check if possible to use worker for unit tests

src/app/compiler/compiler-utils.js

@@ -0,0 +1,43 @@
+const semver = require('semver')
+/* global Worker */
+
+/**
+ * Checks if the worker can be used to load a compiler.
+ * checks a compiler whitelist, browser support and OS.
+ */
+export function canUseWorker (selectedVersion) {
+  // Following restrictions should be deleted when Solidity will release fixed versions of compilers.
+  // See https://github.com/ethereum/remix-ide/issues/2461
+  const isChrome = !!window.chrome
+  const os = retrieveOS()
+  // define a whitelist for Linux
+  const linuxWL = ['0.4.26', '0.5.3', '0.5.4', '0.5.5']
+  const version = semver.coerce(selectedVersion)
+  // defining whitelist for chrome
+  let isFromWhiteList = false
+  switch (os) {
+    case 'Windows':
+      isFromWhiteList = semver.gt(version, '0.5.2') || version === '0.4.26'
+      break
+    case 'Linux':
+      isFromWhiteList = semver.gt(version, '0.5.13') || linuxWL.includes(version)
+      break
+    default :
+      isFromWhiteList = true
+  }
+  return browserSupportWorker() && (!isChrome || (isChrome && isFromWhiteList))
+}
+
+function browserSupportWorker () {
+  return document.location.protocol !== 'file:' && Worker !== undefined
+}
+
+function retrieveOS () {
+  let osName = 'Unknown OS'
+  if (navigator.platform.indexOf('Win') !== -1) {
+    osName = 'Windows'
+  } else if (navigator.platform.indexOf('Linux') !== -1) {
+    osName = 'Linux'
+  }
+  return osName
+}

src/app/tabs/compileTab/compilerContainer.js

@@ -1,4 +1,4 @@
-/* global Worker */
+
 const yo = require('yo-yo')
 const minixhr = require('minixhr')
 const helper = require('../../../lib/helper')
@@ -6,6 +6,7 @@ const addTooltip = require('../../ui/tooltip')
 const semver = require('semver')
 const modalDialogCustom = require('../../ui/modal-dialog-custom')
 const css = require('../styles/compile-tab-styles')
+import { canUseWorker } from '../../compiler/compiler-utils'
 
 class CompilerContainer {
 
@@ -397,30 +398,10 @@ class CompilerContainer {
       url = `${this.data.baseurl}/${this.data.selectedVersion}`
     }
 
-    // Following restrictions should be deleted when Solidity will release fixed versions of compilers.
-    // See https://github.com/ethereum/remix-ide/issues/2461
-    const isChrome = !!window.chrome
-    const os = this._retrieveOS()
-    // define a whitelist for Linux
-    const linuxWL = ['0.4.26', '0.5.3', '0.5.4', '0.5.5']
-    const version = semver.coerce(this.data.selectedVersion)
-    // defining whitelist for chrome
-    let isFromWhiteList = false
-    switch (os) {
-      case 'Windows':
-        isFromWhiteList = semver.gt(version, '0.5.2') || version === '0.4.26'
-        break
-      case 'Linux':
-        isFromWhiteList = semver.gt(version, '0.5.13') || linuxWL.includes(version)
-        break
-      default :
-        isFromWhiteList = true
-    }
-
     // Workers cannot load js on "file:"-URLs and we get a
     // "Uncaught RangeError: Maximum call stack size exceeded" error on Chromium,
     // resort to non-worker version in that case.
-    if (this.browserSupportWorker() && (!isChrome || (isChrome && isFromWhiteList))) {
+    if (canUseWorker(this.data.selectedVersion)) {
       this.compileTabLogic.compiler.loadVersion(true, url)
       this.setVersionText('(loading using worker)')
     } else {
@@ -429,16 +410,6 @@ class CompilerContainer {
     }
   }
 
-  _retrieveOS () {
-    let osName = 'Unknown OS'
-    if (navigator.platform.indexOf('Win') !== -1) {
-      osName = 'Windows'
-    } else if (navigator.platform.indexOf('Linux') !== -1) {
-      osName = 'Linux'
-    }
-    return osName
-  }
-
   _updateLanguageSelector () {
     // This is the first version when Yul is available
     if (!semver.valid(this._retrieveVersion()) || semver.lt(this._retrieveVersion(), 'v0.5.7+commit.6da8b019.js')) {
@@ -481,10 +452,6 @@ class CompilerContainer {
     this.data.compileTimeout = window.setTimeout(() => this.compileIfAutoCompileOn(), this.data.timeout)
   }
 
-  browserSupportWorker () {
-    return document.location.protocol !== 'file:' && Worker !== undefined
-  }
-
 }
 
 module.exports = CompilerContainer

src/app/tabs/test-tab.js

@@ -4,6 +4,7 @@ var tooltip = require('../ui/tooltip')
 var css = require('./styles/test-tab-styles')
 var remixTests = require('remix-tests')
 import { ViewPlugin } from '@remixproject/engine'
+import { canUseWorker } from '../compiler/compiler-utils'
 
 const TestTabLogic = require('./testTab/testTab')
 
@@ -153,8 +154,7 @@ module.exports = class TestTab extends ViewPlugin {
       let runningTest = {}
       runningTest[path] = { content }
       let currentCompilerUrl = this.baseurl + '/' + this.compileTab.getCurrentVersion()
-      let usingWorker = this.compileTab.compilerContainer.browserSupportWorker()
-      remixTests.runTestSources(runningTest, currentCompilerUrl, usingWorker, () => {}, () => {}, (error, result) => {
+      remixTests.runTestSources(runningTest, currentCompilerUrl, canUseWorker(this.compileTab.getCurrentVersion()), () => {}, () => {}, (error, result) => {
         if (error) return reject(error)
         resolve(result)
       }, (url, cb) => {
@@ -169,14 +169,20 @@ module.exports = class TestTab extends ViewPlugin {
       var runningTest = {}
       runningTest[testFilePath] = { content }
       let currentCompilerUrl = this.baseurl + '/' + this.compileTab.getCurrentVersion()
-      let usingWorker = this.compileTab.compilerContainer.browserSupportWorker()
-      remixTests.runTestSources(runningTest, currentCompilerUrl, usingWorker, (result) => { this.testCallback(result) }, (_err, result, cb) => { this.resultsCallback(_err, result, cb) }, (error, result) => {
-        this.updateFinalResult(error, result, testFilePath)
-        this.loading.hidden = true
-        callback(error)
-      }, (url, cb) => {
-        return this.compileTab.compileTabLogic.importFileCb(url, cb)
-      })
+      remixTests.runTestSources(
+        runningTest,
+        currentCompilerUrl,
+        canUseWorker(this.compileTab.getCurrentVersion()),
+        (result) => { this.testCallback(result) },
+        (_err, result, cb) => { this.resultsCallback(_err, result, cb) },
+        (error, result) => {
+          this.updateFinalResult(error, result, testFilePath)
+          this.loading.hidden = true
+          callback(error)
+        }, (url, cb) => {
+          return this.compileTab.compileTabLogic.importFileCb(url, cb)
+        }
+      )
     }).catch((error) => {
       if (error) return
     })