Add a test to verify that the console log pattern can be overridden

See gh-5867

spring-boot/src/test/java/org/springframework/boot/logging/logback/LogbackConfigurationTests.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.logging.logback;
+
+import java.io.File;
+
+import ch.qos.logback.classic.LoggerContext;
+import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
+import ch.qos.logback.classic.joran.JoranConfigurator;
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.Appender;
+import ch.qos.logback.core.ConsoleAppender;
+import ch.qos.logback.core.encoder.Encoder;
+import ch.qos.logback.core.joran.spi.JoranException;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for default Logback configuration provided by {@code base.xml}.
+ *
+ * @author Andy Wilkinson
+ */
+public class LogbackConfigurationTests {
+
+	@Test
+	public void consolePatternCanBeOverridden() throws JoranException {
+		JoranConfigurator configurator = new JoranConfigurator();
+		LoggerContext context = new LoggerContext();
+		configurator.setContext(context);
+		configurator.doConfigure(
+				new File("src/test/resources/custom-console-log-pattern.xml"));
+		Appender<ILoggingEvent> appender = context.getLogger("ROOT")
+				.getAppender("CONSOLE");
+		assertThat(appender).isInstanceOf(ConsoleAppender.class);
+		Encoder<?> encoder = ((ConsoleAppender<?>) appender).getEncoder();
+		assertThat(encoder).isInstanceOf(PatternLayoutEncoder.class);
+		assertThat(((PatternLayoutEncoder) encoder).getPattern()).isEqualTo("foo");
+	}
+
+}

spring-boot/src/test/resources/custom-console-log-pattern.xml

@@ -0,0 +1,4 @@
+<configuration>
+	<property name="CONSOLE_LOG_PATTERN" value="foo" />
+    <include resource="org/springframework/boot/logging/logback/base.xml" />
+</configuration>