assert Peek operation conforms to wikipedia definition:

peek(D) = pop(D)
peek(D), D = D

Author: Mike Atlas

queue/queue_test.go

@@ -334,12 +334,16 @@ func TestPeek(t *testing.T) {
 	q.Put(`a`)
 	q.Put(`b`)
 	q.Put(`c`)
-	result, err := q.Peek()
-	expected := `c`
-
+	peekResult, err := q.Peek()
+	peekExpected := `a`
 	assert.Nil(t, err)
-	assert.Equal(t, expected, result)
 	assert.Equal(t, q.Len(), int64(3))
+	assert.Equal(t, peekExpected, peekResult)
+
+	popResult, err := q.Get(1)
+	assert.Nil(t, err)
+	assert.Equal(t, peekResult, popResult[0])
+	assert.Equal(t, q.Len(), int64(2))
 }
 
 func TestPeekOnDisposedQueue(t *testing.T) {