doc = docMapper.parse(json).rootDoc();
f = doc.getFields("b")[0];
assertThat(f, notNullValue());
assertThat(f.name(), equalTo("b"));
assertThat(f.stringValue(), equalTo("-1.0,-1.0"));
assertThat(f.fieldType().stored(), equalTo(false));
assertNotSame(IndexOptions.NONE, f.fieldType().indexOptions());
f = doc.getFields("b")[1];
assertThat(f, notNullValue());