diff --git a/Jenkinsfile b/Jenkinsfile
new file mode 100644
index 0000000..034c3cd
--- /dev/null
+++ b/Jenkinsfile
@@ -0,0 +1,13 @@
+pipeline {
+    agent any
+
+    stages {
+        stage('mocha') {
+            steps {
+                sh 'npm install --dev'
+                sh 'npm run test'
+            }
+        }
+    }
+}
+
diff --git a/package.json b/package.json
index fdd1af2..4edfcec 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,9 @@
   "description": "Web scraper using CSS selector",
   "version": "1.1.0",
   "main": "src/index.js",
-  "devDependencies": {},
+  "devDependencies": {
+    "mocha": "^8.1.3"
+  },
   "dependencies": {
     "cheerio": "^1.0.0-rc.3",
     "extends-classes": "^1.0.5",
@@ -14,7 +16,7 @@
     "trim": "^0.0.1"
   },
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "mocha"
   },
   "repository": {
     "type": "git",
diff --git a/test/breaks.test.js b/test/breaks.test.js
new file mode 100644
index 0000000..53672d7
--- /dev/null
+++ b/test/breaks.test.js
@@ -0,0 +1,20 @@
+const filter = require('../src/filter/breaks')
+const assert = require('assert')
+
+describe('Check "breaks"', () => {
+    it('Should return empty string', () => {
+        assert.equal(filter("\n"), "")
+    })
+
+    it('Should return empty string', () => {
+        assert.equal(filter("\r"), "")
+    })
+
+    it('Should return "foo"', () => {
+        assert.equal(filter("foo"), "foo")
+    })
+
+    it('Should return "foobar"', () => {
+        assert.equal(filter("\r\nfoo\nbar\r\n"), "foobar")
+    })
+});
diff --git a/test/spaces.test.js b/test/spaces.test.js
new file mode 100644
index 0000000..6551871
--- /dev/null
+++ b/test/spaces.test.js
@@ -0,0 +1,16 @@
+const filter = require('../src/filter/spaces')
+const assert = require('assert')
+
+describe('Check "spaces"', () => {
+    it('Should return ""', () => {
+        assert.equal(filter(""), "")
+    })
+
+    it('Should return "foo bar"', () => {
+        assert.equal(filter("foo  bar"), "foo bar")
+    })
+
+    it('Should return "foo bar"', () => {
+        assert.equal(filter("foo \nbar"), "foo bar")
+    })
+});
diff --git a/test/tags.test.js b/test/tags.test.js
new file mode 100644
index 0000000..de29bfb
--- /dev/null
+++ b/test/tags.test.js
@@ -0,0 +1,5 @@
+const filter = require('../src/filter/tags')
+const assert = require('assert')
+
+describe('Check "tags"', () => {
+});
diff --git a/test/trim.test.js b/test/trim.test.js
new file mode 100644
index 0000000..36c8f0e
--- /dev/null
+++ b/test/trim.test.js
@@ -0,0 +1,20 @@
+const filter = require('../src/filter/trim')
+const assert = require('assert')
+
+describe('Check "trim"', () => {
+    it('Should return ""', () => {
+        assert.equal(filter(""), "")
+    })
+
+    it('Should return ""', () => {
+        assert.equal(filter(" "), "")
+    })
+
+    it('Should return "foo"', () => {
+        assert.equal(filter(" foo "), "foo")
+    })
+
+    it('Should return "foo bar"', () => {
+        assert.equal(filter(" foo bar \n"), "foo bar")
+    })
+});