Demonstrates problem with reading back yaml containing corrupted UTF-8 characters

YamlEncodingSpec.groovy

package yaml.encoding

import org.yaml.snakeyaml.Yaml
import spock.lang.*

@Unroll
class YamlEncodingSpec extends Specification {

    Yaml yaml = new Yaml()
    File file

    void setup() {
        file = File.createTempFile('data', '.yaml')
    }

    void cleanup() {
        file.delete()
    }

    void 'can read back data encoded as #assumedCharset'() {
        given:
        def originalObject = [s: new String(bytes, assumedCharset)]
        file.withWriter { writer ->
            yaml.dump(originalObject, writer)
        }

        when:
        def loadedObject = file.withInputStream { stream ->
            yaml.load(stream)
        }

        then:
        loadedObject.s == originalObject.s

        where:
        assumedCharset << ['UTF-8', 'ISO-8859-1']
        bytes = 'dt:before{content:"\u2666 "}'.getBytes('UTF-8')
    }

}

Exception occurs on line 29 when assumedCharset is "ISO-8859-1"