如何使用karma + Jasmine加载外部Json文件进行angularJS测试？/

Can anyone provide me an example in PLUNKER that how to load JSON file for karma/jasmine test.I want to read the data from JSON file for the test cases i am writing.I have been searching but nowhere they mentioned clear example on how to do it? I appreciate it if anyone can provide with the example.Can anyone provide me an example in PLUNKER tha