assertThat(Element)

platform/testFramework/src/com/intellij/testFramework/PlatformTestUtil.java

@@ -846,7 +846,7 @@ public class PlatformTestUtil {
 
   public static void assertElementsEqual(final Element expected, final Element actual) throws IOException {
     if (!JDOMUtil.areElementsEqual(expected, actual)) {
-      Assert.assertEquals(printElement(expected), printElement(actual));
+      Assert.assertEquals(JDOMUtil.writeElement(expected), JDOMUtil.writeElement(actual));
     }
   }
 
@@ -859,12 +859,6 @@ public class PlatformTestUtil {
     }
   }
 
-  public static String printElement(final Element element) throws IOException {
-    final StringWriter writer = new StringWriter();
-    JDOMUtil.writeElement(element, writer, "\n");
-    return writer.getBuffer().toString();
-  }
-
   public static String getCommunityPath() {
     final String homePath = PathManager.getHomePath();
     if (new File(homePath, "community/.idea").isDirectory()) {
@@ -877,7 +871,6 @@ public class PlatformTestUtil {
     return getCommunityPath().replace(File.separatorChar, '/') + "/platform/platform-tests/testData/";
   }
 
-
   public static Comparator<AbstractTreeNode> createComparator(final Queryable.PrintInfo printInfo) {
     return (o1, o2) -> {
       String displayText1 = o1.toTestString(printInfo);

platform/testFramework/testFramework.iml

@@ -25,7 +25,7 @@
     <orderEntry type="module" module-name="images" exported="" scope="RUNTIME" />
     <orderEntry type="module" module-name="RegExpSupport" exported="" scope="RUNTIME" />
     <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
-    <orderEntry type="library" scope="TEST" name="assertJ" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="assertJ" level="project" />
     <orderEntry type="library" scope="TEST" name="memoryfilesystem" level="project" />
     <orderEntry type="module" module-name="boot" />
   </component>

platform/testFramework/testSrc/com/intellij/testFramework/assertJEx.kt

@@ -24,6 +24,7 @@ import org.assertj.core.api.AbstractAssert
 import org.assertj.core.api.PathAssert
 import org.assertj.core.internal.Objects
 import org.jdom.Element
+import java.io.File
 import java.nio.file.Files
 import java.nio.file.LinkOption
 import java.nio.file.Path
@@ -39,10 +40,14 @@ class JdomAssert(actual: Element?) : AbstractAssert<JdomAssert, Element?>(actual
     return this
   }
 
+  fun isEqualTo(file: File): JdomAssert {
+    return isEqualTo(file.readText())
+  }
+
   fun isEqualTo(expected: String): JdomAssert {
     isNotNull
 
-    Objects.instance().assertEqual(info, JDOMUtil.writeElement(actual!!), expected.trimIndent())
+    Objects.instance().assertEqual(info, JDOMUtil.writeElement(actual!!), expected.trimIndent().removePrefix("""<?xml version="1.0" encoding="UTF-8"?>""").trimStart())
     return this
   }
 }

plugins/eclipse/testSources/org/jetbrains/idea/eclipse/EclipseImlTest.java

@@ -40,13 +40,14 @@ import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.vfs.LocalFileSystem;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.testFramework.IdeaTestCase;
-import com.intellij.testFramework.PlatformTestUtil;
 import org.jdom.Element;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.idea.eclipse.conversion.EclipseClasspathReader;
 
 import java.io.File;
 
+import static com.intellij.testFramework.Assertions.assertThat;
+
 public class EclipseImlTest extends IdeaTestCase {
   @NonNls private static final String JUNIT = "JUNIT";
 
@@ -100,11 +101,9 @@ public class EclipseImlTest extends IdeaTestCase {
     PathMacroManager.getInstance(project).collapsePaths(actualImlElement);
     PathMacros.getInstance().removeMacro(JUNIT);
 
-    Element expectedIml = JDOMUtil.load(new File(project.getBaseDir().getPath() + "/expected", "expected.iml"));
-    PlatformTestUtil.assertElementsEqual(expectedIml, actualImlElement);
+    assertThat(actualImlElement).isEqualTo(FileUtil.loadFile(new File(project.getBaseDir().getPath() + "/expected", "expected.iml")));
   }
 
-
   public void testWorkspaceOnly() throws Exception {
     doTest();
   }