### Question:
ExecUtils { public static boolean isARM() { final String arch = System.getProperty("os.arch").toLowerCase(); return isARM(arch); }  static File find(String executable, File... dirs); static File findExecutableInDirectory(String executable, File directory); static File findExecutableInSystemPath(String executable); static boolean isWindows(); static boolean isWindows(String os); static boolean isMac(); static boolean isMac(String os); static boolean isLinux(); static boolean isLinux(String os); static boolean is64bits(); static boolean is64bits(String arch); static boolean isARM();  }### Answer:
@Test public void testIsARM() throws Exception { assertThat(ExecUtils.isARM("x86")).isFalse(); assertThat(ExecUtils.isARM("x86_64")).isFalse(); assertThat(ExecUtils.isARM("ARM")).isTrue(); }