| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.htrace; |
| |
| import org.apache.htrace.HTraceConfiguration; |
| import org.apache.htrace.impl.CountSampler; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class TestCountSampler { |
| |
| @Test |
| public void testNext() { |
| CountSampler half = new CountSampler(HTraceConfiguration. |
| fromKeyValuePairs("sampler.frequency", "2")); |
| CountSampler hundred = new CountSampler(HTraceConfiguration. |
| fromKeyValuePairs("sampler.frequency", "100")); |
| int halfCount = 0; |
| int hundredCount = 0; |
| for (int i = 0; i < 200; i++) { |
| if (half.next(null)) |
| halfCount++; |
| if (hundred.next(null)) |
| hundredCount++; |
| } |
| Assert.assertEquals(2, hundredCount); |
| Assert.assertEquals(100, halfCount); |
| } |
| } |