@Test
void testConversion() {
IntegerConverter integerConverter = new IntegerConverter();
assertNull(integerConverter.convert(null));
assertEquals(Integer.valueOf(1), integerConverter.convert(Integer.valueOf(1)));
assertEquals(Integer.valueOf(1), integerConverter.convert(Short.valueOf((short) 1)));
assertEquals(Integer.valueOf(1), integerConverter.convert(Double.valueOf(1.0D)));
assertEquals(Integer.valueOf(1), integerConverter.convert("1"));
assertEquals(Integer.valueOf(1), integerConverter.convert(" 1 "));
assertEquals(Integer.valueOf(1), integerConverter.convert(" +1 "));
assertEquals(Integer.valueOf(-1), integerConverter.convert(" -1 "));
assertEquals(Integer.valueOf(2147483647), integerConverter.convert(" +2147483647 "));
assertEquals(Integer.valueOf(-2147483648), integerConverter.convert(" -2147483648 "));
assertEquals(Integer.valueOf(1), integerConverter.convert(" 2147483648 "));
fail("error");
} catch (TypeConversionException ignore) {
assertEquals(Integer.valueOf(1), integerConverter.convert(" -2147483649 "));
fail("error");
} catch (TypeConversionException ignore) {
integerConverter.convert("a");
fail("error");
} catch (TypeConversionException ignore) {