@Override
    public Map<String, String> asMap() {
        return envVarMap;
    }
@Test
    public void shouldReturnEnvVarsMap() throws Exception {
        Map<String, String> envMap = envVars.asMap();
        assertThat(envMap.keySet().containsAll(keys), is(true));
        assertThat(envMap.values().containsAll(values), is(true));
        for (int i = 0; i < keys.size(); i++) {
            assertThat(envMap.get(keys.get(i)), is(values.get(i)));
        }
    }