Merge branch 'master' into feature/optional_tags_for_modifiers

src/main/java/de/tum/in/test/api/internal/sanitization/AssertionFailedErrorSanitizer.java

@@ -24,8 +24,13 @@ public Throwable sanitize(Throwable t, MessageTransformer messageTransformer) {
 		ValueWrapper actual = afe.getActual();
 		ThrowableInfo info = ThrowableInfo.getEssentialInfosSafeFrom(t).sanitize();
 		String newMessage = messageTransformer.apply(info);
-		AssertionFailedError newAfe = new AssertionFailedError(newMessage, sanitizeValue(expected),
-				sanitizeValue(actual));
+		AssertionFailedError newAfe;
+		// If both expected and actual are null, this cannot arise from assertEquals,
+		// and thus afe was constructed only by providing a message (and cause)
+		if (expected == null && actual == null)
+			newAfe = new AssertionFailedError(newMessage);
+		else
+			newAfe = new AssertionFailedError(newMessage, sanitizeValue(expected), sanitizeValue(actual));
 		SanitizationUtils.copyThrowableInfoSafe(info, newAfe);
 		return newAfe;
 	}

src/test/java/de/tum/in/test/api/ExceptionFailureTest.java

@@ -1,6 +1,5 @@
 package de.tum.in.test.api;
 
-import static de.tum.in.test.testutilities.CustomConditions.testFailedWith;
 import static org.junit.platform.testkit.engine.EventConditions.*;
 import static org.junit.platform.testkit.engine.TestExecutionResultConditions.*;
 
@@ -53,7 +52,11 @@ void test_assertJMultipleFailures() {
 	@TestTest
 	void test_assertionFailOnly() {
 		tests.assertThatEvents().haveExactly(1,
-				testFailedWith(assertionFailOnly, AssertionFailedError.class, "This test failed. Penguin."));
+				event(test(assertionFailOnly), finishedWithFailure(instanceOf(AssertionFailedError.class),
+						message("This test failed. Penguin."), new Condition<>(t -> {
+							var afe = (AssertionFailedError) t;
+							return afe.getActual() == null && afe.getExpected() == null;
+						}, "expected and actual are both null"))));
 	}
 
 	@TestTest