diff options
Diffstat (limited to 'java/src/test/java/com/google/protobuf/LazyStringArrayListTest.java')
-rw-r--r-- | java/src/test/java/com/google/protobuf/LazyStringArrayListTest.java | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/java/src/test/java/com/google/protobuf/LazyStringArrayListTest.java b/java/src/test/java/com/google/protobuf/LazyStringArrayListTest.java index f3012b96..0f42ac50 100644 --- a/java/src/test/java/com/google/protobuf/LazyStringArrayListTest.java +++ b/java/src/test/java/com/google/protobuf/LazyStringArrayListTest.java @@ -30,9 +30,13 @@ package com.google.protobuf; +import static java.util.Arrays.asList; + import junit.framework.TestCase; import java.util.ArrayList; +import java.util.ConcurrentModificationException; +import java.util.Iterator; import java.util.List; /** @@ -171,4 +175,188 @@ public class LazyStringArrayListTest extends TestCase { assertSame(BYTE_STRING_B, list2.getByteString(1)); assertSame(BYTE_STRING_C, list2.getByteString(2)); } + + public void testModificationWithIteration() { + LazyStringArrayList list = new LazyStringArrayList(); + list.addAll(asList(STRING_A, STRING_B, STRING_C)); + Iterator<String> iterator = list.iterator(); + assertEquals(3, list.size()); + assertEquals(STRING_A, list.get(0)); + assertEquals(STRING_A, iterator.next()); + + // Does not structurally modify. + iterator = list.iterator(); + list.set(0, STRING_B); + iterator.next(); + + list.remove(0); + try { + iterator.next(); + fail(); + } catch (ConcurrentModificationException e) { + // expected + } + + iterator = list.iterator(); + list.add(0, STRING_C); + try { + iterator.next(); + fail(); + } catch (ConcurrentModificationException e) { + // expected + } + } + + public void testMakeImmutable() { + LazyStringArrayList list = new LazyStringArrayList(); + list.add(STRING_A); + list.add(STRING_B); + list.add(STRING_C); + list.makeImmutable(); + assertGenericListImmutable(list, STRING_A); + + // LazyStringArrayList has extra methods not covered in the generic + // assertion. + + try { + list.add(BYTE_STRING_A.toByteArray()); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.add(BYTE_STRING_A); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.addAllByteArray(asList(BYTE_STRING_A.toByteArray())); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.addAllByteString(asList(BYTE_STRING_A)); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.mergeFrom(new LazyStringArrayList()); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.set(0, BYTE_STRING_A.toByteArray()); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.set(0, BYTE_STRING_A); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + } + + public void testImmutabilityPropagation() { + LazyStringArrayList list = new LazyStringArrayList(); + list.add(STRING_A); + list.makeImmutable(); + + assertGenericListImmutable(list.asByteStringList(), BYTE_STRING_A); + + // Arrays use reference equality so need to retrieve the underlying value + // to properly test deep immutability. + List<byte[]> byteArrayList = list.asByteArrayList(); + assertGenericListImmutable(byteArrayList, byteArrayList.get(0)); + } + + private static <T> void assertGenericListImmutable(List<T> list, T value) { + try { + list.add(value); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.add(0, value); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.addAll(asList(value)); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.addAll(0, asList(value)); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.clear(); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.remove(0); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.remove(value); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.removeAll(asList(value)); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.retainAll(asList()); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.retainAll(asList()); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + + try { + list.set(0, value); + fail(); + } catch (UnsupportedOperationException e) { + // expected + } + } } |