Access environment variables through Host object instead of directly.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/systemhost_mock.py

 # Copyright (c) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 10 matching lines @@
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 from StringIO import StringIO
 
-from webkitpy.common.system.environment import Environment
 from webkitpy.common.system.executive_mock import MockExecutive
 from webkitpy.common.system.filesystem_mock import MockFileSystem
 from webkitpy.common.system.platforminfo_mock import MockPlatformInfo
 from webkitpy.common.system.user_mock import MockUser
 from webkitpy.common.system.workspace_mock import MockWorkspace
 
 
 class MockSystemHost(object):
 
     def __init__(self, log_executive=False, executive_throws_when_run=None,
                  os_name=None, os_version=None, executive=None, filesystem=None):
         self.executable = 'python'
         self.executive = executive or MockExecutive(should_log=log_executive, should_throw_when_run=executive_throws_when_run)
         self.filesystem = filesystem or MockFileSystem()
         self.user = MockUser()
         self.platform = MockPlatformInfo()
         if os_name:
             self.platform.os_name = os_name
         if os_version:
             self.platform.os_version = os_version
 
         # FIXME: Should this take pointers to the filesystem and the executive?
         self.workspace = MockWorkspace()
 
         self.stdin = StringIO()
         self.stdout = StringIO()
         self.stderr = StringIO()
-
-    def copy_current_environment(self):
-        return Environment({"MOCK_ENVIRON_COPY": '1'})
+        self.environ = {
+            'MOCK_ENVIRON_COPY': '1',
+            'PATH': '/bin:/mock/bin'
+        }
 
     def print_(self, *args, **kwargs):
         sep = kwargs.get('sep', ' ')
         end = kwargs.get('end', '\n')
         stream = kwargs.get('stream', self.stdout)
         stream.write(sep.join([str(arg) for arg in args]) + end)