takawitter · December 2, 2016 12:13 · Dec 2, 2016
diff --git a/CollectionFixture.java b/CollectionFixture.java
@@ -0,0 +1,38 @@
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.function.Consumer;
+
+public class CollectionFixture<T> {
+	public CollectionFixture(Collection<T> collection){
+		this.collection = collection;
+		this.it = collection.iterator();
+	}
+
+	public CollectionFixture<T> assertHasNext(){
+		assertTrue(it.hasNext());
+		return this;
+	}
+
+	public CollectionFixture<T> assertNotHasNext(){
+		assertFalse(it.hasNext());
+		return this;
+	}
+
+	public CollectionFixture<T> assertSize(int expected){
+		assertEquals(expected, collection.size());
+		return this;
+	}
+
+	@SuppressWarnings("unchecked")
+	public <U extends T> CollectionFixture<T> next(Consumer<U> c){
+		c.accept((U)it.next());
+		return this;
+	}
+
+	private Collection<T> collection;
+	private Iterator<T> it;
+}
diff --git a/SampleTest.java b/SampleTest.java
@@ -0,0 +1,20 @@
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+
+public class SampleTest{
+	static class Fruit{}
+	static class Apple extends Fruit{boolean bitten;}
+	static class Orange extends Fruit{enum Type{Tangerine, Mandarin} Type type = Type.Tangerine;}
+	@Test
+	public void t() throws Throwable{
+		new CollectionFixture<Fruit>(Arrays.asList(new Apple(), new Orange()))
+			.next((Apple f) -> {
+				assertFalse(f.bitten);
+			})
+			.next((Orange f) -> {
+				assertEquals(f.type, Orange.Type.Tangerine);
+			})
+			.assertNotHasNext();
+	}
+
+}