Add env config test

tests/test_plugin/test_plugin.py

@@ -107,3 +107,20 @@ def test_intermediate_1(tmpdir):
     pytest_ret_code = popen_pytest.wait()
 
     assert pytest_ret_code == 0
+
+
+@patch.dict("os.environ",
+            {"REDIS_PATH": "test_redis",
+             "REDIS_ARGS": "--test_arg = test_val",
+             "REDIS_PORT": "1234"})
+def test_env_redis_1(monkeypatch):
+    # REDIS_PATH
+    # REDIS_ARGS
+    # REDIS_PORT
+    # del status_plugin
+    monkeypatch.setenv("REDIS_PATH", "test")
+    print("recalc")
+    status_plugin.calc_globals()
+
+    redis_cmd_final = status_plugin.command_redis_server
+    assert(redis_cmd_final == "test_redis --port 1234 --test_arg=test_val")