Project_Coin_Test.java

package bsh;

import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.concurrent.atomic.AtomicBoolean;

import static bsh.TestUtil.eval;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

@RunWith(FilteredTestRunner.class)
public class Project_Coin_Test {


	@Test
	@Category(ProjectCoinFeature.class)
	public void integer_literal_enhancements() throws Exception {
		final Interpreter interpreter = new Interpreter();
		assertEquals("0x99", 153, interpreter.eval("return 0x99;"));
		assertEquals("0231", 153, interpreter.eval("return 0231;"));
		assertEquals("0b10011001", 153, interpreter.eval("return 0b10011001;"));
		assertEquals("0b_1001_1001", 153, interpreter.eval("return 0b_1001_1001;"));
		assertEquals("0x_9_9", 153, interpreter.eval("return 0x_9_9;"));
		assertEquals("15_500_000_000L", 15500000000L, interpreter.eval("return 15_500_000_000L;"));
	}


	@Test
	@Category(ProjectCoinFeature.class)
	public void diamond_operator() throws Exception {
		eval("List<String> list = new ArrayList<>()");
		final Object anagrams = eval(
				"Map<String, List<String>> anagrams = new HashMap<>();" +
				"return anagrams;");
		assertNotNull(anagrams);
		assertTrue(anagrams.getClass().getName(), anagrams instanceof HashMap);
	}


	@SuppressWarnings({"JUnitTestMethodWithNoAssertions"})
	@Test
	@Category(Project_Coin_Test.class)
	public void try_with_resource_parsing() throws Exception {
		eval(
				"try (ByteArrayOutputStream x = new ByteArrayOutputStream()) {",
				"} catch (Exception e) {",
				"}\n"
		);
		eval(
				"try (ByteArrayOutputStream x = new ByteArrayOutputStream(); ByteArrayOutputStream y = new ByteArrayOutputStream()) {",
				"} catch (Exception e) {",
				"}\n"
		);
		eval(
				"try (x = new ByteArrayOutputStream(); y = new ByteArrayOutputStream()) {",
				"} catch (Exception e) {",
				"}\n"
		);
	}


	@Test
	@Category(Project_Coin_Test.class)
	public void try_with_resource() throws Exception {
		final Interpreter interpreter = new Interpreter();
		final AtomicBoolean closed = new AtomicBoolean(false);
		final IOException fromWrite = new IOException("exception from write");
		final IOException fromClose = new IOException("exception from close");
		final OutputStream autoclosable = new OutputStream() {

			@Override
			public void write(final int b) throws IOException {
				throw fromWrite;
			}


			@Override
			public void close() throws IOException {
				closed.set(true);
				throw fromClose;
			}
		};
		try {
			interpreter.set("autoclosable", autoclosable);
			interpreter.eval(
					"try (x = new BufferedOutputStream(autoclosable)) {\n" +
					"	x.write(42);\n" +
					"} catch (Exception e) {\n" +
					"	thrownException = e;\n" +
					"}\n"
			);
			fail("expected exception");
		} catch (final EvalError evalError) {
			if (evalError instanceof ParseException) {
				throw evalError;
			}
			final Throwable e = evalError.getCause();
			assertSame(fromWrite, e);
			interpreter.set("exception", e);
			final Object suppressed = interpreter.eval("return exception.getSuppressed();"); // avoid java 7 syntax in java code ;)
			assertSame(fromClose, suppressed);
		}
		assertTrue("stream should be closed", closed.get());
	}


	@Test
	@Category(Project_Coin_Test.class)
	public void switch_on_strings() throws Exception {
		final Object result = eval(
					"switch(\"hurz\") {\n",
					"	case \"bla\": return 1;",
					"	case \"foo\": return 2;",
					"	case \"hurz\": return 3;",
					"	case \"igss\": return 4;",
					"	default: return 5;",
					"}\n");
		assertEquals(result, 3);
	}

}