### Question:
PackagingProviderConverter implements Converter<PackagingProvider> { public PackagingProvider convertFromText(final String value, final Class<?> targetType, final String optionContext) { final PackagingProvider packagingProvider = packagingProviderRegistry.getPackagingProvider(value); Validate.notNull(packagingProvider, "Unsupported packaging id '%s'", value); return packagingProvider; }  PackagingProvider convertFromText(final String value, final Class<?> targetType,
      final String optionContext); boolean getAllPossibleValues(final List<Completion> completions,
      final Class<?> targetType, final String existingData, final String optionContext,
      final MethodTarget target); boolean supports(final Class<?> type, final String optionContext);  }### Answer:
@Test public void testConvertValidString() { final String id = "some-id"; when(mockPackagingProviderRegistry.getPackagingProvider(id)).thenReturn(mockCoreJarPackaging); final PackagingProvider packagingProvider = converter.convertFromText(id, PackagingProvider.class, null); assertEquals(mockCoreJarPackaging, packagingProvider); }