Fix broken unit test

Author: paragonie-security

tests/Planner/FieldIndexPlannerTest.php

@@ -72,6 +72,15 @@ public function testPlannerExtremes()
             ->addExistingIndex('name', 32, PHP_INT_MAX)
             ->addExistingIndex('first_initial_last_name', 16, PHP_INT_MAX)
             ->addExistingIndex('initials', 16, PHP_INT_MAX);
+        try {
+            $planner->recommend();
+            $this->fail(
+                'Planner should throw an exception if it cannot offer safe recommendations.'
+            );
+        } catch (PlannerException $ex) {
+            $this->assertSame('Populations less than 16 are too small to make recommendations on', $ex->getMessage());
+        }
+        $planner->setEstimatedPopulation(16);
         try {
             $planner->recommend();
             $this->fail(