Test Subject;

tests/subject.lua

@@ -0,0 +1,90 @@
+describe('Subject', function()
+  describe('create', function()
+    it('returns a Subject', function()
+      expect(Rx.Subject.create()).to.be.an(Rx.Subject)
+    end)
+  end)
+
+  describe('subscribe', function()
+    it('returns a Subscription', function()
+      local subject = Rx.Subject.create()
+      local observer = Rx.Observer.create()
+      expect(subject:subscribe(observer)).to.be.an(Rx.Subscription)
+    end)
+
+    it('accepts 3 functions as arguments', function()
+      local onNext, onCompleted = spy(), spy()
+      local subject = Rx.Subject.create()
+      subject:subscribe(onNext, nil, onCompleted)
+      subject:onNext(5)
+      subject:onCompleted()
+      expect(onNext).to.equal({{5}})
+      expect(#onCompleted).to.equal(1)
+    end)
+  end)
+
+  describe('onNext', function()
+    it('pushes values to all subscribers', function()
+      local observers = {}
+      local spies = {}
+      for i = 1, 2 do
+        observers[i] = Rx.Observer.create()
+        spies[i] = spy(observers[i], '_onNext')
+      end
+
+      local subject = Rx.Subject.create()
+      subject:subscribe(observers[1])
+      subject:subscribe(observers[2])
+      subject:onNext(1)
+      subject:onNext(2)
+      subject:onNext(3)
+      expect(spies[1]).to.equal({{1}, {2}, {3}})
+      expect(spies[2]).to.equal({{1}, {2}, {3}})
+    end)
+
+    it('can be called using function syntax', function()
+      local observer = Rx.Observer.create()
+      local subject = Rx.Subject.create()
+      local onNext = spy(observer, 'onNext')
+      subject:subscribe(observer)
+      subject(4)
+      expect(#onNext).to.equal(1)
+    end)
+  end)
+
+  describe('onError', function()
+    it('pushes errors to all subscribers', function()
+      local observers = {}
+      local spies = {}
+      for i = 1, 2 do
+        observers[i] = Rx.Observer.create(nil, function() end, nil)
+        spies[i] = spy(observers[i], '_onError')
+      end
+
+      local subject = Rx.Subject.create()
+      subject:subscribe(observers[1])
+      subject:subscribe(observers[2])
+      subject:onError('ohno')
+      expect(spies[1]).to.equal({{'ohno'}})
+      expect(spies[2]).to.equal({{'ohno'}})
+    end)
+  end)
+
+  describe('onCompleted', function()
+    it('notifies all subscribers of completion', function()
+      local observers = {}
+      local spies = {}
+      for i = 1, 2 do
+        observers[i] = Rx.Observer.create(nil, function() end, nil)
+        spies[i] = spy(observers[i], '_onCompleted')
+      end
+
+      local subject = Rx.Subject.create()
+      subject:subscribe(observers[1])
+      subject:subscribe(observers[2])
+      subject:onCompleted()
+      expect(#spies[1]).to.equal(1)
+      expect(#spies[2]).to.equal(1)
+    end)
+  end)
+end)