add a test in relation with LOGBACK-1582

Signed-off-by: Ceki Gulcu <ceki@qos.ch>

logback-classic/src/test/java/ch/qos/logback/classic/pattern/CompositeConverterTest.java

@@ -0,0 +1,62 @@
+/**
+ * Logback: the reliable, generic, fast and flexible logging framework.
+ * Copyright (C) 1999-2022, QOS.ch. All rights reserved.
+ *
+ * This program and the accompanying materials are dual-licensed under
+ * either the terms of the Eclipse Public License v1.0 as published by
+ * the Eclipse Foundation
+ *
+ *   or (per the licensee's choosing)
+ *
+ * under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation.
+ */
+package ch.qos.logback.classic.pattern;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.LoggerContext;
+import ch.qos.logback.classic.PatternLayout;
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.classic.spi.LoggingEvent;
+import ch.qos.logback.core.testUtil.StatusChecker;
+import ch.qos.logback.core.util.StatusPrinter;
+
+public class CompositeConverterTest {
+
+    private PatternLayout pl = new PatternLayout();
+    private LoggerContext lc = new LoggerContext();
+    Logger logger = lc.getLogger(this.getClass());
+    StatusChecker sc = new StatusChecker(lc);
+
+
+    @Before
+    public void setUp() {
+        pl.setContext(lc);
+    }
+
+    ILoggingEvent makeLoggingEvent(String msg, Exception ex) {
+        return new LoggingEvent(CompositeConverterTest.class.getName(), logger, Level.INFO, msg, ex, null);
+    }
+
+
+
+    @Test
+    public void testLogback1582() {
+        // EVAL_REF is searched within the context, if context is not set (== null), then
+        // a NullPointerException will be thrown
+        pl.setPattern("%m  %replace(%rootException{5, EVAL_REF}){'\\n', 'XYZ'}\"");
+        pl.start();
+        ILoggingEvent le = makeLoggingEvent("assert", new Exception("test"));
+
+        String result = pl.doLayout(le);
+        sc.assertIsErrorFree();
+        assertTrue(result.contains("XYZ"));
+    }
+
+}

logback-classic/src/test/java/ch/qos/logback/classic/pattern/EnsureExceptionHandlingTest.java

@@ -1,3 +1,16 @@
+/**
+ * Logback: the reliable, generic, fast and flexible logging framework.
+ * Copyright (C) 1999-2022, QOS.ch. All rights reserved.
+ *
+ * This program and the accompanying materials are dual-licensed under
+ * either the terms of the Eclipse Public License v1.0 as published by
+ * the Eclipse Foundation
+ *
+ *   or (per the licensee's choosing)
+ *
+ * under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation.
+ */
 package ch.qos.logback.classic.pattern;
 
 import org.junit.Before;