Load files in xcode unit tests

Question

I have an Xcode 5 unit test project and some test xml files related to it. I've tried a bunch of approaches but I can't seem to load the xml files.

I've tried the following which does not work

NSData* nsData = [NSData dataWithContentsOfFile:@"TestResource/TestData.xml"];

NSString* fileString = [NSString stringWithContentsOfFile:@"TestData.xml" encoding:NSUTF8StringEncoding error:&error];

Also if I try to preview all the bundles using [NSBundle allBundles] the unit test bundle does not appear in the list?

I tried to create a separate resource bundle and I can't seem to locate it programmatically although it does get built and deployed.

What am I doing wrong ?

Answer 1

When running tests the application bundle is still the main bundle. You need to use unit tests bundle.

Objective C:

NSBundle *bundle = [NSBundle bundleForClass:[self class]]; NSString *path = [bundle pathForResource:@"TestData" ofType:@"xml"]; NSData *xmlData = [NSData dataWithContentsOfFile:path]; 

Swift 2:

let bundle = NSBundle(forClass: self.dynamicType) let path = bundle.pathForResource("TestData", ofType: "xml")! let xmlData = NSData(contentsOfFile: path) 

Swift 3 and up:

let bundle = Bundle(for: type(of: self)) let path = bundle.path(forResource: "TestData", ofType: "xml")! let xmlData = NSData(contentsOfFile: path)  

Answer 2

With swift Swift 3 the syntax self.dynamicType has been deprecated, use this instead

let testBundle = Bundle(for: type(of: self)) guard let ressourceURL = testBundle.url(forResource: "TestData", ofType: "xml") else {     // file does not exist     return } do {     let ressourceData = try Data(contentsOf: ressourceURL) } catch let error {     // some error occurred when reading the file } 

or

guard let ressourceURL = testBundle.url(forResource: "TestData", withExtension: "xml") 

Answer 3

As stated in this answer:

When the unit test harness runs your code, your unit test bundle is NOT the main bundle. Even though you are running tests, not your application, your application bundle is still the main bundle.

If you use following code, then your code will search the bundle that your unit test class is in, and everything will be fine.

Objective C:

NSBundle *bundle = [NSBundle bundleForClass:[self class]];
NSString *path = [bundle pathForResource:@"TestData" ofType:@"xml"];
NSData *xmlData = [NSData dataWithContentsOfFile:path];

Swift:

let bundle = NSBundle(forClass: self.dynamicType)
if let path = bundle.pathForResource("TestData", ofType: "xml")
{
    let xmlData = NSData(contentsOfFile: path)
}