refactored snippet dataApi for easy testing and added some test. Fixed old snippet still display when deleted

browser/main/lib/dataApi/createSnippet.js

@@ -3,20 +3,22 @@ import crypto from 'crypto'
 import consts from 'browser/lib/consts'
 import fetchSnippet from 'browser/main/lib/dataApi/fetchSnippet'
 
-function createSnippet () {
+function createSnippet (snippetFile) {
   return new Promise((resolve, reject) => {
-    fetchSnippet().then((snippets) => {
-      const newSnippet = {
-        id: crypto.randomBytes(16).toString('hex'),
-        name: 'Unnamed snippet',
-        prefix: [],
-        content: ''
-      }
+    const newSnippet = {
+      id: crypto.randomBytes(16).toString('hex'),
+      name: 'Unnamed snippet',
+      prefix: [],
+      content: ''
+    }
+    fetchSnippet(null, snippetFile).then((snippets) => {
       snippets.push(newSnippet)
-      fs.writeFile(consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
+      fs.writeFile(snippetFile || consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
         if (err) reject(err)
         resolve(newSnippet)
       })
+    }).catch((err) => {
+      reject(err)
     })
   })
 }

browser/main/lib/dataApi/deleteSnippet.js

@@ -2,11 +2,11 @@ import fs from 'fs'
 import consts from 'browser/lib/consts'
 import fetchSnippet from 'browser/main/lib/dataApi/fetchSnippet'
 
-function deleteSnippet (snippet) {
+function deleteSnippet (snippet, snippetFile) {
   return new Promise((resolve, reject) => {
-    fetchSnippet().then((snippets) => {
+    fetchSnippet(null, snippetFile).then((snippets) => {
       snippets = snippets.filter(currentSnippet => currentSnippet.id !== snippet.id)
-      fs.writeFile(consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
+      fs.writeFile(snippetFile || consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
         if (err) reject(err)
         resolve(snippet)
       })

browser/main/lib/dataApi/fetchSnippet.js

@@ -2,9 +2,9 @@ import fs from 'fs'
 import crypto from 'crypto'
 import consts from 'browser/lib/consts'
 
-function fetchSnippet (id) {
+function fetchSnippet (id, snippetFile) {
   return new Promise((resolve, reject) => {
-    fs.readFile(consts.SNIPPET_FILE, 'utf8', (err, data) => {
+    fs.readFile(snippetFile || consts.SNIPPET_FILE, 'utf8', (err, data) => {
       if (err) {
         reject(err)
       }

browser/main/lib/dataApi/updateSnippet.js

@@ -1,9 +1,9 @@
 import fs from 'fs'
 import consts from 'browser/lib/consts'
 
-function updateSnippet (snippet) {
+function updateSnippet (snippet, snippetFile) {
   return new Promise((resolve, reject) => {
-    const snippets = JSON.parse(fs.readFileSync(consts.SNIPPET_FILE, 'utf-8'))
+    const snippets = JSON.parse(fs.readFileSync(snippetFile || consts.SNIPPET_FILE, 'utf-8'))
 
     for (let i = 0; i < snippets.length; i++) {
       const currentSnippet = snippets[i]
@@ -20,7 +20,7 @@ function updateSnippet (snippet) {
           currentSnippet.name = snippet.name
           currentSnippet.prefix = snippet.prefix
           currentSnippet.content = snippet.content
-          fs.writeFile(consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
+          fs.writeFile(snippetFile || consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
             if (err) reject(err)
             resolve(snippets)
           })

browser/main/modals/PreferencesModal/SnippetTab.js

@@ -63,6 +63,10 @@ class SnippetTab extends React.Component {
   deleteSnippet (snippet) {
     dataApi.deleteSnippet(snippet).then(() => {
       this.reloadSnippetList()
+      // prevent old snippet still display when deleted
+      if (snippet.id === this.state.currentSnippet.id) {
+        this.setState({currentSnippet: null})
+      }
     }).catch(err => { throw err })
   }
 

tests/dataApi/createSnippet-test.js

@@ -0,0 +1,34 @@
+const test = require('ava')
+const createSnippet = require('browser/main/lib/dataApi/createSnippet')
+const sander = require('sander')
+const os = require('os')
+const path = require('path')
+
+const snippetFilePath = path.join(os.tmpdir(), `test${path.sep}create-snippet`)
+const snippetFile = path.join(snippetFilePath, 'snippets.json')
+
+test.beforeEach((t) => {
+  sander.writeFileSync(snippetFile, '[]')
+})
+
+test.serial('Create a snippet', (t) => {
+  return Promise.resolve()
+    .then(function doTest () {
+      return Promise.all([
+        createSnippet(snippetFile)
+      ])
+    })
+    .then(function assert (data) {
+      data = data[0]
+      const snippets = JSON.parse(sander.readFileSync(snippetFile))
+      const snippet = snippets.find(currentSnippet => currentSnippet.id === data.id)
+      t.not(snippet, undefined)
+      t.is(snippet.name, data.name)
+      t.deepEqual(snippet.prefix, data.prefix)
+      t.is(snippet.content, data.content)
+    })
+})
+
+test.after.always(() => {
+  sander.rimrafSync(snippetFilePath)
+})

tests/dataApi/deleteSnippet-test.js

@@ -0,0 +1,38 @@
+const test = require('ava')
+const deleteSnippet = require('browser/main/lib/dataApi/deleteSnippet')
+const sander = require('sander')
+const os = require('os')
+const path = require('path')
+const crypto = require('crypto')
+
+const snippetFilePath = path.join(os.tmpdir(), `test${path.sep}delete-snippet`)
+const snippetFile = path.join(snippetFilePath, 'snippets.json')
+const newSnippet = {
+  id: crypto.randomBytes(16).toString('hex'),
+  name: 'Unnamed snippet',
+  prefix: [],
+  content: ''
+}
+
+test.beforeEach((t) => {
+  sander.writeFileSync(snippetFile, JSON.stringify([newSnippet]))
+})
+
+test.serial('Delete a snippet', (t) => {
+  return Promise.resolve()
+    .then(function doTest () {
+      return Promise.all([
+        deleteSnippet(newSnippet, snippetFile)
+      ])
+    })
+    .then(function assert (data) {
+      data = data[0]
+      const snippets = JSON.parse(sander.readFileSync(snippetFile))
+      const snippet = snippets.find(currentSnippet => currentSnippet.id === data.id)
+      t.is(snippets.length, 0)
+    })
+})
+
+test.after.always(() => {
+  sander.rimrafSync(snippetFilePath)
+})

tests/dataApi/updateSnippet-test.js

@@ -0,0 +1,48 @@
+const test = require('ava')
+const updateSnippet = require('browser/main/lib/dataApi/updateSnippet')
+const sander = require('sander')
+const os = require('os')
+const path = require('path')
+const crypto = require('crypto')
+
+const snippetFilePath = path.join(os.tmpdir(), `test${path.sep}update-snippet`)
+const snippetFile = path.join(snippetFilePath, 'snippets.json')
+const oldSnippet = {
+  id: crypto.randomBytes(16).toString('hex'),
+  name: 'Initial snippet',
+  prefix: [],
+  content: ''
+}
+
+const newSnippet = {
+  id: oldSnippet.id,
+  name: 'new name',
+  prefix: ['prefix'],
+  content: 'new content'
+}
+
+
+test.beforeEach((t) => {
+  sander.writeFileSync(snippetFile, JSON.stringify([oldSnippet]))
+})
+
+test.serial('Update a snippet', (t) => {
+  return Promise.resolve()
+    .then(function doTest () {
+      return Promise.all([
+        updateSnippet(newSnippet, snippetFile)
+      ])
+    })
+    .then(function assert () {
+      const snippets = JSON.parse(sander.readFileSync(snippetFile))
+      const snippet = snippets.find(currentSnippet => currentSnippet.id === newSnippet.id)
+      t.not(snippet, undefined)
+      t.is(snippet.name, newSnippet.name)
+      t.deepEqual(snippet.prefix, newSnippet.prefix)
+      t.is(snippet.content, newSnippet.content)
+    })
+})
+
+test.after.always(() => {
+  sander.rimrafSync(snippetFilePath)
+})