During test mode archive.extracted returns result=None when it should return result=True; breaks prereq.

Description of Issue/Question

archive.extracted does not detect it's own correct state during a test run. This causes any states depending on it in prereq to always run, even when there are no changes for the state.

Setup

extract_state:
  archive.extracted:
    - name: /opt/salt-bootstrap
    - source: https://github.com/saltstack/salt-bootstrap/archive/v2019.01.08.tar.gz
    - source_hash: 38ae8f0b6a32c5fb23e27c37a4e321f8

prereq_state:
  cmd.run:
    - name: 'echo I should only run when the archive is going to be extracted'
    - prereq:
      - archive: extract_state

Steps to Reproduce Issue

Run the above state twice

local:
----------
          ID: prereq_state
    Function: cmd.run
        Name: echo I should only run when the archive is going to be extracted
      Result: True
     Comment: Command "echo I should only run when the archive is going to be extracted" run
     Started: 14:08:45.874769
    Duration: 8.299 ms
     Changes:   
              ----------
              pid:
                  2374
              retcode:
                  0
              stderr:
              stdout:
                  I should only run when the archive is going to be extracted
----------
          ID: extract_state
    Function: archive.extracted
        Name: /opt/salt-bootstrap
      Result: True
     Comment: All files in archive are already present
     Started: 14:08:45.883397
    Duration: 36.349 ms
     Changes:   

Summary for local
------------
Succeeded: 2 (changed=1)
Failed:    0
------------
Total states run:     2
Total run time:  44.648 ms

Versions Report

Salt Version:
           Salt: 2019.2.0
 
Dependency Versions:
           cffi: Not Installed
       cherrypy: Not Installed
       dateutil: 2.7.0
      docker-py: Not Installed
          gitdb: Not Installed
      gitpython: Not Installed
          ioflo: Not Installed
         Jinja2: 2.10
        libgit2: Not Installed
        libnacl: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.5.6
   mysql-python: Not Installed
      pycparser: Not Installed
       pycrypto: 2.6.1
   pycryptodome: Not Installed
         pygit2: Not Installed
         Python: 2.7.15 (default, Oct 15 2018, 15:26:09)
   python-gnupg: Not Installed
         PyYAML: 4.2
          PyZMQ: 17.0.0
           RAET: Not Installed
          smmap: Not Installed
        timelib: Not Installed
        Tornado: 5.0.2
            ZMQ: 4.1.6
 
System Versions:
           dist: fedora 29 Twenty Nine
         locale: ANSI_X3.4-1968
        machine: x86_64
        release: 4.20.4-200.fc29.x86_64
         system: Linux
        version: Fedora 29 Twenty Nine

Start at the archive.extracted execution path and its test-mode handling, then trace how its result is consumed by prereq. Reproduce the provided state twice and verify that an unchanged archive reports result=True without running the dependent command; add or update coverage for this behavior if the relevant test location is found.