import junit.framework.TestCase;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
public class HelloWorldTest extends TestCase {
private static final String NL = System.lineSeparator();
public void testHelloWorld_NoCommandLineParamaters() {
assertEquals("Hello world!" + NL, callMainMethod(new String[]{}));
}
public void testHelloJeff() {
assertEquals("Hello Jeff!" + NL, callMainMethod(new String[]{"Jeff"}));
}
public void testHelloAlan() {
assertEquals("Hello Alan!" + NL, callMainMethod(new String[]{"Alan"}));
}
public void testHelloAlanHolub() {
assertEquals("Hello Alan Holub!" + NL, callMainMethod(new String[]{"Alan", "Holub"}));
}
public void test9parms() {
assertEquals(
"Hello 1 2 3 4 5 6 7 8 9!" + NL,
callMainMethod(new String[]{"1", "2", "3", "4", "5", "6", "7", "8", "9"}));
}
private static String callMainMethod(final String[] args) {
final var oldSystemOut = System.out;
final var outputStream = new ByteArrayOutputStream();
System.setOut(new PrintStream(outputStream));
try {
HelloWorld.main(args);
} finally {
System.setOut(oldSystemOut);
}
return outputStream.toString();
}
}
Comments
0 B
|👍
/👎
0 B
|👍
/👎
0 B
|👍
/👎