diff --git a/test/specs/gaspard.spec.js b/test/specs/gaspard.spec.js
new file mode 100644
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+++ b/test/specs/gaspard.spec.js
@@ -0,0 +1,185 @@
+import GaspardElements from 'src/gaspard'
+
+const attributes = require('src/attributes')
+const content = require('src/content')
+const effects = require('src/effects')
+const events = require('src/events')
+const selectors = require('src/selectors')
+/**
+ * @jest-environment jsdom
+ */
+describe('GaspardElements', () => {
+  let elements = []
+  let collection
+  const commonClass = 'commonClass'
+  beforeEach(() => {
+    [
+      ['span'],
+      ['div']
+    ].forEach(([tag, className]) => {
+      const element = document.createElement(tag)
+      element.className += commonClass
+      document.body.appendChild(element)
+      elements.push(element)
+    })
+    collection = new GaspardElements(elements)
+  })
+  afterEach(() => {
+    elements = []
+    collection = null
+    document.body.innerHTML = ''
+  })
+  describe('Initialisation', () => {
+    test('Array of elements', () => {
+      expect(collection).toBeInstanceOf(GaspardElements)
+      expect(collection.elements).toBeInstanceOf(Array)
+      expect(collection.elements.length).toBe(elements.length)
+    })
+    test('An element', () => {
+      const collection = new GaspardElements(elements[0])
+      expect(collection.elements.length).toBe(1)
+    })
+    test('Class name', () => {
+      const collection = new GaspardElements('.' + commonClass)
+      expect(collection.elements.length).toBe(elements.length)
+    })
+  })
+  test('Execute method', () => {
+    const method = jest.fn()
+    const myParam2 = 2
+    collection.each(method, 'myParam1', myParam2)
+    expect(method).toHaveBeenCalledTimes(2)
+    expect(method).toHaveBeenLastCalledWith(elements[1], 'myParam1', myParam2)
+  })
+  describe('Find', () => {
+    const find = jest.spyOn(selectors, 'find')
+    test('Existing', () => {
+      collection.elements[0].appendChild(document.createElement('p'))
+      const newCollection = collection.find('.commonClass p')
+      expect(find).toHaveBeenLastCalledWith('.commonClass p', elements[1])
+      expect(newCollection).toBeInstanceOf(GaspardElements)
+      expect(newCollection.elements.length).toBe(1)
+    })
+    test('Unexisting', () => {
+      const newCollection = collection.find('#testId')
+      expect(newCollection.elements.length).toBe(0)
+    })
+    test('Already exist child', () => {
+      collection.elements[0].appendChild(document.createElement('p'))
+      const newCollection = new GaspardElements([elements[0], elements[0].children[0].parentNode])
+      expect(newCollection.find('p').elements.length).toBe(1)
+    })
+  })
+  test('Add class', () => {
+    const addClass = jest.spyOn(attributes, 'addClass')
+    collection.addClass('myClass')
+    expect(addClass).toHaveBeenLastCalledWith(elements[1], 'myClass')
+  })
+  test('Remove class', () => {
+    const removeClass = jest.spyOn(attributes, 'removeClass')
+    collection.each(element => {
+      element.className += 'customClass'
+    })
+    collection.removeClass('myClass')
+    expect(removeClass).toHaveBeenLastCalledWith(elements[1], 'myClass')
+  })
+  test('Toggle class', () => {
+    const toggleClass = jest.spyOn(attributes, 'toggleClass')
+    collection.toggleClass('myClass2')
+    expect(toggleClass).toHaveBeenLastCalledWith(elements[1], 'myClass2', undefined)
+    collection.toggleClass('myClass2', true)
+    expect(toggleClass).toHaveBeenLastCalledWith(elements[1], 'myClass2', true)
+  })
+  test('Attribute', () => {
+    const attr = jest.spyOn(attributes, 'attr')
+    collection.attr('myAttr')
+    expect(attr).toHaveBeenLastCalledWith(elements[1], 'myAttr', undefined)
+    collection.attr('myAttr', true)
+    expect(attr).toHaveBeenLastCalledWith(elements[1], 'myAttr', true)
+  })
+  test('CSS', () => {
+    const css = jest.spyOn(attributes, 'css')
+    collection.css('color', 'red')
+    expect(css).toHaveBeenLastCalledWith(elements[1], 'color', 'red')
+  })
+  test('Before', () => {
+    const before = jest.spyOn(content, 'before')
+    collection.before('<img />')
+    expect(before).toHaveBeenLastCalledWith(elements[1], '<img />')
+  })
+  test('After', () => {
+    const after = jest.spyOn(content, 'after')
+    collection.after('<img />')
+    expect(after).toHaveBeenLastCalledWith(elements[1], '<img />')
+  })
+  test('Prepend', () => {
+    const prepend = jest.spyOn(content, 'prepend')
+    const img = document.createElement('img')
+    collection.prepend(img)
+    expect(prepend).toHaveBeenLastCalledWith(elements[1], img)
+  })
+  test('Append', () => {
+    const append = jest.spyOn(content, 'append')
+    const img = document.createElement('img')
+    collection.append(img)
+    expect(append).toHaveBeenLastCalledWith(elements[1], img)
+  })
+  test('Remove', () => {
+    const remove = jest.spyOn(content, 'remove')
+    collection.remove()
+    expect(remove).toHaveBeenLastCalledWith(elements[1])
+  })
+  test('Text', () => {
+    const text = jest.spyOn(content, 'text')
+    collection.text('textTest')
+    expect(text).toHaveBeenLastCalledWith(elements[1], 'textTest')
+  })
+  test('Html', () => {
+    const html = jest.spyOn(content, 'html')
+    collection.html('htmlTest')
+    expect(html).toHaveBeenLastCalledWith(elements[1], 'htmlTest')
+  })
+  test('Replace with', () => {
+    const replaceWith = jest.spyOn(content, 'replaceWith')
+    collection.replaceWith('<img />')
+    expect(replaceWith).toHaveBeenLastCalledWith(elements[1], '<img />')
+  })
+  test('Fade in', () => {
+    const fadeIn = jest.spyOn(effects, 'fadeIn')
+    collection.fadeIn(200)
+    expect(fadeIn).toHaveBeenLastCalledWith(elements[1], 200)
+  })
+  test('Fade out', () => {
+    const fadeOut = jest.spyOn(effects, 'fadeOut')
+    collection.fadeOut(200)
+    expect(fadeOut).toHaveBeenLastCalledWith(elements[1], 200)
+  })
+  test('Show', () => {
+    const show = jest.spyOn(effects, 'show')
+    collection.show()
+    expect(show).toHaveBeenLastCalledWith(elements[1])
+  })
+  test('Hide', () => {
+    const hide = jest.spyOn(effects, 'hide')
+    collection.hide()
+    expect(hide).toHaveBeenLastCalledWith(elements[1])
+  })
+  test('On', () => {
+    const on = jest.spyOn(events, 'on')
+    const handler = jest.fn()
+    collection.on('click', handler)
+    expect(on).toHaveBeenLastCalledWith(elements[1], 'click', handler)
+  })
+  test('Off', () => {
+    const off = jest.spyOn(events, 'off')
+    const handler = jest.fn()
+    collection.off('click', handler)
+    expect(off).toHaveBeenLastCalledWith(elements[1], 'click', handler)
+  })
+  test('Trigger', () => {
+    const trigger = jest.spyOn(events, 'trigger')
+    const data = {}
+    collection.trigger('click', data)
+    expect(trigger).toHaveBeenLastCalledWith(elements[1], 'click', data)
+  })
+})