MAGETWO-33157: Conflict restriction checking is missing version checking in enable/disable module CLI

- added unit test

Author: eddielau

dev/tests/unit/testsuite/Magento/Framework/Module/PackageInfoTest.php

@@ -32,10 +32,10 @@ public function setUp()
 
         $composerData = [
             'A' => '{"name":"a", "require":{"b":"0.1"}, "conflict":{"c":"0.1"}, "version":"0.1"}',
-            'B' => '{"name":"b", "require":{"d":"0.1"}, "version":"0.1"}',
+            'B' => '{"name":"b", "require":{"d":"0.3"}, "version":"0.2"}',
             'C' => '{"name":"c", "require":{"e":"0.1"}, "version":"0.1"}',
-            'D' => '{"name":"d", "conflict":{"c":"0.1"}, "version":"0.1"}',
-            'E' => '{"name":"e", "version":"0.1"}',
+            'D' => '{"name":"d", "conflict":{"c":"0.1"}, "version":"0.3"}',
+            'E' => '{"name":"e", "version":"0.4"}',
         ];
         $fileIteratorMock = $this->getMock('Magento\Framework\Config\FileIterator', [], [], '', false);
         $fileIteratorMock->expects($this->once())
@@ -92,4 +92,13 @@ public function testGetConflictReturnPackageName()
         $this->assertEquals(['c' => '0.1'], $this->packageInfo->getConflict('D', false));
         $this->assertEquals([], $this->packageInfo->getConflict('E', false));
     }
+
+    public function testGetVersion()
+    {
+        $this->assertEquals('0.1', $this->packageInfo->getVersion('A'));
+        $this->assertEquals('0.2', $this->packageInfo->getVersion('B'));
+        $this->assertEquals('0.1', $this->packageInfo->getVersion('C'));
+        $this->assertEquals('0.3', $this->packageInfo->getVersion('D'));
+        $this->assertEquals('0.4', $this->packageInfo->getVersion('E'));
+    }
 }