Rename and reorder CreateIndexes tests

tests/Operation/CreateIndexesTest.php

@@ -8,27 +8,27 @@ class CreateIndexesTest extends TestCase
 {
     /**
      * @expectedException MongoDB\Exception\InvalidArgumentException
-     * @expectedExceptionMessage $indexes is empty
+     * @expectedExceptionMessage $indexes is not a list (unexpected index: "1")
      */
-    public function testCreateIndexesRequiresAtLeastOneIndex()
+    public function testConstructorIndexesArgumentMustBeAList()
     {
-        new CreateIndexes($this->getDatabaseName(), $this->getCollectionName(), []);
+        new CreateIndexes($this->getDatabaseName(), $this->getCollectionName(), [1 => ['key' => ['x' => 1]]]);
     }
 
     /**
      * @expectedException MongoDB\Exception\InvalidArgumentException
-     * @expectedExceptionMessage $indexes is not a list (unexpected index: "1")
+     * @expectedExceptionMessage $indexes is empty
      */
-    public function testConstructorIndexesArgumentMustBeAList()
+    public function testConstructorRequiresAtLeastOneIndex()
     {
-        new CreateIndexes($this->getDatabaseName(), $this->getCollectionName(), [1 => ['key' => ['x' => 1]]]);
+        new CreateIndexes($this->getDatabaseName(), $this->getCollectionName(), []);
     }
 
     /**
      * @expectedException MongoDB\Exception\InvalidArgumentException
      * @dataProvider provideInvalidIndexSpecificationTypes
      */
-    public function testCreateIndexesRequiresIndexSpecificationsToBeAnArray($index)
+    public function testConstructorRequiresIndexSpecificationsToBeAnArray($index)
     {
         new CreateIndexes($this->getDatabaseName(), $this->getCollectionName(), [$index]);
     }