Spy::Instance#instead - initial test cases

test/instead_test.rb

@@ -0,0 +1,34 @@
+require 'test_helper'
+
+class InsteadTest < Minitest::Spec
+  describe 'Spy::Instance#instead' do
+    after do
+      Spy.restore(:all)
+    end
+
+    it 'will run the instead block and not the original call' do
+      o = Object.new
+      o.instance_eval do
+        def incr; @total ||= 0; @total += 1; end
+        def total; @total; end
+        def total=(n); @total = n; end
+      end
+
+      Spy.on(o, :incr).instead do |mc|
+        mc.receiver.total += 2
+      end
+
+      o.incr
+
+      assert_equal 2, o.total
+    end
+
+    it 'will return the value returned by the block' do
+      fail
+    end
+
+    it 'plays nicely with Spy::Instance#when' do
+      fail
+    end
+  end
+end