integration tests for metrics

cfg4j-core/src/test/java/org/cfg4j/provider/SimpleConfigurationProviderWithMeteredSourceIntegrationTest.java

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+/*
+ * Copyright 2015 Norbert Potocki (norbert.potocki@nort.pl)
+ *
+ * Licensed 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.cfg4j.provider;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.codahale.metrics.MetricRegistry;
+import org.cfg4j.source.ConfigurationSource;
+import org.cfg4j.source.inmemory.InMemoryConfigurationSource;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import java.util.Properties;
+
+
+@RunWith(MockitoJUnitRunner.class)
+public class SimpleConfigurationProviderWithMeteredSourceIntegrationTest {
+
+  @Rule
+  public ExpectedException expectedException = ExpectedException.none();
+
+  private MetricRegistry metricRegistry = new MetricRegistry();
+
+  @Test
+  public void shouldEmitMetrics() throws Exception {
+    ConfigurationProvider provider = getConfigurationProvider();
+
+    provider.getProperty("some.setting", Boolean.class);
+
+    assertThat(metricRegistry.getTimers()).containsOnlyKeys(
+        "testService.allConfigurationAsProperties",
+        "testService.getProperty",
+        "testService.getPropertyGeneric",
+        "testService.bind",
+        "testService.source.getConfiguration",
+        "testService.source.init",
+        "testService.source.reload"
+    );
+  }
+
+  private ConfigurationProvider getConfigurationProvider() {
+    Properties properties = new Properties();
+    properties.put("some.setting", "true");
+
+    ConfigurationSource source = new InMemoryConfigurationSource(properties);
+
+    return new ConfigurationProviderBuilder()
+        .withConfigurationSource(source)
+        .withMetrics(metricRegistry, "testService.")
+        .build();
+  }
+}