Added W3C Blob.slice test cases #89

Author: wkh237

test/test-0.9.2.js

@@ -1,7 +1,6 @@
 import RNTest from './react-native-testkit/'
 import React from 'react'
 import RNFetchBlob from 'react-native-fetch-blob'
-
 import {
   StyleSheet,
   Text,
@@ -45,3 +44,104 @@ describe('content-length header test', (report, done) => {
     done()
   })
 })
+
+describe('slice test', (report, done) => {
+  let str = "PASSSTRING"
+  let tmp = fs.dirs.DocumentDir + '/slice-tmp-'
+  let testData = [
+       {start:   4, contents: "STRING"},
+       {start:  12, contents: ""},
+       {start: 0, end:   4, contents: "PASS"},
+       {start: 0, end:  12, contents: "PASSSTRING"},
+       {start: 7, end:   4, contents: ""},
+       {start:  -6, contents: "STRING"},
+       {start: -12, contents: "PASSSTRING"},
+       {start: 0, end:  -6, contents: "PASS"},
+       {start: 0, end: -12, contents: ""},
+     ]
+  fs.writeFile(tmp, str, 'utf8')
+    .then(() => {
+      let promises = []
+      for(let t in testData) {
+        let p = fs.slice(tmp, tmp + t, testData[t].start, testData[t].end)
+        .then(function(num) {
+          console.log('slice finished', num)
+          return fs.readFile(tmp + num, 'utf8')
+          .then((data) => {
+            report(<Assert key={`assertion-${num}`} expect={testData[num].contents} actual={data}/>)
+            return Promise.resolve()
+          })
+        }.bind(this, t))
+        promises.push(p)
+      }
+      Promise.all(promises).then((res) => {
+        done()
+      })
+
+    })
+})
+
+
+describe('fs.slice test', (report, done) => {
+
+  let source = null
+  let parts = fs.dirs.DocumentDir + '/tmp-source-'
+  let dests = []
+  let combined = fs.dirs.DocumentDir + '/combined-' + Date.now() + '.jpg'
+  let size = 0
+
+  window.fetch = new RNFetchBlob.polyfill.Fetch({
+    auto : true,
+    binaryContentTypes : ['image/', 'video/', 'audio/']
+  }).build()
+
+  fetch(`${TEST_SERVER_URL}/public/github2.jpg`)
+  .then((res) => res.rawResp())
+  .then((res) => {
+    source = res.path()
+    return fs.stat(source)
+  })
+  // separate file into 4kb chunks
+  .then((stat) => {
+    size = stat.size
+    let promise = Promise.resolve()
+    let cursor = 0
+    while(cursor < size) {
+      promise = promise.then(function(start) {
+        console.log('slicing part ', start , start + 40960)
+        let offset = 0
+        return fs.slice(source, parts + start, start + offset, start + 40960)
+                .then((dest) => {
+                  console.log('slicing part ', start + offset, start + 40960, 'done')
+                  dests.push(dest)
+                  return Promise.resolve()
+                })
+      }.bind(this, cursor))
+      cursor += 40960
+    }
+    console.log('loop end')
+    return promise
+  })
+  // combine chunks and verify the result
+  .then(() => {
+    console.log('combinding files')
+    let p = Promise.resolve()
+    for(let d in dests) {
+      p = p.then(function(chunk){
+        return fs.appendFile(combined, chunk, 'uri').then((write) => {
+          console.log(write, 'bytes write')
+        })
+      }.bind(this, dests[d]))
+    }
+    return p.then(() => fs.stat(combined))
+  })
+  .then((stat) => {
+    report(
+      <Assert key="verify file size" expect={size} actual={stat.size}/>,
+      <Info key="image viewer">
+        <Image key="combined image" style={styles.image} source={{ uri : prefix + combined}}/>
+      </Info>)
+    done()
+  })
+
+})