Change test storage from List to class in Fix plugin

What's done:
* Change test storage from List to class in plugin
Closes #221

save-plugins/fix-plugin/src/commonNonJsTest/kotlin/org/cqfn/save/plugins/fix/FixPluginTest.kt

@@ -39,8 +39,8 @@ class FixPluginTest {
  val pairs = discoverFilePairs()
 
  assertEquals(1, pairs.size)
- assertEquals("Test1Expected.java", pairs.single().first.name)
- assertEquals("Test1Test.java", pairs.single().second.name)
+ assertEquals("Test1Test.java", pairs.single().first.name)
+ assertEquals("Test1Expected.java", pairs.single().second.name)
  }
 
  @Test
@@ -59,8 +59,8 @@ class FixPluginTest {
  val pairs = discoverFilePairs()
 
  assertEquals(1, pairs.size)
- assertEquals("Test2Expected.java", pairs.single().first.name)
- assertEquals("Test2Test.java", pairs.single().second.name)
+ assertEquals("Test2Test.java", pairs.single().first.name)
+ assertEquals("Test2Expected.java", pairs.single().second.name)
  }
 
  @Test
@@ -89,7 +89,7 @@ class FixPluginTest {
  ).execute()
 
  assertEquals(1, results.count(), "Size of results should equal number of pairs")
- assertEquals(TestResult(listOf(expectedFile, testFile), Pass(null),
+ assertEquals(TestResult(listOf(testFile, expectedFile), Pass(null),
  DebugInfo(results.single().debugInfo?.stdout, results.single().debugInfo?.stderr, null)), results.single())
  val tmpDir = (FileSystem.SYSTEM_TEMPORARY_DIRECTORY / FixPlugin::class.simpleName!!)
  assertTrue("Files should be identical") {