mobile/bind/java/SeqTest.java

package go;

import android.test.suitebuilder.annotation.Suppress;

import go.testpkg.Testpkg;

import junit.framework.TestCase;

public class SeqTest extends TestCase {
  static {
    Go.init(null);
  }

  public void testAdd() {
    long res = Testpkg.Add(3, 4);
    assertEquals("Unexpected arithmetic failure", 7, res);
  }

  public void testShortString() {
    String want = "a short string";
    String got = Testpkg.StrDup(want);
    assertEquals("Strings should match", want, got);
  }

  public void testLongString() {
    StringBuilder b = new StringBuilder();
    for (int i = 0; i < 128*1024; i++) {
      b.append("0123456789");
    }
    String want = b.toString();
    String got = Testpkg.StrDup(want);
    assertEquals("Strings should match", want, got);
  }

  public void testUnicode() {
    String want = "Hello, 世界";
    String got = Testpkg.StrDup(want);
    assertEquals("Strings should match", want, got);
  }

  public void testGoRefGC() {
    Testpkg.S s = Testpkg.New();
    runGC();
    long collected = Testpkg.NumSCollected();
    assertEquals("Only S should be pinned", 0, collected);

    s = null;
    runGC();
    collected = Testpkg.NumSCollected();
    assertEquals("S should be collected", 1, collected);
  }

  boolean finalizedAnI;

  private class AnI extends Testpkg.I.Stub {
    boolean called;
    public void F() {
      called = true;
    }
    @Override
    public void finalize() throws Throwable {
      finalizedAnI = true;
      super.finalize();
    }
  }

  /* Suppress this test for now; it's flaky or broken. */
  @Suppress
  public void testJavaRefGC() {
    finalizedAnI = false;
    AnI obj = new AnI();
    runGC();
    Testpkg.Call(obj);
    assertTrue("want F to be called", obj.called);
    obj = null;
    runGC();
    assertTrue("want obj to be collected", finalizedAnI);
  }

  public void testJavaRefKeep() {
    finalizedAnI = false;
    AnI obj = new AnI();
    Testpkg.Keep(obj);
    obj = null;
    runGC();
    assertFalse("want obj to be kept live by Go", finalizedAnI);
  }

  private void runGC() {
    System.gc();
    System.runFinalization();
    Testpkg.GC();
    System.gc();
    System.runFinalization();
  }
}