add test for exportToFile

karma.conf.js

@@ -126,7 +126,7 @@ module.exports = function (config) {
           {
             test: /\.js$/,
             include: /src/,
-            exclude: /(node_modules|bower_components|\.spec\.js$|\/file)/,
+            exclude: /(node_modules|bower_components|\.spec\.js$)/,
             use: [
               {
                 loader: 'istanbul-instrumenter-loader',

src/views/MyQueries.vue

@@ -157,7 +157,7 @@ import TextField from '@/components/TextField'
 import CheckBox from '@/components/CheckBox'
 import tooltipMixin from '@/mixins/tooltips'
 import storedQueries from '@/storedQueries'
-import fu from '@/fileUtilities'
+import fu from '@/fileUtils'
 
 export default {
   name: 'MyQueries',

tests/unit/fileUtils.spec.js

@@ -0,0 +1,70 @@
+import { expect } from 'chai'
+import fu from '@/fileUtils.js'
+import sinon from 'sinon'
+
+describe('fileUtils.js', () => {
+  afterEach(()=> {
+    document.createElement.restore()
+    URL.revokeObjectURL.restore()
+    URL.createObjectURL.restore()
+    window.Blob.restore()
+  })
+
+  it('exportToFile (octet/stream by default)', () => {
+    const spyAnchor = document.createElement('a')
+    sinon.spy(spyAnchor, 'click')
+    sinon.spy(spyAnchor, 'remove')
+    sinon.stub(document, 'createElement').returns(spyAnchor)
+    sinon.spy(URL, 'createObjectURL')
+    sinon.spy(URL, 'revokeObjectURL')
+    sinon.spy(window, 'Blob')
+    
+    const str = 'foo'
+    fu.exportToFile('foo','foo.txt')
+    
+    expect(document.createElement.calledOnceWith('a')).to.equal(true)
+    
+    expect(window.Blob.calledOnceWith(['foo'], { type: 'octet/stream' })).to.equal(true)
+    const blob = window.Blob.returnValues[0]
+    expect(URL.createObjectURL.calledOnceWith(blob)).to.equal(true) 
+    
+    const url = URL.createObjectURL.returnValues[0]
+    expect(spyAnchor.href).to.equal(url)
+
+    expect(spyAnchor.download).to.equal('foo.txt')
+
+    expect(spyAnchor.click.calledOnce).to.equal(true)
+
+    expect(spyAnchor.remove.calledOnce).to.equal(true)
+    expect(URL.revokeObjectURL.calledOnceWith(url)).to.equal(true)
+  }),
+
+  it('exportToFile', () => {
+    const spyAnchor = document.createElement('a')
+    sinon.spy(spyAnchor, 'click')
+    sinon.spy(spyAnchor, 'remove')
+    sinon.stub(document, 'createElement').returns(spyAnchor)
+    sinon.spy(URL, 'createObjectURL')
+    sinon.spy(URL, 'revokeObjectURL')
+    sinon.spy(window, 'Blob')
+    
+    const str = 'foo'
+    fu.exportToFile('foo','foo.html', 'text/html')
+    
+    expect(document.createElement.calledOnceWith('a')).to.equal(true)
+    
+    expect(window.Blob.calledOnceWith(['foo'], { type: 'text/html' })).to.equal(true)
+    const blob = window.Blob.returnValues[0]
+    expect(URL.createObjectURL.calledOnceWith(blob)).to.equal(true) 
+    
+    const url = URL.createObjectURL.returnValues[0]
+    expect(spyAnchor.href).to.equal(url)
+
+    expect(spyAnchor.download).to.equal('foo.html')
+
+    expect(spyAnchor.click.calledOnce).to.equal(true)
+
+    expect(spyAnchor.remove.calledOnce).to.equal(true)
+    expect(URL.revokeObjectURL.calledOnceWith(url)).to.equal(true)
+  })
+})