@Test
/**
* Test that equals() and hashCode() don't require exponential time on certain pathological
* schemas.
*/
public void testSchemaExplosion() throws Exception {
for (int i = 1; i < 15; i++) { // 15 is big enough to trigger
// create a list of records, each with a single field whose type is a
// union of all of the records.
List<Schema> recs = new ArrayList<Schema>();
for (int j = 0; j < i; j++)
recs.add(Schema.createRecord("" + (char) ('A' + j), null, null, false));
for (Schema s : recs) {
Schema union = Schema.createUnion(recs);
Field f = new Field("x", union, null, null);
List<Field> fields = new ArrayList<Field>();
fields.add(f);
s.setFields(fields);
}
// check that equals and hashcode are correct and complete in a
// reasonable amount of time
for (Schema s1 : recs) {
Schema s2 = Schema.parse(s1.toString());
assertEquals(s1.hashCode(), s2.hashCode());
assertEquals(s1, s2);
}
}
}
private static void checkUnionError(Schema[] branches) {
List<Schema> branchList = Arrays.asList(branches);
try {
Schema.createUnion(branchList);
fail("Union should not have constructed from: " + branchList);
} catch (AvroRuntimeException are) {
return;
}
}
@Test
public void testNestedNullNamespaceReferencingWithUnion() {
Schema inner = Schema.parse("{\"type\":\"record\",\"name\":\"Inner\",\"fields\":[]}");
Schema innerUnion = Schema.createUnion(Arrays.asList(inner, Schema.create(Type.NULL)));
Schema outer = Schema.createRecord("Outer", null, "space", false);
outer.setFields(
Arrays.asList(
new Field("f1", innerUnion, null, null), new Field("f2", innerUnion, null, null)));
assertEquals(outer, Schema.parse(outer.toString()));
}
private static Schema buildUnion(Schema[] branches) {
List<Schema> branchList = Arrays.asList(branches);
return Schema.createUnion(branchList);
}