OZG-6754 KOP-2674 abgabe0401: Add test with unknown and remote schemas

src/test/java/de/ozgcloud/xta/client/extension/Patch.java

@@ -23,9 +23,11 @@ public record Patch(
 		var patchedContent = new StringBuilder();
 		try {
 			for (var hunk : hunks) {
-				for (var patchedLine : hunk.apply(lines, lineOffset)) {
-					patchedContent.append(patchedLine).append("\n");
+				var patchResult = hunk.apply(lines, lineOffset);
+				for (var patchLine : patchResult.lines()) {
+					patchedContent.append(patchLine).append("\n");
 				}
+				lineOffset = patchResult.lineOffset();
 			}
 			lines.forEachRemaining(patchedContent::append);
 		} catch (TechnicalException exception) {

src/test/java/de/ozgcloud/xta/client/extension/PatchHunk.java

@@ -11,14 +11,21 @@ public record PatchHunk(
 		List<HunkLine> hunkLines
 ) {
 
-	public List<String> apply(Iterator<String> lines, int lineOffset) {
+	public record PatchResult(
+			List<String> lines,
+			int lineOffset
+	) {
+	}
+
+	public PatchResult apply(Iterator<String> lines, int lineOffset) {
 		var patchedLines = new ArrayList<String>();
-		skipToContextStart(lines, lineOffset, patchedLines);
+		lineOffset = skipToContextStart(lines, lineOffset, patchedLines);
 
 		for (var hunkLine : hunkLines) {
 			switch (hunkLine.operation) {
 				case CONTEXT -> {
 					var contextLine = lines.next();
+					lineOffset++;
 					if (!hunkLine.line.equals(contextLine)) {
 						throw new TechnicalException(
 								"Unexpected context line! expected='" + hunkLine.line + "' actual='" + contextLine + "', lineOffset=" + lineOffset);
@@ -28,6 +35,7 @@ public record PatchHunk(
 				case ADD -> patchedLines.add(hunkLine.line);
 				case REMOVE -> {
 					var removeLine = lines.next();
+					lineOffset++;
 					if (!hunkLine.line.equals(removeLine)) {
 						throw new TechnicalException(
 								"Unexpected remove line! expected='" + hunkLine.line + "' actual='" + removeLine + "', lineOffset=" + lineOffset);
@@ -35,16 +43,17 @@ public record PatchHunk(
 				}
 			}
 		}
-		return patchedLines;
+		return new PatchResult(patchedLines, lineOffset);
 	}
 
-	private void skipToContextStart(Iterator<String> lines, int lineOffset, List<String> patchedLines) {
+	private int skipToContextStart(Iterator<String> lines, int lineOffset, List<String> patchedLines) {
 		for (; lineOffset < contextStartLineNumber - 1; lineOffset++) {
 			if (!lines.hasNext()) {
 				throw new TechnicalException("Unexpected end of target file! lineOffset=" + lineOffset);
 			}
 			patchedLines.add(lines.next());
 		}
+		return lineOffset;
 	}
 
 	public record HunkLine(

src/test/java/de/ozgcloud/xta/client/xdomea/XdomeaXtaMessageCreatorITCase.java

@@ -117,6 +117,18 @@ class XdomeaXtaMessageCreatorITCase {
 					.isInstanceOf(ClientException.class);
 		}
 
+		@DisplayName("should not throw with valid message 0401")
+		@Test
+		void shouldNotThrowWithValidMessage0401() {
+			var validMessageZipFile = loadMessageFileWithPatch(
+					"abgabe0401-kleiner-waffenschein",
+					"valid-unknown-namespaces.patch"
+			);
+
+			assertThatCode(() -> creator.createMessage(validMessageZipFile))
+					.doesNotThrowAnyException();
+		}
+
 	}
 
 	private XtaMessageExampleLoader.MessageExampleConfig.MessageExampleConfigBuilder createExampleConfigBuilder() {