Add tests to repository

tests/ruby/cache_key.rb

@@ -0,0 +1,10 @@
+class Class2
+  def self.fun1()
+    value=if foo
+            bar
+          end
+  end
+
+  def self.fun2()
+  end
+end

tests/ruby/singleton.rb

@@ -0,0 +1,13 @@
+class Foo
+    def a
+    end
+
+    def b
+    end
+
+    def Foo.c(item)
+    end
+
+    def self.d
+    end
+end

tests/ruby/testcase.rb

@@ -0,0 +1,10 @@
+class Class1
+  def fun1()
+    foo = if bar
+            baz
+          end
+  end
+
+  def fun2()
+  end
+end