support detecting Travis CI in iOS Simulator

.travis.yml

@@ -2,6 +2,6 @@ language: objective-c
 os: osx
 osx_image: xcode7
 xcode_workspace: Volkswagen.xcworkspace
-xcode_scheme: VolksWagen-iOS
+xcode_scheme: Volkswagen-iOS
 
-script: xcodebuild -workspace VolksWagen.xcworkspace -scheme Volkswagen-OSX -sdk macosx test
+script: xcodebuild -workspace Volkswagen.xcworkspace -scheme Volkswagen-iOS -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=latest' test

README.md

@@ -1,4 +1,5 @@
 #Volkswagen for Xcode
+[![Build Status](https://travis-ci.org/cezheng/Volkswagen-Xcode.svg)](https://travis-ci.org/cezheng/Volkswagen-Xcode)
 Volkswagen for Xcode makes failing test cases pass in CI servers.
 
 This project is inspired by [volkswagen
@@ -53,7 +54,7 @@ Pure Objective-C projects using Cocoapods should have lower requirements since t
 ### Manually include the source
 - I have tested this yet, but this should work with almost all versions of OS in recent years
 
-> Currently using `Volkswagen-Xcode` on iOS has some problems detecting the enviroment variables from the outside shell. I'm working to resolve this problem.
+> Currently using `Volkswagen-Xcode` on iOS only supports Travis CI. More CI environment detection is yet to come. Keep an eye on this [issue](https://github.com/cezheng/Volkswagen-Xcode/issues/1).
 
 #Installation
 ##CocoaPods

Volkswagen/NSException+Volkswagen.m

@@ -25,6 +25,16 @@
 @interface NSException (Volkswagen)
 @end
 
+#if TARGET_IPHONE_SIMULATOR
+static BOOL is_in_ci() {
+  NSString *tmpDir = @(getenv("TMPDIR"));
+  // Travis CI
+  if ([tmpDir hasPrefix:@"/Users/travis"]) {
+    return true;
+  }
+  return false;
+}
+#else
 static BOOL is_in_ci() {
   return getenv("CI")
   || getenv("CONTINUOUS_INTEGRATION")
@@ -40,9 +50,10 @@ static BOOL is_in_ci() {
   || getenv("GOCD_SERVER_HOST")
   || getenv("BUILDKITE");
 }
+#endif
 
 static void do_nothing() {
-
+  
 }
 
 @implementation NSException (Volkswagen)
@@ -67,4 +78,3 @@ + (void)load {
 }
 
 @end
-