### Question:
EnvironmentVariableProvider { public boolean hasEnv(String name) { return Optional.ofNullable(getEnv(name)).isPresent(); }  String getEnv(String name); char[] getEnvAsCharArray(String name); boolean hasEnv(String name);  }### Answer:
@Test public void hasEnv() { assertThat(provider.hasEnv("env")).isFalse(); }