コード例 #1
0
  @Test
  public void testAddConstant() {
    final DependencyBuilder<String> db = new DependencyBuilder<String>();
    try {
      db.addConstant(null, DI.constantly("", String.class));
      fail("null key should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }
    // null value should work fine
    db.addConstant("absent", null);
    // ordinary object should work fine
    db.addConstant("present", 100);

    final IComponentSource<Integer, String> counterSource =
        new IComponentSource<Integer, String>() {
          int c = 0;

          @Override
          public Integer get(Map<String, IComponentSource<?, String>> dependencies) {
            return c++;
          }
        };
    try {
      db.addConstant("counter", counterSource);
      fail("Component sources cannot be added as constant");
    } catch (IllegalArgumentException e) {
      // do nothing
    }
  }
コード例 #2
0
  @Test
  public void testAdd() {
    final DependencyBuilder<String> db = new DependencyBuilder<String>();
    try {
      db.add(null, DI.constantly("", String.class));
      fail("null key should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }
    try {
      db.add("absent", null);
      fail("null source should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }

    // adding source first time should work fine
    db.add("foo", DI.constantly(10, String.class));

    // repeated adding of source for same key should fail
    try {
      db.add("foo", DI.constantly(20, String.class));
      fail("Duplicating adding of source for same key should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }
  }
コード例 #3
0
  @Test
  public void testAddFactory() {
    final DependencyBuilder<String> db = new DependencyBuilder<String>();
    try {
      db.addFactory(null, DI.constantly("", String.class));
      fail("null key should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }
    try {
      db.addFactory("absent", null);
      fail("null source should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }

    final IComponentSource<Integer, String> counterSource =
        new IComponentSource<Integer, String>() {
          int c = 0;

          @Override
          public Integer get(Map<String, IComponentSource<?, String>> dependencies) {
            return c++;
          }
        };
    db.addFactory("counter", counterSource);
    try {
      db.addFactory("counter2", DI.singleton(counterSource));
      fail("Singleton cannot be added as factory");
    } catch (IllegalArgumentException e) {
      // do nothing
    }
  }
コード例 #4
0
  @Test
  public void testAddSingleton() {
    final DependencyBuilder<String> db = new DependencyBuilder<String>();
    try {
      db.addSingleton(null, DI.constantly("", String.class));
      fail("null key should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }
    try {
      db.addSingleton("absent", null);
      fail("null source should be rejected");
    } catch (IllegalArgumentException e) {
      // do nothing
    }

    final IComponentSource<Integer, String> counterSource =
        new IComponentSource<Integer, String>() {
          int c = 0;

          @Override
          public Integer get(Map<String, IComponentSource<?, String>> dependencies) {
            return c++;
          }
        };
    Map<String, IComponentSource<?, String>> deps =
        new MapBuilder<String, IComponentSource<?, String>>().add("counter", counterSource).get();

    // factory returns a new value on each call
    assertEquals(new Integer(0), DI.getInstance(deps, "counter", Integer.class));
    assertEquals(new Integer(1), DI.getInstance(deps, "counter", Integer.class));

    // singleton returns the same cached value that is generated once
    db.addSingleton("counter", counterSource);
    assertEquals(new Integer(2), db.getInstance("counter", Integer.class));
    assertEquals(new Integer(2), db.getInstance("counter", Integer.class));

    // adding a singleton as singleton should also work fine
    final IComponentSource<?, String> singleton = DI.singleton(counterSource);
    db.addSingleton("counter2", singleton);
  }