@Test
public void setNullOrEmpty() {
Set<MetricType> orig = AwsSdkMetrics.getPredefinedMetrics();
assertTrue(orig.size() > 0);
AwsSdkMetrics.set(null);
Set<MetricType> empty = AwsSdkMetrics.getPredefinedMetrics();
assertTrue(empty.size() == 0);
AwsSdkMetrics.set(null);
Set<MetricType> stillEmpty = AwsSdkMetrics.getPredefinedMetrics();
assertSame(empty, stillEmpty);
AwsSdkMetrics.set(Collections.<MetricType>emptySet());
Set<MetricType> empty3 = AwsSdkMetrics.getPredefinedMetrics();
assertSame(empty, empty3);
AwsSdkMetrics.set(orig);
}
@Test
public void defaultMetricTypes() {
// Default set of predefined metric types is not empty
Set<MetricType> set = AwsSdkMetrics.getPredefinedMetrics();
assertNotNull(set);
assertTrue(set.size() > 0);
// Clear out the default set of predefined metric types
AwsSdkMetrics.set(Collections.<MetricType>emptyList());
Set<MetricType> empty = AwsSdkMetrics.getPredefinedMetrics();
assertNotNull(empty);
assertTrue(empty.size() == 0);
// Reconfigure the default set of predefined metric types back to the original
AwsSdkMetrics.set(set);
Set<MetricType> set2 = AwsSdkMetrics.getPredefinedMetrics();
assertNotNull(set2);
assertTrue(set2.size() > 0);
// Not the same due to ensuring thread-safety
assertNotSame(set, set2);
}
@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());
}
