Use namespaced test case

This implies dropping phpunit < 5.4, and is therefore major, because phpunit
is in the require-dev section of the Composer manifest, which means it
is not an explicit dependency of this package.
Dropping phpunit 4 means in turn dropping php 5.3 through 5.5 .
Refs #66

Author: greg0ire

.travis.yml

@@ -3,17 +3,14 @@ sudo: false
 language: php
 
 php:
-  - 5.3
-  - 5.4
-  - 5.5
   - 5.6
   - 7.0
   - hhvm
 
 matrix:
   fast_finish: true
   include:
-    - php: 5.3
+    - php: 5.6
       env: deps="low"
     - php: 7.0
       env: SYMFONY_DI_VERSION=2.3.*

PhpUnit/AbstractContainerBuilderTestCase.php

@@ -2,10 +2,11 @@
 
 namespace Matthias\SymfonyDependencyInjectionTest\PhpUnit;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 
-abstract class AbstractContainerBuilderTestCase extends \PHPUnit_Framework_TestCase
+abstract class AbstractContainerBuilderTestCase extends TestCase
 {
     /**
      * @var ContainerBuilder

PhpUnit/AbstractExtensionConfigurationTestCase.php

@@ -5,10 +5,11 @@
 use Matthias\SymfonyConfigTest\PhpUnit\ProcessedConfigurationEqualsConstraint;
 use Matthias\SymfonyDependencyInjectionTest\Loader\ExtensionConfigurationBuilder;
 use Matthias\SymfonyDependencyInjectionTest\Loader\LoaderFactory;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
 
-abstract class AbstractExtensionConfigurationTestCase extends \PHPUnit_Framework_TestCase
+abstract class AbstractExtensionConfigurationTestCase extends TestCase
 {
     /**
      * Return an instance of the container extension that you are testing.

Tests/Loader/LoaderFactoryTest.php

@@ -3,8 +3,9 @@
 namespace Matthias\SymfonyDependencyInjectionTest\Tests\Loader;
 
 use Matthias\SymfonyDependencyInjectionTest\Loader\LoaderFactory;
+use PHPUnit\Framework\TestCase;
 
-class LoaderFactoryTest extends \PHPUnit_Framework_TestCase
+class LoaderFactoryTest extends TestCase
 {
     /**
      * @test

Tests/PhpUnit/ContainerBuilderHasAliasConstraintTest.php

@@ -3,9 +3,10 @@
 namespace Matthias\SymfonyDependencyInjectionTest\Tests\PhpUnit;
 
 use Matthias\SymfonyDependencyInjectionTest\PhpUnit\ContainerBuilderHasAliasConstraint;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class ContainerBuilderHasAliasConstraintTest extends \PHPUnit_Framework_TestCase
+class ContainerBuilderHasAliasConstraintTest extends TestCase
 {
     /**
      * @test

Tests/PhpUnit/ContainerBuilderHasServiceDefinitionConstraintTest.php

@@ -3,10 +3,11 @@
 namespace Matthias\SymfonyDependencyInjectionTest\Tests\PhpUnit\DependencyInjection;
 
 use Matthias\SymfonyDependencyInjectionTest\PhpUnit\ContainerBuilderHasServiceDefinitionConstraint;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 
-class ContainerBuilderHasServiceDefinitionConstraintTest extends \PHPUnit_Framework_TestCase
+class ContainerBuilderHasServiceDefinitionConstraintTest extends TestCase
 {
     /**
      * @test

Tests/PhpUnit/ContainerBuilderHasSyntheticServiceConstraintTest.php

@@ -3,10 +3,11 @@
 namespace Matthias\SymfonyDependencyInjectionTest\Tests\PhpUnit\DependencyInjection;
 
 use Matthias\SymfonyDependencyInjectionTest\PhpUnit\ContainerBuilderHasSyntheticServiceConstraint;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 
-class ContainerBuilderHasSyntheticServiceConstraintTest extends \PHPUnit_Framework_TestCase
+class ContainerBuilderHasSyntheticServiceConstraintTest extends TestCase
 {
     /**
      * @var ContainerBuilder

Tests/PhpUnit/ContainerHasParameterConstraintTest.php

@@ -3,9 +3,10 @@
 namespace Matthias\SymfonyDependencyInjectionTest\Tests\PhpUnit\DependencyInjection;
 
 use Matthias\SymfonyDependencyInjectionTest\PhpUnit\ContainerHasParameterConstraint;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
-class ContainerHasParameterConstraintTest extends \PHPUnit_Framework_TestCase
+class ContainerHasParameterConstraintTest extends TestCase
 {
     /**
      * @test

Tests/PhpUnit/DefinitionHasArgumentConstraintTest.php

@@ -3,10 +3,11 @@
 namespace Matthias\SymfonyDependencyInjectionTest\Tests\PhpUnit\DependencyInjection;
 
 use Matthias\SymfonyDependencyInjectionTest\PhpUnit\DefinitionHasArgumentConstraint;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 
-class DefinitionHasArgumentConstraintTest extends \PHPUnit_Framework_TestCase
+class DefinitionHasArgumentConstraintTest extends TestCase
 {
     /**
      * @test

Tests/PhpUnit/DefinitionHasMethodCallConstraintTest.php

@@ -3,9 +3,10 @@
 namespace Matthias\SymfonyDependencyInjectionTest\Tests\PhpUnit\DependencyInjection;
 
 use Matthias\SymfonyDependencyInjectionTest\PhpUnit\DefinitionHasMethodCallConstraint;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 
-class DefinitionHasMethodCallConstraintTest extends \PHPUnit_Framework_TestCase
+class DefinitionHasMethodCallConstraintTest extends TestCase
 {
     /**
      * @test