Examples of rabbit.ui.internal.viewers.FilterableTreePathContentProvider

rabbit.ui.internal.viewers.FilterableTreePathContentProvider
Represents a content provider that can filter elements.
The difference between using a {@link ViewerFilter} and this content provideris that a {@link ViewerFilter} hides the filtered elements, but this classwill prevent the filtered element from being added to the tree in the first place. Also if all elements of a parent node are filtered, when using a {@link ViewerFilter} the tree will still display a plus/minus sign beside theparent node, when using this class that won't happen.

  public void getChildrenShouldRetainDuplicateChildrenWhenFiltering() {
    Object[] originalChildren = {Integer.valueOf(0), Integer.valueOf(0), "a"};
    Object[] expectedChildren = {Integer.valueOf(0), Integer.valueOf(0)};


    TreePath parent = newPath();
    FilterableTreePathContentProvider p = create(parent, originalChildren);
    p.addFilter(Predicates.instanceOf(String.class));


    assertThat(p.getChildren(parent), equalTo(expectedChildren));
  }

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  public void getChildrenShouldRetainTheOrderOfTheChildrenWhenFiltering() {
    Object[] original = {"3", Integer.valueOf(2), "1"};
    Object[] expected = {"3", "1"};


    TreePath parent = newPath();
    FilterableTreePathContentProvider provider = create(parent, original);
    provider.addFilter(Predicates.instanceOf(Integer.class));


    assertThat(provider.getChildren(parent), equalTo(expected));
  }

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    TreePath parent1 = newPath("1");
    TreePath parent2 = newPath("2");
    ITreePathContentProvider mock = mock(ITreePathContentProvider.class);
    given(mock.getChildren(parent1)).willReturn(expectedChildren1);
    given(mock.getChildren(parent2)).willReturn(expectedChildren2);
    FilterableTreePathContentProvider provider = create(mock);


    assertThat(provider.getChildren(parent1), equalTo(expectedChildren1));
    assertThat(provider.getChildren(parent2), equalTo(expectedChildren2));
  }

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  public void getChildrenShouldReturnAnEmptyArrayIfAllChildrenAreFilteredOut() {
    Object[] original = {"1", "2", "3"};
    Object[] expected = {};


    TreePath parent = newPath();
    FilterableTreePathContentProvider provider = create(parent, original);
    provider.addFilter(Predicates.alwaysTrue()); // Filters everything


    assertThat(provider.getChildren(parent), equalTo(expected));
  }

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  public void getChildrenShouldReturnFilteredChildrenWhenFiltering() {
    Object[] originalChildren = {Integer.valueOf(0), "string"};
    Object[] expectedChildren = {Integer.valueOf(0)};


    TreePath parent = newPath();
    FilterableTreePathContentProvider p = create(parent, originalChildren);
    p.addFilter(Predicates.instanceOf(String.class));


    assertThat(p.getChildren(parent), equalTo(expectedChildren));
  }

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  public void getElementsShouldRetainDuplicateElementsWhenFiltering() {
    Object[] originalElements = {0, "abc", 0, "def"};
    Object[] expectedElements = {0, 0};


    Object input = new Object();
    FilterableTreePathContentProvider p = create(input, originalElements);
    p.addFilter(Predicates.instanceOf(String.class));


    assertThat(p.getElements(input), equalTo(expectedElements));
  }

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  @Test
  public void getElementsShouldRetainDuplicateElementsWhenNoFiltering() {
    Object input = new Object();
    Object[] elements = {"", "1", "", "1"};
    FilterableTreePathContentProvider provider = create(input, elements);
    assertThat(provider.getElements(input), equalTo(elements));
  }

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  @Test
  public void getElementsShouldRetainTheCorrectElementsWhenNoFiltering() {
    Object input = "";
    Object[] elements = {"1", "2", "3"};
    FilterableTreePathContentProvider p = create(input, elements);
    assertThat(p.getElements(input), equalTo(elements));
  }

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  public void getElementsShouldRetainTheOrderOfTheElementsWhenFiltering() {
    Object[] originalElements = {"1", "2", "3"};
    Object[] expectedChildren = {"1", "3"};


    Object input = "";
    FilterableTreePathContentProvider p = create(input, originalElements);
    p.addFilter(Predicates.<Object> equalTo("2"));


    assertThat(p.getElements(input), equalTo(expectedChildren));
  }

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  public void getElementsShouldReturnAnEmptyArrayIfAllElementsAreFilteredOut() {
    Object[] originalElements = {"1", "2", "3"};
    Object[] expectedElements = {};


    Object input = "";
    FilterableTreePathContentProvider p = create(input, originalElements);
    p.addFilter(Predicates.instanceOf(String.class));


    assertThat(p.getElements(input), equalTo(expectedElements));
  }

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rabbit.ui.internal.viewers.FilterableTreePathContentProviderFilteringTest

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