add tests for clipboard lib

src/lib/utils/clipboardIo.js

@@ -1,27 +1,6 @@
 import Lib from 'plotly.js/src/lib'
 import dataUrlToBlob from 'dataurl-to-blob'
 
-async function _copyBlob (blob) {
-  await navigator.clipboard.write([
-    new ClipboardItem({ // eslint-disable-line no-undef
-      [blob.type]: blob
-    })
-  ])
-}
-
-async function _copyFromDataUrl (url) {
-  const blob = dataUrlToBlob(url)
-  await _copyBlob(blob)
-  Lib.notifier('Image copied to clipboard successfully', 'long')
-}
-
-async function _copyCanvas (canvas) {
-  canvas.toBlob(async (blob) => {
-    await _copyBlob(blob)
-    Lib.notifier('Image copied to clipboard successfully', 'long')
-  }, 'image/png', 1)
-}
-
 export default {
   async copyCsv (str) {
     await navigator.clipboard.writeText(str)
@@ -30,9 +9,30 @@ export default {
 
   async copyImage (source) {
     if (source instanceof HTMLCanvasElement) {
-      return _copyCanvas(source)
+      return this._copyCanvas(source)
     } else {
-      return _copyFromDataUrl(source)
-    }
+      return this._copyFromDataUrl(source)
+    }
+  },
+
+  async _copyBlob (blob) {
+    await navigator.clipboard.write([
+      new ClipboardItem({ // eslint-disable-line no-undef
+        [blob.type]: blob
+      })
+    ])
+  },
+
+  async _copyFromDataUrl (url) {
+    const blob = dataUrlToBlob(url)
+    await this._copyBlob(blob)
+    Lib.notifier('Image copied to clipboard successfully', 'long')
+  },
+
+  async _copyCanvas (canvas) {
+    canvas.toBlob(async (blob) => {
+      await this._copyBlob(blob)
+      Lib.notifier('Image copied to clipboard successfully', 'long')
+    }, 'image/png', 1)
   }
 }

tests/lib/utils/clipboardIo.spec.js

@@ -0,0 +1,30 @@
+import { expect } from 'chai'
+import cIo from '@/lib/utils/clipboardIo'
+import sinon from 'sinon'
+
+describe('clipboardIo.js', async () => {
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  it('copyCsv', async () => {
+    sinon.stub(navigator.clipboard, 'writeText').resolves(true)
+    await cIo.copyCsv('id\tname\r\n1\t2')
+    expect(navigator.clipboard.writeText.calledOnceWith('id\tname\r\n1\t2'))
+  })
+
+  it('copyImage for canvas calls _copyCanvas', async () => {
+    sinon.stub(cIo, '_copyCanvas').resolves(true)
+    const canvas = document.createElement('canvas')
+
+    await cIo.copyImage(canvas)
+    expect(cIo._copyCanvas.calledOnceWith(canvas))
+  })
+
+  it('copyImage for dataUrl calls _copyFromDataUrl', async () => {
+    sinon.stub(cIo, '_copyFromDataUrl').resolves(true)
+    const url = document.createElement('canvas').toDataURL()
+    await cIo.copyImage(url)
+    expect(cIo._copyFromDataUrl.calledOnceWith(url))
+  })
+})