added a e2e test for optimization

apps/remix-ide-e2e/src/tests/compiler_api.test.ts

@@ -26,6 +26,14 @@ module.exports = {
     .journalChildIncludes(`"languageversion": "0.6.8+commit.0bbfe453"`)
   },
 
+  'Should compile using "compileWithParamaters" API with optimization On': function (browser: NightwatchBrowser) {
+    browser
+    .addFile('test_jsCompileWithOptimization.js', { content: jsCompileWithOptimization })
+    .executeScript('remix.exeCurrent()')
+    .pause(5000)
+    .journalChildIncludes(`\"optimizer\":{\"enabled\":true,\"runs\":300}`)
+  },
+
   'Should update the compiler configuration with "setCompilerConfig" API': function (browser: NightwatchBrowser) {
     browser
     .addFile('test_updateConfiguration.js', { content: updateConfiguration })
@@ -88,6 +96,26 @@ const jsCompile = `(async () => {
   }
 })()`
 
+const jsCompileWithOptimization = `(async () => {
+  try {
+      const contract = {
+          "storage.sol": {content : \`${simpleContract}\` }
+      }
+      console.log('compile')
+      const params = {
+          optimize: true,
+          runs: 300,
+          evmVersion: null,
+          language: 'Solidity',
+          version: '0.6.8+commit.0bbfe453'
+      }
+      const result = await remix.call('solidity', 'compileWithParameters', contract, params)
+      console.log('result ', result)
+  } catch (e) {
+      console.log(e.message)   
+  }
+})()`
+
 const updateConfiguration = `(async () => {
   try {    
       const params = {