Java – JUnit: use parameterized types – arrays to assert the equality of collections

I try to assert the equality of the following sets:

String[] arr1= new String[] { "1","2","3" };
Collection<String[]> coll1= Arrays.asList(arr1,arr1);

String[] arr2 = new String[] { "1","3" };
Collection<String[]> coll2 = Arrays.asList(arr2,arr2);

assertEquals(coll1,coll2);

However, I got the opposite result - assertion error The problem is using object The equals () method checks whether arrays are equal, which actually checks for references to significantly different arrays

Is there a convenient way I can use JUnit or guava to solve this problem?

Edit: note that I want to compare the collection object, not the array itself

Solution

This is where hamcrest came to rescque This is Javadoc link I recommend using isarraycontininginorder

So

assertThat(coll1,IsArrayContainingInOrder.arrayContaining(coll2));

Sorry, the above applies to arrays, but the following applies to collections

assertThat(coll1,IsIterableContainingInOrder.contains(coll2.toArray()));

This uses isiterablecontaininginorder

For reference only, I find that using hamcrest matchers is so elegant that I rarely use non hamcrest tests So all my tests are like this

assertThat(myValue,is(true));
assertThat(myValue,equalTo("something"));
assertThat(myList,IsIterableContainingInAnyOrder.containsInAnyOrder(first,second,third));

About soap boxes