@Test
public void addAndRemove() {
Set<MetricType> orig = AwsSdkMetrics.getPredefinedMetrics();
AwsSdkMetrics.set(null);
// Test add and remove
assertTrue(AwsSdkMetrics.getPredefinedMetrics().isEmpty());
AwsSdkMetrics.add(Field.ClientExecuteTime);
assertFalse(AwsSdkMetrics.getPredefinedMetrics().isEmpty());
AwsSdkMetrics.remove(Field.ClientExecuteTime);
assertTrue(AwsSdkMetrics.getPredefinedMetrics().isEmpty());
// Test add more than one entry
AwsSdkMetrics.add(Field.ClientExecuteTime);
AwsSdkMetrics.add(Field.Exception);
assertTrue(AwsSdkMetrics.getPredefinedMetrics().size() == 2);
AwsSdkMetrics.set(null);
assertTrue(AwsSdkMetrics.getPredefinedMetrics().isEmpty());
// Test addAll
AwsSdkMetrics.addAll(Arrays.asList(Field.Exception, Field.ClientExecuteTime));
assertTrue(AwsSdkMetrics.getPredefinedMetrics().size() == 2);
AwsSdkMetrics.set(orig);
assertTrue(AwsSdkMetrics.getPredefinedMetrics().size() == orig.size());
}
@Test
public void removeNull() {
assertFalse(AwsSdkMetrics.remove(null));
}