Remove a conflicting definition of runningAsTest.

lib/src/utils.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Generic utility functions. Stuff that should possibly be in core.
 library pub.utils;
 
 import 'dart:async';
 import "dart:convert";
 import 'dart:io';
@@ skipping 767 matching lines @@
     }
     return map;
   });
 }
 
 /// Whether "special" strings such as Unicode characters or color escapes are
 /// safe to use.
 ///
 /// On Windows or when not printing to a terminal, only printable ASCII
 /// characters should be used.
-bool get canUseSpecialChars => !runningAsTest &&
+bool get canUseSpecialChars => !runningFromTest && !runningAsTest &&
     Platform.operatingSystem != 'windows' &&
     stdioType(stdout) == StdioType.TERMINAL;
 
 /// Gets a "special" string (ANSI escape or Unicode).
 ///
 /// On Windows or when not printing to a terminal, returns something else since
 /// those aren't supported.
 String getSpecial(String special, [String onWindows = '']) =>
     canUseSpecialChars ? special : onWindows;
 
 /// Prepends each line in [text] with [prefix].
 ///
 /// If [firstPrefix] is passed, the first line is prefixed with that instead.
 String prefixLines(String text, {String prefix: '| ', String firstPrefix}) {
   var lines = text.split('\n');
   if (firstPrefix == null) {
     return lines.map((line) => '$prefix$line').join('\n');
   }
 
   var firstLine = "$firstPrefix${lines.first}";
   lines = lines.skip(1).map((line) => '$prefix$line').toList();
   lines.insert(0, firstLine);
   return lines.join('\n');
 }
 
-/// Whether pub is running as a subprocess in an integration test or in a unit
-/// test that has explicitly set this.
-bool runningAsTest = Platform.environment.containsKey('_PUB_TESTING');
-
 /// Whether today is April Fools' day.
 bool get isAprilFools {
   // Tests should never see April Fools' output.
-  if (runningAsTest) return false;
+  if (runningFromTest) return false;
 
   var date = new DateTime.now();
   return date.month == 4 && date.day == 1;
 }
 
 /// Wraps [fn] to guard against several different kinds of stack overflow
 /// exceptions:
 ///
 /// * A sufficiently long [Future] chain can cause a stack overflow if there are
 ///   no asynchronous operations in it (issue 9583).
@@ skipping 87 matching lines @@
   } else {
     throw new ApplicationException(message);
   }
 }
 
 /// Throw a [DataException] with [message] to indicate that the command has
 /// failed because of invalid input data.
 ///
 /// This will report the error and cause pub to exit with [exit_codes.DATA].
 void dataError(String message) => throw new DataException(message);