Jasmine beforeEach functions get called for each nested example

gistfile1.txt

describe "setup", =>
  @val = 0
  beforeEach => @val += 10
  afterEach => @val -= 100

  describe "when loaded", =>
    it "a", => expect(this.val).toEqual 10
    it "b", => expect(this.val).toEqual 10
    it "c", => expect(this.val).toEqual 10

Check it in tryjasmine.com and notice that there are failure. The beforeEach block is running more times than you might expect.