExpansions(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d["foo"] = "foo"
        self.d["bar"] = "bar"
        self.d["value_of_foobar"] = "187"

    def test_refs(self):
        val = self.d.expand("${value_of_${foo}${bar}}")
        self.assertEqual(str(val), "187")

    #def test_python_refs(self):
    #    val = self.d.expand("${@${@3}**2 + ${@4}**2}")
    #    self.assertEqual(str(val), "25")

    def test_ref_in_python_ref(self):
        val = self.d.expand("${@'${foo}' + 'bar'}")
        self.assertEqual(str(val), "foobar")

    def test_python_ref_in_ref(self):
        val = self.d.expand("${${@'f'+'o'+'o'}}")
        self.assertEqual(str(val), "foo")

    def test_deep_nesting(self):
        depth = 100
        val = self.d.expand("${" * depth + "foo" + "}" * depth)
        self.assertEqual(str(val), "foo")

    #def test_deep_python_nesting(self):
    #    depth = 50
    #    val = self.d.expand("${@" * depth + "1" + "+1}" * depth)
    #    self.assertEqual(str(val), str(depth + 1))

    def test_mixed(self):
        val = self.d.expand("${value_of_${@('${foo}'+'bar')[0:3]}${${@'BAR'.lower()}}}")
        self.assertEqual(str(val), "187")

    def test_runtime(self):
        val = self.d.expand("${${@'value_of' + '_f'+'o'+'o'+'b'+'a'+'r'}}")
        self.assertEqual(str(val), "187")

class TestMemoize(unittest.TestCase):
    def test_memoized(self):
        d = bb.data.init()
        d.setVar("FOO", "bar")
        self.assertTrue(d.getVar("FOO", False) is d.getVar("FOO", False))

    def test_not_memoized(self):
        d1 = bb.data.init()
        d2 = bb.data.init()
        d1.setVar("FOO", "bar")
        d2.setVar("FOO", "bar2")
        self.assertTrue(d1.getVar("FOO", False) is not d2.getVar("FOO", False))

    def test_changed_after_memoized(self):
        d = bb.data.init()
        d.setVar("foo", "value of foo")
        self.assertEqual(str(d.getVar("foo", False)), "value of foo")
        d.setVar("foo", "second value of foo")
        self.assertEqual(str(d.getVar("foo", False)), "second value of foo")

    def test_same_value(self):
        d = bb.data.init()
        d.setVar("foo", "value of")
        d.setVar("bar", "value of")
        self.assertEqual(d.getVar("foo", False),
                         d.getVar("bar", False))

class TestConcat(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d.setVar("FOO", "foo")
        self.d.setVar("VAL", "val")
        self.d.setVar("BAR", "bar")

    def test_prepend(self):
        self.d.setVar("TEST", "${VAL}")
        self.d.prependVar("TEST", "${FOO}:")
        self.assertEqual(self.d.getVar("TEST"), "foo:val")

    def test_append(self):
        self.d.setVar("TEST", "${VAL}")
        self.d.appendVar("TEST", ":${BAR}")
        self.assertEqual(self.d.getVar("TEST"), "val:bar")

    def test_multiple_append(self):
        self.d.setVar("TEST", "${VAL}")
        self.d.prependVar("TEST", "${FOO}:")
        self.d.appendVar("TEST", ":val2")
        self.d.appendVar("TEST", ":${BAR}")
        self.assertEqual(self.d.getVar("TEST"), "foo:val:val2:bar")

class TestConcatOverride(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d.setVar("FOO", "foo")
        self.d.setVar("VAL", "val")
        self.d.setVar("BAR", "bar")

    def test_prepend(self):
        self.d.setVar("TEST", "${VAL}")
        self.d.setVar("TEST_prepend", "${FOO}:")
        self.assertEqual(self.d.getVar("TEST"), "foo:val")

    def test_append(self):
        self.d.setVar("TEST", "${VAL}")
        self.d.setVar("TEST_append", ":${BAR}")
        self.assertEqual(self.d.getVar("TEST"), "val:bar")

    def test_multiple_append(self):
        self.d.setVar("TEST", "${VAL}")
        self.d.setVar("TEST_prepend", "${FOO}:")
        self.d.setVar("TEST_append", ":val2")
        self.d.setVar("TEST_append", ":${BAR}")
        self.assertEqual(self.d.getVar("TEST"), "foo:val:val2:bar")

    def test_append_unset(self):
        self.d.setVar("TEST_prepend", "${FOO}:")
        self.d.setVar("TEST_append", ":val2")
        self.d.setVar("TEST_append", ":${BAR}")
        self.assertEqual(self.d.getVar("TEST"), "foo::val2:bar")

    def test_remove(self):
        self.d.setVar("TEST", "${VAL} ${BAR}")
        self.d.setVar("TEST_remove", "val")
        self.assertEqual(self.d.getVar("TEST"), "bar")

    def test_remove_cleared(self):
        self.d.setVar("TEST", "${VAL} ${BAR}")
        self.d.setVar("TEST_remove", "val")
        self.d.setVar("TEST", "${VAL} ${BAR}")
        self.assertEqual(self.d.getVar("TEST"), "val bar")

    # Ensure the value is unchanged if we have an inactive remove override
    # (including that whitespace is preserved)
    def test_remove_inactive_override(self):
        self.d.setVar("TEST", "${VAL} ${BAR}    123")
        self.d.setVar("TEST_remove_inactiveoverride", "val")
        self.assertEqual(self.d.getVar("TEST"), "val bar    123")

    def test_doubleref_remove(self):
        self.d.setVar("TEST", "${VAL} ${BAR}")
        self.d.setVar("TEST_remove", "val")
        self.d.setVar("TEST_TEST", "${TEST} ${TEST}")
        self.assertEqual(self.d.getVar("TEST_TEST"), "bar bar")

    def test_empty_remove(self):
        self.d.setVar("TEST", "")
        self.d.setVar("TEST_remove", "val")
        self.assertEqual(self.d.getVar("TEST"), "")

    def test_remove_expansion(self):
        self.d.setVar("BAR", "Z")
        self.d.setVar("TEST", "${BAR}/X Y")
        self.d.setVar("TEST_remove", "${BAR}/X")
        self.assertEqual(self.d.getVar("TEST"), "Y")

    def test_remove_expansion_items(self):
        self.d.setVar("TEST", "A B C D")
        self.d.setVar("BAR", "B D")
        self.d.setVar("TEST_remove", "${BAR}")
        self.assertEqual(self.d.getVar("TEST"), "A C")

class TestOverrides(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d.setVar("OVERRIDES", "foo:bar:local")
        self.d.setVar("TEST", "testvalue")

    def test_no_override(self):
        self.assertEqual(self.d.getVar("TEST"), "testvalue")

    def test_one_override(self):
        self.d.setVar("TEST_bar", "testvalue2")
        self.assertEqual(self.d.getVar("TEST"), "testvalue2")

    def test_one_override_unset(self):
        self.d.setVar("TEST2_bar", "testvalue2")

        self.assertEqual(self.d.getVar("TEST2"), "testvalue2")
        self.assertCountEqual(list(self.d.keys()), ['TEST', 'TEST2', 'OVERRIDES', 'TEST2_bar'])

    def test_multiple_override(self):
        self.d.setVar("TEST_bar", "testvalue2")
        self.d.setVar("TEST_local", "testvalue3")
        self.d.setVar("TEST_foo", "testvalue4")
        self.assertEqual(self.d.getVar("TEST"), "testvalue3")
        self.assertCountEqual(list(self.d.keys()), ['TEST', 'TEST_foo', 'OVERRIDES', 'TEST_bar', 'TEST_local'])

    def test_multiple_combined_overrides(self):
        self.d.setVar("TEST_local_foo_bar", "testvalue3")
        self.assertEqual(self.d.getVar("TEST"), "testvalue3")

    def test_multiple_overrides_unset(self):
        self.d.setVar("TEST2_local_foo_bar", "testvalue3")
        self.assertEqual(self.d.getVar("TEST2"), "testvalue3")

    def test_keyexpansion_override(self):
        self.d.setVar("LOCAL", "local")
        self.d.setVar("TEST_bar", "testvalue2")
        self.d.setVar("TEST_${LOCAL}", "testvalue3")
        self.d.setVar("TEST_foo", "testvalue4")
        bb.data.expandKeys(self.d)
        self.assertEqual(self.d.getVar("TEST"), "testvalue3")

    def test_rename_override(self):
        self.d.setVar("ALTERNATIVE_ncurses-tools_class-target", "a")
        self.d.setVar("OVERRIDES", "class-target")
        self.d.renameVar("ALTERNATIVE_ncurses-tools", "ALTERNATIVE_lib32-ncurses-tools")
        self.assertEqual(self.d.getVar("ALTERNATIVE_lib32-ncurses-tools"), "a")

    def test_underscore_override(self):
        self.d.setVar("TEST_bar", "testvalue2")
        self.d.setVar("TEST_some_val", "testvalue3")
        self.d.setVar("TEST_foo", "testvalue4")
        self.d.setVar("OVERRIDES", "foo:bar:some_val")
        self.assertEqual(self.d.getVar("TEST"), "testvalue3")

class TestKeyExpansion(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d.setVar("FOO", "foo")
        self.d.setVar("BAR", "foo")

    def test_keyexpand(self):
        self.d.setVar("VAL_${FOO}", "A")
        self.d.setVar("VAL_${BAR}", "B")
        with LogRecord() as logs:
            bb.data.expandKeys(self.d)
            self.assertTrue(logContains("Variable key VAL_${FOO} (A) replaces original key VAL_foo (B)", logs))
        self.assertEqual(self.d.getVar("VAL_foo"), "A")

class TestFlags(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d.setVar("foo", "value of foo")
        self.d.setVarFlag("foo", "flag1", "value of flag1")
        self.d.setVarFlag("foo", "flag2", "value of flag2")

    def test_setflag(self):
        self.assertEqual(self.d.getVarFlag("foo", "flag1", False), "value of flag1")
        self.assertEqual(self.d.getVarFlag("foo", "flag2", False), "value of flag2")

    def test_delflag(self):
        self.d.delVarFlag("foo", "flag2")
        self.assertEqual(self.d.getVarFlag("foo", "flag1", False), "value of flag1")
        self.assertEqual(self.d.getVarFlag("foo", "flag2", False), None)


class Contains(unittest.TestCase):
    def setUp(self):
        self.d = bb.data.init()
        self.d.setVar("SOMEFLAG", "a b c")

    def test_contains(self):
        self.assertTrue(bb.utils.contains("SOMEFLAG", "a", True, False, self.d))
        self.assertTrue(bb.utils.contains("SOMEFLAG", "b", True, False, self.d))
        self.assertTrue(bb.utils.contains("SOMEFLAG", "c", True, False, self.d))

        self.assertTrue(bb.utils.contains("SOMEFLAG", "a b", True, False, self.d))
        self.assertTrue(bb.utils.contains("SOMEFLAG", "b c", True, False, self.d))
        self.assertTrue(bb.utils.contains("SOMEFLAG", "c a", True, False, self.d))

        self.assertTrue(bb.utils.contains("SOMEFLAG", "a b c", True, False, self.d))
        self.assertTrue(bb.utils.contains("SOMEFLAG", "c b a", True, False, self.d))

        self.assertFalse(bb.utils.contains("SOMEFLAG", "x", True, False, self.d))
        self.assertFalse(bb.utils.contains("SOMEFLAG", "a x", True, False, self.d))
        self.assertFalse(bb.utils.contains("SOMEFLAG", "x c b", True, False, self.d))
        self.assertFalse(bb.utils.contains("SOMEFLAG", "x c b a", True, False, self.d))

    def test_contains_any(self):
        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "a", True, False, self.d))
        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "b", True, False, self.d))
        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "c", True, False, self.d))

        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "a b", True, False, self.d))
        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "b c", True, False, self.d))
        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "c a", True, False, self.d))

        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "a x", True, False, self.d))
        self.assertTrue(bb.utils.contains_any("SOMEFLAG", "x c", True, False, self.d))

        self.assertFalse(bb.utils.contains_any("SOMEFLAG", "x", True, False, self.d))
        self.assertFalse(bb.utils.contains_any("SOMEFLAG", "x y z", True, False, self.d))


class Serialize(unittest.TestCase):

    def test_serialize(self):
        import tempfile
        import pickle
        d = bb.data.init()
        d.enableTracking()
        d.setVar('HELLO', 'world')
        d.setVarFlag('HELLO', 'other', 'planet')
        with tempfile.NamedTemporaryFile(delete=False) as tmpfile:
            tmpfilename = tmpfile.name
            pickle.dump(d, tmpfile)

        with open(tmpfilename, 'rb') as f:
            newd = pickle.load(f)

        os.remove(tmpfilename)

        self.assertEqual(d, newd)
        self.assertEqual(newd.getVar('HELLO'), 'world')
        self.assertEqual(newd.getVarFlag('HELLO', 'other'), 'planet')


# Remote datastore tests
# These really only test the interface, since in actual usage we have a
# tinfoil connector that does everything over RPC, and this doesn't test
# that.

class TestConnector:
    d = None
    def __init__(self, d):
        self.d = d
    def getVar(self, name):
        return self.d._findVar(name)
    def getKeys(self):
        return set(self.d.keys())
    def getVarHistory(self, name):
        return self.d.varhistory.variable(name)
    def expandPythonRef(self, varname, expr, d):
        localdata = self.d.createCopy()
        for key in d.localkeys():
            localdata.setVar(d.getVar(key))
        varparse = bb.data_smart.VariableParse(varname, localdata)
        return varparse.python_sub(expr)
    def setVar(self, name, value):
        self.d.setVar(name, value)
    def setVarFlag(self, name, flag, value):
        self.d.setVarFlag(name, flag, value)
    def delVar(self, name):
        self.d.delVar(name)
        return False
    def delVarFlag(self, name, flag):
        self.d.delVarFlag(name, flag)
        return False
    def renameVar(self, name, newname):
        self.d.renameVar(name, newname)
        return False

class Remote(unittest.TestCase):
    def test_remote(self):

        d1 = bb.data.init()
        d1.enableTracking()
        d2 = bb.data.init()
        d2.enableTracking()
        connector = TestConnector(d1)

        d2.setVar('_remote_data', connector)

        d1.setVar('HELLO', 'world')
        d1.setVarFlag('OTHER', 'flagname', 'flagvalue')
        self.assertEqual(d2.getVar('HELLO'), 'world')
        self.assertEqual(d2.expand('${HELLO}'), 'world')
        self.assertEqual(d2.expand('${@d.getVar("HELLO")}'), 'world')
        self.assertIn('flagname', d2.getVarFlags('OTHER'))
        self.assertEqual(d2.getVarFlag('OTHER', 'flagname'), 'flagvalue')
        self.assertEqual(d1.varhistory.variable('HELLO'), d2.varhistory.variable('HELLO'))
        # Test setVar on client side affects server
        d2.setVar('HELLO', 'other-world')
        self.assertEqual(d1.getVar('HELLO'), 'other-world')
        # Test setVarFlag on client side affects server
        d2.setVarFlag('HELLO', 'flagname', 'flagvalue')
        self.assertEqual(d1.getVarFlag('HELLO', 'flagname'), 'flagvalue')
        # Test client side data is incorporated in python expansion (which is done on server)
        d2.setVar('FOO', 'bar')
        self.assertEqual(d2.expand('${@d.getVar("FOO")}'), 'bar')
        # Test overrides work
        d1.setVar('FOO_test', 'baz')
        d1.appendVar('OVERRIDES', ':test')
        self.assertEqual(d2.getVar('FOO'), 'baz')


# Remote equivalents of local test classes
# Note that these aren't perfect since we only test in one direction

class RemoteDataExpansions(DataExpansions):
    def setUp(self):
        self.d1 = bb.data.init()
        self.d = bb.data.init()
        self.d1["foo"] = "value_of_foo"
        self.d1["bar"] = "value_of_bar"
        self.d1["value_of_foo"] = "value_of_'value_of_foo'"
        connector = TestConnector(self.d1)
        self.d.setVar('_remote_data', connector)

class TestRemoteNestedExpansions(TestNestedExpansions):
    def setUp(self):
        self.d1 = bb.data.init()
        self.d = bb.data.init()
        self.d1["foo"] = "foo"
        self.d1["bar"] = "bar"
        self.d1["value_of_foobar"] = "187"
        connector = TestConnector(self.d1)
        self.d.setVar('_remote_data', connector)

class TestRemoteConcat(TestConcat):
    def setUp(self):
        self.d1 = bb.data.init()
        self.d = bb.data.init()
        self.d1.setVar("FOO", "foo")
        self.d1.setVar("VAL", "val")
        self.d1.setVar("BAR", "bar")
        connector = TestConnector(self.d1)
        self.d.setVar('_remote_data', connector)

class TestRemoteConcatOverride(TestConcatOverride):
    def setUp(self):
        self.d1 = bb.data.init()
        self.d = bb.data.init()
        self.d1.setVar("FOO", "foo")
        self.d1.setVar("VAL", "val")
        self.d1.setVar("BAR", "bar")
        connector = TestConnector(self.d1)
        self.d.setVar('_remote_data', connector)

class TestRemoteOverrides(TestOverrides):
    def setUp(self):
        self.d1 = bb.data.init()
        self.d = bb.data.init()
        self.d1.setVar("OVERRIDES", "foo:bar:local")
        self.d1.setVar("TEST", "testvalue")
        connector = TestConnector(self.d1)
        self.d.setVar('_remote_data', connector)

class TestRemoteKeyExpansion(TestKeyExpansion):
    def setUp(self):
        self.d1 = bb.data.init()
        self.d = bb.data.init()
        self.d1.setVar("FOO", "foo")
        self.d1.setVar("BAR", "foo")
        connector = TestConnector(self.d1)
        self.d.setVar('_remote_data', connector)

class TestRemoteFlags(TestFlags):
    def setUp(self):
        self.d1 = bb.data.init()
        self.d = bb.data.init()
        self.d1.setVar("foo", "value of foo")
        self.d1.setVarFlag("foo", "flag1", "value of flag1")
        self.d1.setVarFlag("foo", "flag2", "value of flag2")
        connector = TestConnector(self.d1)
        self.d.setVar('_remote_data', connector)