@Test
void get() {

    assertThat(message.get("key1", "zh")).isEqualTo("value1");
    assertThat(message.get("key1", "en")).isEqualTo("value1");
    assertThat(message.get("key1", "en_US")).isEqualTo("value1");
    assertThat(message.get("key2", "zh")).isEqualTo("value2");
    assertThat(message.get("key2", "en")).isEqualTo("en_value2");
    assertThat(message.get("key2", "en_US")).isEqualTo("en_value2");
    assertThat(message.get("key3", "zh")).isEqualTo("value3");
    assertThat(message.get("key3", "en")).isEqualTo("en_value3");
    assertThat(message.get("key3", "en_US")).isEqualTo("en_US_value3");
}