add test coverage

Signed-off-by: Sergei Malafeev <sergeymalafeev@gmail.com>

.travis.yml

@@ -29,6 +29,9 @@ branches:
   except:
     - /^[0-9]/
 
+after_success:
+  - mvn jacoco:report coveralls:report
+
 env:
   global:
   # Ex. travis encrypt BINTRAY_USER=your_github_account

README.md

@@ -1,4 +1,4 @@
-[![Build Status][ci-img]][ci] [![Released Version][maven-img]][maven]
+[![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov] [![Released Version][maven-img]][maven]
 
 
 # OpenTracing Redis Client Instrumentation
@@ -116,5 +116,7 @@ RedisAsyncCommands<String, String> commandsAsync = connection.async();
 
 [ci-img]: https://travis-ci.org/opentracing-contrib/java-redis-client.svg?branch=master
 [ci]: https://travis-ci.org/opentracing-contrib/java-redis-client
+[cov-img]: https://coveralls.io/repos/github/opentracing-contrib/java-redis-client/badge.svg?branch=master
+[cov]: https://coveralls.io/github/opentracing-contrib/java-redis-client?branch=master
 [maven-img]: https://img.shields.io/maven-central/v/io.opentracing.contrib/opentracing-redis-parent.svg
 [maven]: http://search.maven.org/#search%7Cga%7C1%7Copentracing-redis-parent

pom.xml

@@ -67,6 +67,8 @@
     <project.build.resourceEncoding>UTF-8</project.build.resourceEncoding>
 
     <opentracing.version>0.31.0</opentracing.version>
+    <coveralls-maven-plugin.version>4.3.0</coveralls-maven-plugin.version>
+    <jacoco-maven-plugin.version>0.8.1</jacoco-maven-plugin.version>
   </properties>
 
   <dependencyManagement>
@@ -167,6 +169,7 @@
             <exclude>mvnw</exclude>
             <exclude>mvnw.cmd</exclude>
             <exclude>.mvn/wrapper/maven-wrapper.properties</exclude>
+            <exclude>.coveralls.yml</exclude>
           </excludes>
         </configuration>
         <executions>
@@ -178,6 +181,24 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.eluder.coveralls</groupId>
+        <artifactId>coveralls-maven-plugin</artifactId>
+        <version>${coveralls-maven-plugin.version}</version>
+      </plugin>
+      <plugin>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>${jacoco-maven-plugin.version}</version>
+        <executions>
+          <execution>
+            <id>prepare-agent</id>
+            <goals>
+              <goal>prepare-agent</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>