SystemOutRule, SystemErrRule: Handle new line characters

In Linux, new line is treated as \n, whereas in Windows new line is treated as \r\n. Since new line character is different in different operating systems, we need a better way to handle this.

 

If you have new lines in the text, then use ‘getLogWithNormalizedLineSeparator’ method, it replace new line characters with \n.

 

Example

assertEquals(msg, systemErrRule.getLogWithNormalizedLineSeparator());
assertEquals(msg, systemOutRule.getLogWithNormalizedLineSeparator());

 

Find the below working application.

 

SystemOutErrNewLineCharTest.java

package com.sample.app.tests;

import static org.junit.Assert.assertEquals;

import org.junit.Rule;
import org.junit.Test;
import org.junit.contrib.java.lang.system.SystemErrRule;
import org.junit.contrib.java.lang.system.SystemOutRule;

public class SystemOutErrNewLineCharTest {
	@Rule
	public final SystemErrRule systemErrRule = new SystemErrRule().enableLog();

	@Rule
	public final SystemOutRule systemOutRule = new SystemOutRule().enableLog();

	@Test
	public void newLineText() {
		String msg = "Hello\nHow\nAre\tYou\n";

		System.err.print(msg);
		System.out.print(msg);

		assertEquals(msg, systemErrRule.getLogWithNormalizedLineSeparator());
		assertEquals(msg, systemOutRule.getLogWithNormalizedLineSeparator());
	}
}

 

You can download complete working application from this link.

https://github.com/harikrishna553/system-rules

 

 

 

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