removeDevDependencies() public static method

The dev dependencies should be removed from the stability flags, require-dev and the composer file.
public static removeDevDependencies ( )
 public function testDevDependenciesAreRemoved()
 {
     // Prepare the installer
     OptionalPackages::removeDevDependencies();
     $this->assertComposerHasPackages($this->standardDependencies);
     $this->assertComposerNotHasPackages($this->devDependencies);
 }
 /**
  * @dataProvider packageProvider
  */
 public function testAddPackage($packageName, $packageVersion, $expectedStability)
 {
     // Prepare the installer
     OptionalPackages::removeDevDependencies();
     $io = $this->prophesize('Composer\\IO\\IOInterface');
     $io->write(Argument::containingString('Adding package'))->shouldBeCalled();
     OptionalPackages::addPackage($io->reveal(), $packageName, $packageVersion);
     $this->assertComposerHasPackages(['zendframework/zend-stdlib']);
     $stabilityFlags = $this->getStabilityFlags();
     // Stability flags are only set for non-stable packages
     if ($expectedStability) {
         $this->assertArrayHasKey($packageName, $stabilityFlags);
         $this->assertEquals($expectedStability, $stabilityFlags[$packageName]);
     }
 }
 public function testAnsweredWithPackage()
 {
     // Prepare the installer
     OptionalPackages::removeDevDependencies();
     $io = $this->prophesize('Composer\\IO\\IOInterface');
     $io->write(Argument::containingString('Adding package <info>league/container</info>'))->shouldBeCalled();
     $io->write(Argument::containingString('<warning>You need to edit public/index.php'))->shouldBeCalled();
     $config = $this->getConfig();
     $question = $config['questions']['container'];
     $answer = 'league/container:2.2.0';
     $copyFilesKey = 'minimal-files';
     $result = OptionalPackages::processAnswer($io->reveal(), $question, $answer, $copyFilesKey);
     $this->assertTrue($result);
     $this->assertFileNotExists($this->getProjectRoot() . '/config/container.php');
     $this->assertComposerHasPackages(['league/container']);
 }