Unit tests for ListDatabases and ListIndexes options

tests/Operation/ListDatabasesTest.php

+<?php
+
+namespace MongoDB\Tests\Operation;
+
+use MongoDB\Operation\ListDatabases;
+
+class ListDatabasesTest extends TestCase
+{
+    /**
+     * @expectedException MongoDB\Exception\InvalidArgumentException
+     * @dataProvider provideInvalidConstructorOptions
+     */
+    public function testConstructorOptionTypeChecks(array $options)
+    {
+        new ListDatabases($options);
+    }
+
+    public function provideInvalidConstructorOptions()
+    {
+        $options = [];
+
+        foreach ($this->getInvalidIntegerValues() as $value) {
+            $options[][] = ['maxTimeMS' => $value];
+        }
+
+        return $options;
+    }
+}

tests/Operation/ListIndexesTest.php

+<?php
+
+namespace MongoDB\Tests\Operation;
+
+use MongoDB\Operation\ListIndexes;
+
+class ListIndexesTest extends TestCase
+{
+    /**
+     * @expectedException MongoDB\Exception\InvalidArgumentException
+     * @dataProvider provideInvalidConstructorOptions
+     */
+    public function testConstructorOptionTypeChecks(array $options)
+    {
+        new ListIndexes($this->getDatabaseName(), $this->getCollectionName(), $options);
+    }
+
+    public function provideInvalidConstructorOptions()
+    {
+        $options = [];
+
+        foreach ($this->getInvalidIntegerValues() as $value) {
+            $options[][] = ['maxTimeMS' => $value];
+        }
+
+        return $options;
+    }
+}