add badge

Jenkinsfile

@@ -1,3 +1,5 @@
+def unittestBadge = addEmbeddableBadgeConfiguration(id: "unittest", subject: "unit test")
+
 pipeline {
   agent {
     dockerfile true
@@ -40,10 +42,18 @@ pipeline {
 
       stage("test"){
        steps{
+        script{
+         unittestBadge.setStatus('running')
+         try{
           sh '''
            cd build
            ctest --output_on_failure
           '''
+         }catch(Exception error){
+          unittestBadge.setStatus('failed')
+          error 'unittest failed'
+         }
+        }
        }
       }
      }

README.md

@@ -1,3 +1,8 @@
+![https://jenkins.milkcocoa.info/job/CocoaTweet/job/master](https://jenkins.milkcocoa.info/job/CocoaTweet/job/master/badge/icon?style=plastic)
+![](https://img.shields.io/badge/libcurl-libcurl4--openssl-blue)
+![](https://img.shields.io/badge/libssl-1.1.1f-blue)
+![](http://jenkins.milkcocoa.info/job/CocoaTweet/job/master/badge/icon?style=plastic&config=unittest)
+
 # CocoaTweet
 This is a library for using Twitter API from C++