diff --git a/tests/unit/pipes.spec.js b/tests/unit/pipes.spec.js
new file mode 100644
index 00000000..e0c9763c
--- /dev/null
+++ b/tests/unit/pipes.spec.js
@@ -0,0 +1,90 @@
+'use strict';
+
+import {KeysPipe, ValuesPipe, JsonPointerEscapePipe, MarkedPipe} from 'lib/utils/pipes';
+
+describe('KeysPipe and ValuesPipe', () => {
+  let obj;
+  var keysPipe, valuesPipe;
+
+  beforeEach(() => {
+    obj = {
+      a: 1,
+      b: 2,
+      c: 3
+    };
+    keysPipe = new KeysPipe();
+    valuesPipe = new ValuesPipe();
+  });
+
+  describe('KeysPipe transform', () => {
+    it('should return keys', () => {
+      var val = keysPipe.transform(obj);
+      val.should.be.deep.equal(['a', 'b', 'c']);
+    });
+
+    it('should not support other objects', () => {
+      (() => keysPipe.transform(45)).should.throw();
+      (() => keysPipe.transform(null)).should.throw();
+    });
+  });
+
+  describe('KeysPipe transform', () => {
+    it('should return values', () => {
+      var val = valuesPipe.transform(obj);
+      val.should.be.deep.equal([1, 2, 3]);
+    });
+
+    it('should not support other objects', () => {
+      (() => valuesPipe.transform(45)).should.throw();
+      (() => valuesPipe.transform(null)).should.throw();
+    });
+  });
+});
+
+describe('JsonPointerEscapePipe', () => {
+  let unescaped;
+  let escaped;
+  var pipe;
+
+  beforeEach(() => {
+    unescaped = 'test/path~1';
+    escaped = 'test~1path~01';
+    pipe = new JsonPointerEscapePipe();
+  });
+
+  describe('KeysPipe transform', () => {
+    it('should escpae pointer', () => {
+      var val = pipe.transform(unescaped);
+      val.should.be.equal(escaped);
+    });
+
+    it('should not support other objects', () => {
+      (() => pipe.transform(45)).should.throw();
+      (() => pipe.transform({})).should.throw();
+    });
+  });
+});
+
+describe('MarkedPipe', () => {
+  let unmarked;
+  let marked;
+  var pipe;
+
+  beforeEach(() => {
+    unmarked = 'test\n';
+    marked = '<p>test</p>\n';
+    pipe = new MarkedPipe();
+  });
+
+  describe('KeysPipe transform', () => {
+    it('should escpae pointer', () => {
+      var val = pipe.transform(unmarked);
+      val.should.be.equal(marked);
+    });
+
+    it('should not support other objects', () => {
+      (() => pipe.transform(45)).should.throw();
+      (() => pipe.transform({})).should.throw();
+    });
+  });
+});