if (StringUtil.isBlank(logFormat)) {
            useEcsFormat = "docker".equals(getEnvMap().get("FESS_APP_TYPE"));
        } else if ("ecs".equals(logFormat)) {
            useEcsFormat = true;
        }
    }

    /**
     * Get the environment map.
     * @return The environment map.
     */
    protected Map<String, String> getEnvMap() {
        if (envMap != null) {
            return envMap;
        }

        TestEnvVarSource(Map<String, String> envVarMap) {
            this.envVarMap = envVarMap;
        }

        @Override
        public Map<String, String> getEnvMap() {
            return envVarMap;
        }
    }

    }

    /**
     * Gets the hostname of the local machine.
     *
     * @return The hostname.
     */
    public String getHostname() {
        final Map<String, String> env = getEnvMap();
        if (env.containsKey("COMPUTERNAME")) {
            return env.get("COMPUTERNAME");
        }
        if (env.containsKey("HOSTNAME")) {
            return env.get("HOSTNAME");
        }

            }

            @Override
            public void updateSystemProperties() {
            }

            @Override
            protected Map<String, String> getEnvMap() {
                return envMap;
            }

            @Override
            protected File getDesignJspFile(String path) {
                return new File(desginJspRootFile, path);
            }

        activityHelper.setEnvMap(testEnv);
        assertEquals(testEnv, activityHelper.getEnvMap());
    }

    @Test
    public void test_getEnvMap_withoutCustomMap() {
        activityHelper.setEnvMap(null);
        Map<String, String> envMap = activityHelper.getEnvMap();
        assertNotNull(envMap);
    }

    @Test
    public void test_init_withDockerEnvironment() {