MAGETWO-63450: Create integration tests for ThemeProvider

- refactoring

Author: Igor Melnikov

dev/tests/integration/testsuite/Magento/Theme/Model/Theme/ThemeProviderTest.php

@@ -40,7 +40,7 @@ public function testGetThemeById()
     {
         /** @var Theme $theme */
         foreach ($this->themeCollection as $theme) {
-            $this->assertEquals(
+            $this->assertSame(
                 $this->themeProvider1->getThemeById($theme->getId())->getData(),
                 $this->themeProvider2->getThemeById($theme->getId())->getData()
             );
@@ -51,7 +51,7 @@ public function testGetThemeByFullPath()
     {
         /** @var Theme $theme */
         foreach ($this->themeCollection as $theme) {
-            $this->assertEquals(
+            $this->assertSame(
                 $this->themeProvider1->getThemeByFullPath($theme->getFullPath())->getData(),
                 $this->themeProvider2->getThemeByFullPath($theme->getFullPath())->getData()
             );