feat(util): Allow more verbose logging with multiple sessions (angula…

…r#2985). (angular#3499)

docs/referenceConf.js

@@ -200,6 +200,13 @@ exports.config = {
   // Use a number less than 1 to denote unlimited. Default is unlimited.
   maxSessions: -1,
 
+  // Whether or not to buffer output when running tests on multiple browsers
+  // in parallel. By default, when running multiple browser sessions, the
+  // results are buffered and not logged until the test run finishes. If true,
+  // when running multiple sessions in parallel results will be logged when each
+  // test finishes.
+  verboseMultiSessions: false,
+
   // ---------------------------------------------------------------------------
   // ----- Global test information ---------------------------------------------
   // ---------------------------------------------------------------------------

lib/config.ts

@@ -309,6 +309,15 @@ export interface Config {
      */
     maxSessions?: number;
 
+    /**
+     * Whether or not to buffer output when running tests on multiple browsers
+     * in parallel. By default, when running multiple browser sessions, the
+     * results are buffered and not logged until the test run finishes. If true,
+     * when running multiple sessions in parallel results will be logged when
+     * each test finishes.
+     */
+    verboseMultiSessions?: boolean;
+
     // ---------------------------------------------------------------------------
     // ----- Global test information
     // ---------------------------------------------

lib/configParser.ts

@@ -28,6 +28,7 @@ export class ConfigParser {
     this.config_ = {
       specs: [],
       multiCapabilities: [],
+      verboseMultiSessions: false,
       rootElement: 'body',
       allScriptsTimeout: 11000,
       getPageTimeout: 10000,

lib/taskLogger.ts

@@ -32,14 +32,23 @@ export class TaskLogger {
   }
 
   /**
-   * Flushes the buffer to stdout.
+   * Prints the contents of the buffer without clearing it.
    */
-  public flush(): void {
+  public peek(): void {
     if (this.buffer) {
       // Flush buffer if nonempty
       logger.info(os.EOL + '------------------------------------' + os.EOL);
       logger.info(this.buffer);
       logger.info(os.EOL);
+    }
+  }
+
+  /**
+   * Flushes the buffer to stdout.
+   */
+  public flush(): void {
+    if (this.buffer) {
+      this.peek();
       this.buffer = '';
     }
   }

lib/taskRunner.ts

@@ -53,6 +53,17 @@ export class TaskRunner extends EventEmitter {
       specResults: []
     };
 
+    let configParser = new ConfigParser();
+    if (this.configFile) {
+      configParser.addFileConfig(this.configFile);
+    }
+    if (this.additionalConfig) {
+      configParser.addConfig(this.additionalConfig);
+    }
+    let config = configParser.getConfig();
+    config.capabilities = this.task.capabilities;
+    config.specs = this.task.specs;
+
     if (this.runInFork) {
       let deferred = q.defer();
 
@@ -72,6 +83,9 @@ export class TaskRunner extends EventEmitter {
       childProcess
           .on('message',
               (m: any) => {
+                if (config.verboseMultiSessions) {
+                  taskLogger.peek();
+                }
                 switch (m.event) {
                   case 'testPass':
                     process.stdout.write('.');
@@ -106,17 +120,6 @@ export class TaskRunner extends EventEmitter {
 
       return deferred.promise;
     } else {
-      let configParser = new ConfigParser();
-      if (this.configFile) {
-        configParser.addFileConfig(this.configFile);
-      }
-      if (this.additionalConfig) {
-        configParser.addConfig(this.additionalConfig);
-      }
-      let config = configParser.getConfig();
-      config.capabilities = this.task.capabilities;
-      config.specs = this.task.specs;
-
       let runner = new Runner(config);
 
       runner.on('testsDone', (results: RunResults) => {