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POWhy do you write sample codes with main() and output instead of JUnit Tests
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  1. POWhy do you write sample codes with main() and output instead of JUnit Tests
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    copied!<p>I'm new to Stackoverflow and I wonder, why almost everybody writes samplecodes with a static main() and output like here in first answer: <a href="https://stackoverflow.com/questions/8006880/regex-to-fetch-only-key-value-pairs-and-omit-some-charaters">some ugly main</a></p> <p>from some ugly main:</p> <blockquote> <p>But what you posted looks like it's just a properties file. Try this:</p> <pre><code>import java.io.FileInputStream; import java.util.Properties; public class Main { public static void main(String[] args) throws Exception { Properties properties = new Properties(); properties.load(new FileInputStream("test.properties")); System.out.println(properties.getProperty("ReferenceDataLocation")); System.out.println(properties.getProperty("LicenseKey")); System.out.println(properties.getProperty("foo")); } } </code></pre> <p>which will print:</p> <pre><code>as al null </code></pre> </blockquote> <p>wouldn't it be nicer to write it as JUnit Test? It's easier to read. You can verify the result with just CTRL+C + CTRL-V + RunAs -> JUnit and see what is expected (or not).</p> <p>Am I wrong with this idea?</p> <p>I would write the main as this:</p> <pre><code>import static org.hamcrest.MatcherAssert.*; import static org.hamcrest.Matchers.*; import java.io.ByteArrayInputStream; import java.util.Properties; import org.junit.Test; public class TestSomeInputStreamAsProperties { String someFileAsString = "ReferenceDataLocation = as\n"+ " \n" + " \n" + " ##############################################################################\n" + " #\n" + " # LicenseKey\n" + " # Address Doctor License\n" + " #\n" + " ##############################################################################\n" + " LicenseKey = al\n"; @Test public void whenReadingFromSomeInputStreamWeShouldGetProperties() throws Exception { // Arrange Properties properties = new Properties(); // Act properties.load(new ByteArrayInputStream(someFileAsString.getBytes())); // Assert assertThat(properties.getProperty("ReferenceDataLocation"), is("as")); assertThat(properties.getProperty("LicenseKey"), is("al")); assertThat(properties.getProperty("foo"), is(nullValue())); } } </code></pre> <p><strong>The question is: why would I write a sample with main() and output? why don't users try to get on the JUnit train and start writing tests to verify their code?</strong></p> <p>+</p> <p><strong>Another Question: why don't people post their problems as JUnit tests?</strong></p> <p>I'm kinda disappointed. </p> <p><strong>EDIT</strong>: - don't get me wrong about this. It's just expectations > reality ;) I think stackoverflow is still a great site and I will write here all my problems and try to help others to solve theirs. I thought, JUnit is more spread and it would be appreciated by your community to focus on solving problems with JUnit.</p> <p>Instead I realise that it is not wanted. Wouldn't you be disappointed too?</p>
 

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