diff --git a/src/Composer/DependencyResolver/Rule.php b/src/Composer/DependencyResolver/Rule.php
index d08c4a5ed..8af24094e 100644
--- a/src/Composer/DependencyResolver/Rule.php
+++ b/src/Composer/DependencyResolver/Rule.php
@@ -29,6 +29,8 @@ class Rule
     public $next1;
     public $next2;
 
+    public $ruleHash;
+
     public function __construct(array $literals, $reason, $reasonData)
     {
         // sort all packages ascending by id
@@ -85,7 +87,7 @@ class Rule
         }
 
         for ($i = 0, $n = count($this->literals); $i < $n; $i++) {
-            if (!$this->literals[$i]->getId() === $rule->literals[$i]->getId()) {
+            if ($this->literals[$i]->getId() !== $rule->literals[$i]->getId()) {
                 return false;
             }
         }
diff --git a/src/Composer/Downloader/VcsDownloader.php b/src/Composer/Downloader/VcsDownloader.php
index 4bcc79d0c..5fa8c9e4b 100644
--- a/src/Composer/Downloader/VcsDownloader.php
+++ b/src/Composer/Downloader/VcsDownloader.php
@@ -101,4 +101,4 @@ abstract class VcsDownloader implements DownloaderInterface
      * @throws \RuntimeException if the directory is not clean
      */
     abstract protected function enforceCleanDirectory($path);
-}
\ No newline at end of file
+}
diff --git a/tests/Composer/Test/DependencyResolver/PoolTest.php b/tests/Composer/Test/DependencyResolver/PoolTest.php
index c4dcb0bcc..643be0428 100644
--- a/tests/Composer/Test/DependencyResolver/PoolTest.php
+++ b/tests/Composer/Test/DependencyResolver/PoolTest.php
@@ -30,4 +30,65 @@ class PoolTest extends TestCase
         $this->assertEquals(array($package), $pool->whatProvides('foo'));
         $this->assertEquals(array($package), $pool->whatProvides('foo'));
     }
+
+    /**
+     * @expectedException \RuntimeException
+     */
+    public function testGetPriorityForNotRegisteredRepository()
+    {
+        $pool = new Pool;
+        $repository = new ArrayRepository;
+
+        $pool->getPriority($repository);
+    }
+
+    public function testGetPriorityWhenRepositoryIsRegistered()
+    {
+        $pool = new Pool;
+        $firstRepository = new ArrayRepository;
+        $pool->addRepository($firstRepository);
+        $secondRepository = new ArrayRepository;
+        $pool->addRepository($secondRepository);
+
+        $firstPriority = $pool->getPriority($firstRepository);
+        $secondPriority = $pool->getPriority($secondRepository);
+
+        $this->assertEquals(0, $firstPriority);
+        $this->assertEquals(1, $secondPriority);
+    }
+
+    public function testPackageById()
+    {
+        $pool = new Pool;
+        $repository = new ArrayRepository;
+        $package = $this->getPackage('foo', '1');
+
+        $repository->addPackage($package);
+        $pool->addRepository($repository);
+
+        $this->assertSame($package, $pool->packageById(1));
+    }
+
+    public function testWhatProvidesWhenPackageCannotBeFound()
+    {
+        $pool = new Pool;
+
+        $this->assertEquals(array(), $pool->whatProvides('foo'));
+    }
+
+    public function testGetMaxId()
+    {
+        $pool = new Pool;
+        $repository = new ArrayRepository;
+        $firstPackage = $this->getPackage('foo', '1');
+        $secondPackage = $this->getPackage('foo1', '1');
+
+        $this->assertEquals(0, $pool->getMaxId());
+
+        $repository->addPackage($firstPackage);
+        $repository->addPackage($secondPackage);
+        $pool->addRepository($repository);
+
+        $this->assertEquals(2, $pool->getMaxId());
+    }
 }
diff --git a/tests/Composer/Test/DependencyResolver/RuleSetIteratorTest.php b/tests/Composer/Test/DependencyResolver/RuleSetIteratorTest.php
index 2daa64eb6..6340a7f68 100644
--- a/tests/Composer/Test/DependencyResolver/RuleSetIteratorTest.php
+++ b/tests/Composer/Test/DependencyResolver/RuleSetIteratorTest.php
@@ -39,8 +39,7 @@ class ResultSetIteratorTest extends \PHPUnit_Framework_TestCase
         $ruleSetIterator = new RuleSetIterator($this->rules);
 
         $result = array();
-        foreach ($ruleSetIterator as $rule)
-        {
+        foreach ($ruleSetIterator as $rule) {
             $result[] = $rule;
         }
 
@@ -52,4 +51,22 @@ class ResultSetIteratorTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals($expected, $result);
     }
+
+    public function testKeys()
+    {
+        $ruleSetIterator = new RuleSetIterator($this->rules);
+
+        $result = array();
+        foreach ($ruleSetIterator as $key => $rule) {
+            $result[] = $key;
+        }
+
+        $expected = array(
+            RuleSet::TYPE_JOB,
+            RuleSet::TYPE_JOB,
+            RuleSet::TYPE_UPDATE,
+        );
+
+        $this->assertEquals($expected, $result);
+    }
 }
diff --git a/tests/Composer/Test/DependencyResolver/RuleSetTest.php b/tests/Composer/Test/DependencyResolver/RuleSetTest.php
index fa42d4522..be37b8795 100644
--- a/tests/Composer/Test/DependencyResolver/RuleSetTest.php
+++ b/tests/Composer/Test/DependencyResolver/RuleSetTest.php
@@ -14,8 +14,10 @@ namespace Composer\Test\DependencyResolver;
 
 use Composer\DependencyResolver\Rule;
 use Composer\DependencyResolver\RuleSet;
+use Composer\DependencyResolver\Literal;
+use Composer\Test\TestCase;
 
-class RuleSetTest extends \PHPUnit_Framework_TestCase
+class RuleSetTest extends TestCase
 {
     public function testAdd()
     {
@@ -41,4 +43,139 @@ class RuleSetTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals($rules, $ruleSet->getRules());
     }
+
+    /**
+     * @expectedException \OutOfBoundsException
+     */
+    public function testAddWhenTypeIsNotRecognized()
+    {
+        $ruleSet = new RuleSet;
+
+        $ruleSet->add(new Rule(array(), 'job1', null), 7);
+    }
+
+    public function testAddWhenTypeIsUnknow()
+    {
+        $ruleSet = new RuleSet;
+
+        $rule = new Rule(array(), 'job1', null);
+        $ruleSet->add($rule, -1);
+
+        $rules = $ruleSet->getRules();
+        $this->assertSame($rule, $rules[-1][0]);
+    }
+
+    public function testCount()
+    {
+        $ruleSet = new RuleSet;
+
+        $ruleSet->add(new Rule(array(), 'job1', null), RuleSet::TYPE_JOB);
+        $ruleSet->add(new Rule(array(), 'job2', null), RuleSet::TYPE_JOB);
+
+        $this->assertEquals(2, $ruleSet->count());
+    }
+
+    public function testRuleById()
+    {
+        $ruleSet = new RuleSet;
+
+        $rule = new Rule(array(), 'job1', null);
+        $ruleSet->add($rule, RuleSet::TYPE_JOB);
+
+        $this->assertSame($rule, $ruleSet->ruleById(0));
+    }
+
+    public function testGetIterator()
+    {
+        $ruleSet = new RuleSet;
+
+        $rule1 = new Rule(array(), 'job1', null);
+        $rule2 = new Rule(array(), 'job1', null);
+        $ruleSet->add($rule1, RuleSet::TYPE_JOB);
+        $ruleSet->add($rule2, RuleSet::TYPE_UPDATE);
+
+        $iterator = $ruleSet->getIterator();
+
+        $this->assertSame($rule1, $iterator->current());
+        $iterator->next();
+        $this->assertSame($rule2, $iterator->current());
+    }
+
+    public function testGetIteratorFor()
+    {
+        $ruleSet = new RuleSet;
+        $rule1 = new Rule(array(), 'job1', null);
+        $rule2 = new Rule(array(), 'job1', null);
+
+        $ruleSet->add($rule1, RuleSet::TYPE_JOB);
+        $ruleSet->add($rule2, RuleSet::TYPE_UPDATE);
+
+        $iterator = $ruleSet->getIteratorFor(RuleSet::TYPE_UPDATE);
+
+        $this->assertSame($rule2, $iterator->current());
+    }
+
+    public function testGetIteratorWithout()
+    {
+        $ruleSet = new RuleSet;
+        $rule1 = new Rule(array(), 'job1', null);
+        $rule2 = new Rule(array(), 'job1', null);
+
+        $ruleSet->add($rule1, RuleSet::TYPE_JOB);
+        $ruleSet->add($rule2, RuleSet::TYPE_UPDATE);
+
+        $iterator = $ruleSet->getIteratorWithout(RuleSet::TYPE_JOB);
+
+        $this->assertSame($rule2, $iterator->current());
+    }
+
+    public function testContainsEqual()
+    {
+        $ruleSet = new RuleSet;
+
+        $rule = $this->getRuleMock();
+        $rule->expects($this->any())
+            ->method('getHash')
+            ->will($this->returnValue('rule_1_hash'));
+        $rule->expects($this->any())
+            ->method('equals')
+            ->will($this->returnValue(true));
+
+        $rule2 = $this->getRuleMock();
+        $rule2->expects($this->any())
+            ->method('getHash')
+            ->will($this->returnValue('rule_2_hash'));
+
+        $rule3 = $this->getRuleMock();
+        $rule3->expects($this->any())
+            ->method('getHash')
+            ->will($this->returnValue('rule_1_hash'));
+        $rule3->expects($this->any())
+            ->method('equal')
+            ->will($this->returnValue(false));
+
+        $ruleSet->add($rule, RuleSet::TYPE_UPDATE);
+
+        $this->assertTrue($ruleSet->containsEqual($rule));
+        $this->assertFalse($ruleSet->containsEqual($rule2));
+        $this->assertFalse($ruleSet->containsEqual($rule3));
+    }
+
+    public function testToString()
+    {
+        $ruleSet = new RuleSet;
+        $literal = new Literal($this->getPackage('foo', '2.1'), true);
+        $rule = new Rule(array($literal), 'job1', null);
+
+        $ruleSet->add($rule, RuleSet::TYPE_UPDATE);
+
+        $this->assertContains('UPDATE  : (+foo-2.1.0.0)', $ruleSet->__toString());
+    }
+
+    private function getRuleMock()
+    {
+        return $this->getMockBuilder('Composer\DependencyResolver\Rule')
+            ->disableOriginalConstructor()
+            ->getMock();
+    }
 }
diff --git a/tests/Composer/Test/DependencyResolver/RuleTest.php b/tests/Composer/Test/DependencyResolver/RuleTest.php
new file mode 100644
index 000000000..f76f46eb1
--- /dev/null
+++ b/tests/Composer/Test/DependencyResolver/RuleTest.php
@@ -0,0 +1,170 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Test\DependencyResolver;
+
+use Composer\DependencyResolver\Rule;
+use Composer\DependencyResolver\Literal;
+use Composer\Test\TestCase;
+
+class RuleTest extends TestCase
+{
+    public function testGetHash()
+    {
+        $rule = new Rule(array(), 'job1', null);
+        $rule->ruleHash = '123';
+
+        $this->assertEquals('123', $rule->getHash());
+    }
+
+    public function testSetAndGetId()
+    {
+        $rule = new Rule(array(), 'job1', null);
+        $rule->setId(666);
+
+        $this->assertEquals(666, $rule->getId());
+    }
+
+    public function testEqualsForRulesWithDifferentHashes()
+    {
+        $rule = new Rule(array(), 'job1', null);
+        $rule->ruleHash = '123';
+
+        $rule2 = new Rule(array(), 'job1', null);
+        $rule2->ruleHash = '321';
+
+        $this->assertFalse($rule->equals($rule2));
+    }
+
+    public function testEqualsForRulesWithDifferentLiterals()
+    {
+        $literal = $this->getLiteralMock();
+        $literal->expects($this->any())
+            ->method('getId')
+            ->will($this->returnValue(1));
+        $rule = new Rule(array($literal), 'job1', null);
+        $rule->ruleHash = '123';
+
+        $literal = $this->getLiteralMock();
+        $literal->expects($this->any())
+            ->method('getId')
+            ->will($this->returnValue(12));
+        $rule2 = new Rule(array($literal), 'job1', null);
+        $rule2->ruleHash = '123';
+
+        $this->assertFalse($rule->equals($rule2));
+    }
+
+    public function testEqualsForRulesWithDifferLiteralsQuantity()
+    {
+        $literal = $this->getLiteralMock();
+        $literal->expects($this->any())
+            ->method('getId')
+            ->will($this->returnValue(1));
+        $literal2 = $this->getLiteralMock();
+        $literal2->expects($this->any())
+            ->method('getId')
+            ->will($this->returnValue(12));
+
+        $rule = new Rule(array($literal, $literal2), 'job1', null);
+        $rule->ruleHash = '123';
+        $rule2 = new Rule(array($literal), 'job1', null);
+        $rule2->ruleHash = '123';
+
+        $this->assertFalse($rule->equals($rule2));
+    }
+
+    public function testEqualsForRulesWithThisSameLiterals()
+    {
+        $literal = $this->getLiteralMock();
+        $literal->expects($this->any())
+            ->method('getId')
+            ->will($this->returnValue(1));
+        $literal2 = $this->getLiteralMock();
+        $literal2->expects($this->any())
+            ->method('getId')
+            ->will($this->returnValue(12));
+
+        $rule = new Rule(array($literal, $literal2), 'job1', null);
+        $rule2 = new Rule(array($literal, $literal2), 'job1', null);
+
+        $this->assertTrue($rule->equals($rule2));
+    }
+
+    public function testSetAndGetType()
+    {
+        $rule = new Rule(array(), 'job1', null);
+        $rule->setType('someType');
+
+        $this->assertEquals('someType', $rule->getType());
+    }
+
+    public function testEnable()
+    {
+        $rule = new Rule(array(), 'job1', null);
+        $rule->disable();
+        $rule->enable();
+
+        $this->assertTrue($rule->isEnabled());
+        $this->assertFalse($rule->isDisabled());
+    }
+
+    public function testDisable()
+    {
+        $rule = new Rule(array(), 'job1', null);
+        $rule->enable();
+        $rule->disable();
+
+        $this->assertTrue($rule->isDisabled());
+        $this->assertFalse($rule->isEnabled());
+    }
+
+    public function testSetWeak()
+    {
+        $rule = new Rule(array(), 'job1', null);
+        $rule->setWeak(true);
+
+        $rule2 = new Rule(array(), 'job1', null);
+        $rule2->setWeak(false);
+
+        $this->assertTrue($rule->isWeak());
+        $this->assertFalse($rule2->isWeak());
+    }
+
+    public function testIsAssertions()
+    {
+        $literal = $this->getLiteralMock();
+        $literal2 = $this->getLiteralMock();
+        $rule = new Rule(array($literal, $literal2), 'job1', null);
+        $rule2 = new Rule(array($literal), 'job1', null);
+
+        $this->assertFalse($rule->isAssertion());
+        $this->assertTrue($rule2->isAssertion());
+    }
+
+    public function testToString()
+    {
+        $literal = new Literal($this->getPackage('foo', '2.1'), true);
+        $literal2 = new Literal($this->getPackage('baz', '1.1'), false);
+
+        $rule = new Rule(array($literal, $literal2), 'job1', null);
+
+        $this->assertEquals('(-baz-1.1.0.0|+foo-2.1.0.0)', $rule->__toString());
+    }
+
+    private function getLiteralMock()
+    {
+        return $this->getMockBuilder('Composer\DependencyResolver\Literal')
+            ->disableOriginalConstructor()
+            ->getMock();
+    }
+}
diff --git a/tests/Composer/Test/Downloader/GitDownloaderTest.php b/tests/Composer/Test/Downloader/GitDownloaderTest.php
new file mode 100644
index 000000000..7d563d2e4
--- /dev/null
+++ b/tests/Composer/Test/Downloader/GitDownloaderTest.php
@@ -0,0 +1,111 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Test\Downloader;
+
+use Composer\Downloader\GitDownloader;
+
+class GitDownloaderTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testDownloadForPackageWithoutSourceReference()
+    {
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $packageMock->expects($this->once())
+            ->method('getSourceReference')
+            ->will($this->returnValue(null));
+
+        $downloader = new GitDownloader($this->getMock('Composer\IO\IOInterface'));
+        $downloader->download($packageMock, '/path');
+    }
+
+    public function testDownload()
+    {
+        $expectedGitCommand = 'git clone \'https://github.com/l3l0/composer\' \'composerPath\' && cd \'composerPath\' && git checkout \'ref\' && git reset --hard \'ref\'';
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $packageMock->expects($this->any())
+            ->method('getSourceReference')
+            ->will($this->returnValue('ref'));
+        $packageMock->expects($this->once())
+            ->method('getSourceUrl')
+            ->will($this->returnValue('https://github.com/l3l0/composer'));
+        $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
+        $processExecutor->expects($this->once())
+            ->method('execute')
+            ->with($this->equalTo($expectedGitCommand));
+
+        $downloader = new GitDownloader($this->getMock('Composer\IO\IOInterface'), $processExecutor);
+        $downloader->download($packageMock, 'composerPath');
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testUpdateforPackageWithoutSourceReference()
+    {
+        $initialPackageMock = $this->getMock('Composer\Package\PackageInterface');
+        $sourcePackageMock = $this->getMock('Composer\Package\PackageInterface');
+        $sourcePackageMock->expects($this->once())
+            ->method('getSourceReference')
+            ->will($this->returnValue(null));
+
+        $downloader = new GitDownloader($this->getMock('Composer\IO\IOInterface'));
+        $downloader->update($initialPackageMock, $sourcePackageMock, '/path');
+    }
+
+    public function testUpdate()
+    {
+        $expectedGitUpdateCommand = 'cd \'composerPath\' && git fetch && git checkout \'ref\' && git reset --hard \'ref\'';
+        $expectedGitResetCommand = 'cd \'composerPath\' && git status --porcelain';
+
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $packageMock->expects($this->any())
+            ->method('getSourceReference')
+            ->will($this->returnValue('ref'));
+        $packageMock->expects($this->any())
+            ->method('getSourceUrl')
+            ->will($this->returnValue('https://github.com/l3l0/composer'));
+        $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
+        $processExecutor->expects($this->at(0))
+            ->method('execute')
+            ->with($this->equalTo($expectedGitResetCommand));
+        $processExecutor->expects($this->at(1))
+            ->method('execute')
+            ->with($this->equalTo($expectedGitUpdateCommand));
+
+        $downloader = new GitDownloader($this->getMock('Composer\IO\IOInterface'), $processExecutor);
+        $downloader->update($packageMock, $packageMock, 'composerPath');
+    }
+
+    public function testRemove()
+    {
+        $expectedGitResetCommand = 'cd \'composerPath\' && git status --porcelain';
+
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
+        $processExecutor->expects($this->any())
+            ->method('execute')
+            ->with($this->equalTo($expectedGitResetCommand));
+
+        $downloader = new GitDownloader($this->getMock('Composer\IO\IOInterface'), $processExecutor);
+        $downloader->remove($packageMock, 'composerPath');
+    }
+
+    public function testGetInstallationSource()
+    {
+        $downloader = new GitDownloader($this->getMock('Composer\IO\IOInterface'));
+        
+        $this->assertEquals('source', $downloader->getInstallationSource());
+    }
+}
diff --git a/tests/Composer/Test/Downloader/HgDownloaderTest.php b/tests/Composer/Test/Downloader/HgDownloaderTest.php
new file mode 100644
index 000000000..81429194d
--- /dev/null
+++ b/tests/Composer/Test/Downloader/HgDownloaderTest.php
@@ -0,0 +1,111 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Test\Downloader;
+
+use Composer\Downloader\HgDownloader;
+
+class HgDownloaderTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testDownloadForPackageWithoutSourceReference()
+    {
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $packageMock->expects($this->once())
+            ->method('getSourceReference')
+            ->will($this->returnValue(null));
+
+        $downloader = new HgDownloader($this->getMock('Composer\IO\IOInterface'));
+        $downloader->download($packageMock, '/path');
+    }
+
+    public function testDownload()
+    {
+        $expectedGitCommand = 'hg clone \'https://mercurial.dev/l3l0/composer\' \'composerPath\' && cd \'composerPath\' && hg up \'ref\'';
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $packageMock->expects($this->any())
+            ->method('getSourceReference')
+            ->will($this->returnValue('ref'));
+        $packageMock->expects($this->once())
+            ->method('getSourceUrl')
+            ->will($this->returnValue('https://mercurial.dev/l3l0/composer'));
+        $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
+        $processExecutor->expects($this->once())
+            ->method('execute')
+            ->with($this->equalTo($expectedGitCommand));
+
+        $downloader = new HgDownloader($this->getMock('Composer\IO\IOInterface'), $processExecutor);
+        $downloader->download($packageMock, 'composerPath');
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testUpdateforPackageWithoutSourceReference()
+    {
+        $initialPackageMock = $this->getMock('Composer\Package\PackageInterface');
+        $sourcePackageMock = $this->getMock('Composer\Package\PackageInterface');
+        $sourcePackageMock->expects($this->once())
+            ->method('getSourceReference')
+            ->will($this->returnValue(null));
+
+        $downloader = new HgDownloader($this->getMock('Composer\IO\IOInterface'));
+        $downloader->update($initialPackageMock, $sourcePackageMock, '/path');
+    }
+
+    public function testUpdate()
+    {
+        $expectedUpdateCommand = 'cd \'composerPath\' && hg pull && hg up \'ref\'';
+        $expectedResetCommand = 'cd \'composerPath\' && hg st';
+
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $packageMock->expects($this->any())
+            ->method('getSourceReference')
+            ->will($this->returnValue('ref'));
+        $packageMock->expects($this->any())
+            ->method('getSourceUrl')
+            ->will($this->returnValue('https://github.com/l3l0/composer'));
+        $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
+        $processExecutor->expects($this->at(0))
+            ->method('execute')
+            ->with($this->equalTo($expectedResetCommand));
+        $processExecutor->expects($this->at(1))
+            ->method('execute')
+            ->with($this->equalTo($expectedUpdateCommand));
+
+        $downloader = new HgDownloader($this->getMock('Composer\IO\IOInterface'), $processExecutor);
+        $downloader->update($packageMock, $packageMock, 'composerPath');
+    }
+
+    public function testRemove()
+    {
+        $expectedResetCommand = 'cd \'composerPath\' && hg st';
+
+        $packageMock = $this->getMock('Composer\Package\PackageInterface');
+        $processExecutor = $this->getMock('Composer\Util\ProcessExecutor');
+        $processExecutor->expects($this->any())
+            ->method('execute')
+            ->with($this->equalTo($expectedResetCommand));
+
+        $downloader = new HgDownloader($this->getMock('Composer\IO\IOInterface'), $processExecutor);
+        $downloader->remove($packageMock, 'composerPath');
+    }
+
+    public function testGetInstallationSource()
+    {
+        $downloader = new HgDownloader($this->getMock('Composer\IO\IOInterface'));
+        
+        $this->assertEquals('source', $downloader->getInstallationSource());
+    }
+}
diff --git a/tests/Composer/Test/IO/ConsoleIOTest.php b/tests/Composer/Test/IO/ConsoleIOTest.php
new file mode 100644
index 000000000..78450eb53
--- /dev/null
+++ b/tests/Composer/Test/IO/ConsoleIOTest.php
@@ -0,0 +1,219 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Test\IO;
+
+use Composer\IO\ConsoleIO;
+use Composer\Test\TestCase;
+
+class ConsoleIOTest extends TestCase
+{
+    public function testIsInteractive()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $inputMock->expects($this->at(0))
+            ->method('isInteractive')
+            ->will($this->returnValue(true));
+        $inputMock->expects($this->at(1))
+            ->method('isInteractive')
+            ->will($this->returnValue(false));
+
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+
+        $this->assertTrue($consoleIO->isInteractive());
+        $this->assertFalse($consoleIO->isInteractive());
+    }
+
+    public function testWrite()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $outputMock->expects($this->once())
+            ->method('write')
+            ->with($this->equalTo('some information about something'), $this->equalTo(false));
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->write('some information about something', false);
+    }
+
+    public function testOverwrite()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $outputMock->expects($this->at(0))
+            ->method('write')
+            ->with($this->equalTo("\x08"), $this->equalTo(false));
+        $outputMock->expects($this->at(19))
+            ->method('write')
+            ->with($this->equalTo("\x08"), $this->equalTo(false));
+        $outputMock->expects($this->at(20))
+            ->method('write')
+            ->with($this->equalTo('some information'), $this->equalTo(false));
+        $outputMock->expects($this->at(21))
+            ->method('write')
+            ->with($this->equalTo(' '), $this->equalTo(false));
+        $outputMock->expects($this->at(24))
+            ->method('write')
+            ->with($this->equalTo(' '), $this->equalTo(false));
+        $outputMock->expects($this->at(25))
+            ->method('write')
+            ->with($this->equalTo("\x08"), $this->equalTo(false));
+        $outputMock->expects($this->at(28))
+            ->method('write')
+            ->with($this->equalTo("\x08"), $this->equalTo(false));
+        $outputMock->expects($this->at(29))
+            ->method('write')
+            ->with($this->equalTo(''));
+
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->overwrite('some information', true, 20);
+    }
+
+    public function testAsk()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $dialogMock = $this->getMock('Symfony\Component\Console\Helper\DialogHelper');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $dialogMock->expects($this->once())
+            ->method('ask')
+            ->with($this->isInstanceOf('Symfony\Component\Console\Output\OutputInterface'),
+                $this->equalTo('Why?'),
+                $this->equalTo('default'));
+        $helperMock->expects($this->once())
+            ->method('get')
+            ->with($this->equalTo('dialog'))
+            ->will($this->returnValue($dialogMock));
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->ask('Why?', 'default');
+    }
+
+    public function testAskConfirmation()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $dialogMock = $this->getMock('Symfony\Component\Console\Helper\DialogHelper');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $dialogMock->expects($this->once())
+            ->method('askConfirmation')
+            ->with($this->isInstanceOf('Symfony\Component\Console\Output\OutputInterface'),
+                $this->equalTo('Why?'),
+                $this->equalTo('default'));
+        $helperMock->expects($this->once())
+            ->method('get')
+            ->with($this->equalTo('dialog'))
+            ->will($this->returnValue($dialogMock));
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->askConfirmation('Why?', 'default');
+    }
+
+    public function testAskAndValidate()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $dialogMock = $this->getMock('Symfony\Component\Console\Helper\DialogHelper');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $dialogMock->expects($this->once())
+            ->method('askAndValidate')
+            ->with($this->isInstanceOf('Symfony\Component\Console\Output\OutputInterface'),
+                $this->equalTo('Why?'),
+                $this->equalTo('validator'),
+                $this->equalTo(10),
+                $this->equalTo('default'));
+        $helperMock->expects($this->once())
+            ->method('get')
+            ->with($this->equalTo('dialog'))
+            ->will($this->returnValue($dialogMock));
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->askAndValidate('Why?', 'validator', 10, 'default');
+    }
+
+    public function testSetAndGetAuthorization()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->setAuthorization('repoName', 'l3l0', 'passwd');
+
+        $this->assertEquals(
+            array('username' => 'l3l0', 'password' => 'passwd'),
+            $consoleIO->getAuthorization('repoName')
+        );
+    }
+
+    public function testGetAuthorizationWhenDidNotSet()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+
+        $this->assertEquals(
+            array('username' => null, 'password' => null),
+            $consoleIO->getAuthorization('repoName')
+        );
+    }
+
+    public function testHasAuthorization()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->setAuthorization('repoName', 'l3l0', 'passwd');
+
+        $this->assertTrue($consoleIO->hasAuthorization('repoName'));
+        $this->assertFalse($consoleIO->hasAuthorization('repoName2'));
+    }
+
+    public function testGetLastUsername()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->setAuthorization('repoName', 'l3l0', 'passwd');
+        $consoleIO->setAuthorization('repoName2', 'l3l02', 'passwd2');
+
+        $this->assertEquals('l3l02', $consoleIO->getLastUsername());
+    }
+
+    public function testGetLastPassword()
+    {
+        $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
+        $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
+        $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
+
+        $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
+        $consoleIO->setAuthorization('repoName', 'l3l0', 'passwd');
+        $consoleIO->setAuthorization('repoName2', 'l3l02', 'passwd2');
+
+        $this->assertEquals('passwd2', $consoleIO->getLastPassword());
+    }
+}