### Question:
Conditions { public static void isTrue(boolean test, @Nullable Object message) { if (!test) { throw new IllegalArgumentException(String.valueOf(message)); } }  static void isTrue(boolean test, @Nullable Object message); static void isTrue(boolean test); static void isTrue(boolean test, @NotNull String message, @Nullable Object... args); static void nonNull(@Nullable Object obj); static void nonNull(@Nullable Object obj, @Nullable Object message);  }### Answer:
@Test void testIsTrue() { Assertions.assertThrows(IllegalArgumentException.class, () -> Conditions.isTrue(false)); }