openjdk8-jtreg-testng-example

# Assuming you already have jtreg.jar in ~/jtreg/lib/ ...
# I believe TestNG needs jcommander.jar which is missing from some jtreg distributions?
export PATH=$PATH:~/jtreg/linux/bin
cd ~/jtreg/lib/
wget http://repo1.maven.org/maven2/com/beust/jcommander/1.7/jcommander-1.7.jar

# Now we can make our new test
cd ~
mkdir -p ~/tests/practice
cd ~/tests/practices
echo > TEST.ROOT
vi HashMapTest.java
# Create TestNG test for new HashMap(-1) ...
# START TEST CODE
import org.testng.*;
import org.testng.annotations.*;

/**
 * @test
 * @run testng HashMapTest
 * @summary Initialising a HashMap with negative integer should throw IllegalArguementException
 */
public class HashMapTest {
	@Test
	public void shouldThrowIllegalArguementExceptionForNegativeHashMapSize() {
		try {
			new java.util.HashMap(-1);
			throw new RuntimeException("Fail - expected IllegalArguementException");
		} catch (IllegalArgumentException iae) {
			// Expected
		}
	}
}
# END TEST CODE

# Now we can finally run our test!

jtreg -verbose:all -cpa:/home/openjdk/jtreg/lib/jcommander-1.7.jar -testjdk:/home/openjdk/sources/jdk8_tl/build/linux-x86_64-normal-server-release/images/j2sdk-image/ HashMapTest.java