Change TestScaleHelper.setState/restoreState to @BeforeClass/@AfterClass

platform/platform-tests/testSrc/com/intellij/ui/uiTestUtil.kt

@@ -32,14 +32,12 @@ import javax.swing.plaf.metal.MetalLookAndFeel
 internal val isUpdateSnapshotsGlobal by lazy { SystemPropertyUtil.getBoolean("test.update.snapshots", false) }
 
 class NoScaleRule : ExternalResource() {
-  private var scaleHelper = TestScaleHelper()
-
   override fun before() {
-    scaleHelper.setState()
+    TestScaleHelper.setState()
   }
 
   override fun after() {
-    scaleHelper.restoreState()
+    TestScaleHelper.restoreState()
   }
 }
 

platform/platform-tests/testSrc/com/intellij/util/ui/IconScaleTest.java

@@ -7,7 +7,7 @@ import com.intellij.testFramework.PlatformTestUtil;
 import com.intellij.util.IconUtil;
 import com.intellij.util.ui.JBUI.ScaleContext;
 import junit.framework.TestCase;
-import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.Test;
 
 import javax.swing.*;
@@ -22,11 +22,11 @@ import static com.intellij.util.ui.JBUI.ScaleType.USR_SCALE;
  *
  * @author tav
  */
+@SuppressWarnings("MethodOverridesStaticMethodOfSuperclass")
 public class IconScaleTest extends TestScaleHelper {
-  @Before
-  @Override
-  public void setState() {
-    super.setState();
+  @BeforeClass
+  public static void setState() {
+    TestScaleHelper.setState();
     setRegistryProperty("ide.svg.icon", "true");
   }
 
@@ -79,7 +79,7 @@ public class IconScaleTest extends TestScaleHelper {
     TestCase.assertEquals("unexpected scaled icon real height", ICON_SCALED_REAL_SIZE, ImageUtil.getRealHeight(IconUtil.toImage(scaledIcon)));
   }
 
-  private String getIconPath() {
+  private static String getIconPath() {
     return PlatformTestUtil.getPlatformTestDataPath() + "ui/abstractClass.svg";
   }
 }

platform/platform-tests/testSrc/com/intellij/util/ui/SvgIconPaintTest.java

@@ -7,7 +7,7 @@ import com.intellij.util.IconUtil;
 import com.intellij.util.ui.JBUI.ScaleContext;
 import com.intellij.util.ui.paint.ImageComparator;
 import com.intellij.util.ui.paint.ImageComparator.AASmootherComparator;
-import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.Test;
 
 import java.awt.*;
@@ -22,11 +22,11 @@ import static com.intellij.util.ui.JBUI.ScaleType.SYS_SCALE;
  *
  * @author tav
  */
+@SuppressWarnings("MethodOverridesStaticMethodOfSuperclass")
 public class SvgIconPaintTest extends TestScaleHelper {
-  @Before
-  @Override
-  public void setState() {
-    super.setState();
+  @BeforeClass
+  public static void setState() {
+    TestScaleHelper.setState();
     setRegistryProperty("ide.svg.icon", "true");
   }
 

platform/platform-tests/testSrc/com/intellij/util/ui/TestScaleHelper.java

@@ -9,9 +9,7 @@ import com.intellij.util.SystemProperties;
 import com.intellij.util.ui.JBUI.ScaleContext;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.junit.After;
-import org.junit.Assume;
-import org.junit.Before;
+import org.junit.*;
 
 import java.awt.*;
 import java.awt.image.BufferedImage;
@@ -30,17 +28,17 @@ public class TestScaleHelper {
   private static final Map<String, String> originalSysProps = new HashMap<>();
   private static final Map<String, String> originalRegProps = new HashMap<>();
 
-  private float originalUserScale;
-  private boolean originalJreHiDPIEnabled;
+  private static float originalUserScale;
+  private static boolean originalJreHiDPIEnabled;
 
-  @Before
-  public void setState() {
+  @BeforeClass
+  public static void setState() {
     originalUserScale = JBUI.scale(1f);
     originalJreHiDPIEnabled = UIUtil.isJreHiDPIEnabled();
   }
 
-  @After
-  public void restoreState() {
+  @AfterClass
+  public static void restoreState() {
     JBUI.setUserScaleFactor(originalUserScale);
     overrideJreHiDPIEnabled(originalJreHiDPIEnabled);
     restoreRegistryProperties();