@Test
public void toDouble() throws Exception {
assertThat(RubyUtils.toDouble(null)).isNull();
assertThat(RubyUtils.toDouble("")).isNull();
assertThat(RubyUtils.toDouble(" ")).isNull();
assertThat(RubyUtils.toDouble("123")).isEqualTo(123.0);
assertThat(RubyUtils.toDouble("3.14")).isEqualTo(3.14);
assertThat(RubyUtils.toDouble(3.14)).isEqualTo(3.14);
assertThat(RubyUtils.toDouble(123)).isEqualTo(123.0);
assertThat(RubyUtils.toDouble(123L)).isEqualTo(123.0);
}
@Test
public void toDouble_unexpected_class() throws Exception {
throwable.expect(IllegalArgumentException.class);
RubyUtils.toDouble(true);
}