ICM: Tests added.

Author: dmitry-ivanov

tests/MutexTest.php

@@ -13,4 +13,14 @@ public function it_has_one_required_constructor_argument_which_is_command()
         $mutex = new Mutex($command);
         $this->assertInstanceOf(Mutex::class, $mutex);
     }
+
+    /** @test */
+    public function it_determines_mutex_strategy_once_while_creation()
+    {
+        $command = Mockery::mock(GenericCommand::class)->makePartial();
+        $command->shouldReceive('argument')->withNoArgs()->once()->andReturn(['foo' => 'bar']);
+
+        $mutex = new Mutex($command);
+        $this->assertSame($mutex->getStrategy(), $mutex->getStrategy());
+    }
 }