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verify that PagerSplitter can collect data page by page #299

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Merged
merged 1 commit into from
Feb 11, 2019
Merged

verify that PagerSplitter can collect data page by page #299

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22 changes: 22 additions & 0 deletions src/test/java/org/gitlab4j/api/PagerSpliteratorTest.java
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package org.gitlab4j.api;

import java.util.Collections;
import java.util.stream.StreamSupport;

import org.junit.Assert;
import org.junit.Before;
Expand All @@ -9,6 +10,8 @@
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;

import static java.util.Arrays.asList;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
Expand Down Expand Up @@ -53,4 +56,23 @@ public void shouldThrowNullPointerExceptionWhenActionIsMissing() {
assertEquals(NullPointerException.class, e.getClass());
}
}

@Test
public void shouldAllowToGatherDataPageByPage() {
when(pager.hasNext()).thenReturn(true);
when(pager.getTotalItems()).thenReturn(12);
when(pager.next())
.thenReturn(asList(1, 2, 3))
.thenReturn(asList(4, 5, 6))
.thenReturn(asList(7, 8, 9))
.thenReturn(asList(0, 1, 2));

Integer[] elements = StreamSupport.stream(new PagerSpliterator<Integer>(pager), false)
.parallel() // should be ignored
.skip(2) // should be ignored
.limit(5)
.toArray(Integer[]::new);

assertArrayEquals(new Integer[]{1, 2, 3, 4, 5}, elements);
}
}