What is the idiomatic Hamcrest pattern to assert that each element of an iterable matches a given matcher?

Question

Examine the following snippet:

    assertThat(
        Arrays.asList(\"1x\", \"2x\", \"3x\", \"4z\"),
        not(hasItem(not(endsWith(\"x\"))))
    );
         


        

Answer 1

You are looking for everyItem():

assertThat(
    Arrays.asList("1x", "2x", "3x", "4z"),
    everyItem(endsWith("x"))
);

This produces a nice failure message:

Expected: every item is a string ending with "x"
     but: an item was "4z"