use phpunit 5.7 for tests (#10)

Author: shieldo

Tests/Validator/FixedLengthDigitPostalCodeValidatorTest.php

@@ -12,7 +12,7 @@ class FixedLengthDigitPostalCodeValidatorTest extends \PHPUnit_Framework_TestCas
     protected function setUp()
     {
         $this->validator = new FixedLengthDigitPostalCodeValidator();
-        $this->context = $this->getMock(ExecutionContextInterface::class);
+        $this->context = $this->createMock(ExecutionContextInterface::class);
         $this->validator->initialize($this->context);
     }
 

Tests/Validator/RegexPostalCodeValidatorTest.php

@@ -15,8 +15,8 @@ class RegexPostalCodeValidatorTest extends \PHPUnit_Framework_TestCase
 {
     public function setUp()
     {
-        $this->regexValidator = $this->getMock(ConstraintValidatorInterface::class);
-        $this->notBlankValidator = $this->getMock(ConstraintValidatorInterface::class);
+        $this->regexValidator = $this->createMock(ConstraintValidatorInterface::class);
+        $this->notBlankValidator = $this->createMock(ConstraintValidatorInterface::class);
         $this->validator = new RegexPostalCodeValidator($this->regexValidator, $this->notBlankValidator);
     }
 
@@ -29,7 +29,7 @@ public function testValidateInitializesAndDelegatesOnValidators()
     {
         $constraint = new PostalCodeConstraint();
         $constraint->message = 'message';
-        $context = $this->getMock(ExecutionContextInterface::class);
+        $context = $this->createMock(ExecutionContextInterface::class);
         $value = 'i am a value';
         $this->regexValidator
             ->expects($this->at(0))

composer.json

@@ -21,7 +21,7 @@
     },
     "require-dev": {
         "symfony/validator": "~2.7|~3.0",
-        "phpunit/phpunit": "4.*",
+        "phpunit/phpunit": "~5.7",
         "mockery/mockery": "~0.9.0",
         "symfony/console": "~2.7|~3.0"
     },