Test by rule parts

src/test/groovy/net/fortuna/ical4j/transform/recurrence/ByWeekNoRuleTest.groovy

@@ -0,0 +1,27 @@
+package net.fortuna.ical4j.transform.recurrence
+
+import net.fortuna.ical4j.model.Date
+import net.fortuna.ical4j.model.DateList
+import net.fortuna.ical4j.model.NumberList
+import net.fortuna.ical4j.model.parameter.Value
+import spock.lang.Specification
+
+class ByWeekNoRuleTest extends Specification {
+
+    def 'verify transformations by week number'() {
+        given: 'a byweekno rule'
+        ByWeekNoRule rule = [new NumberList(byWeekNoPart)]
+
+        and: 'a list of dates'
+        DateList dateList = [Value.DATE]
+        dateList.addAll(dates)
+
+        expect: 'the rule transforms the dates correctly'
+        rule.transform(dateList) == expectedResult
+
+        where:
+        byWeekNoPart     | dates                  | expectedResult
+        '1,2,3'         | [new Date('20150103')] | [new Date('20150103'), new Date('20150110'), new Date('20150117')]
+        '1,3,5'         | [new Date('20150630')] | [new Date('20141230'), new Date('20150113'), new Date('20150127')]
+    }
+}