DefaultUtilsSpecTest.java

class DefaultUtilsSpecTest extends Specification {
    @Unroll
    def "test defaults (#a #b #c) = #d"(String a, String b, String c, String d){
        expect:
            DefaultUtils.defaultIfNull(a, b, c) == d
        where:
            a      | b     | c         | d
            "val1" | null  | "default" | "val1"
            null   | "val2"| "default" | "val2"
            null   | null  | "default" | "default"
    }
}