### Question:
MimetypeAwareRequestParameters extends MultiValueRequestParameters { public boolean isValid() { if (this.isEmpty()) { return false; } try { ContentType.create(getSingleValue(MIME_TYPE), getSingleValue(CHARSET)); } catch(final UnsupportedCharsetException uce) { return false; } return true; }  void setType(final String mimetype); void setCharset(final Charset charset); @Override boolean isEmpty(); boolean isValid(); boolean isSetMimetype(); static final String MIME_TYPE; static final String CHARSET; }### Answer:
@Test public void shouldBeInvalidAfterCreate(){ assertThat(new MimetypeAwareRequestParametersSeam().isValid(), is(false)); }