a clean operation should preserve install target cache info - close #101

spec/rscons/application_spec.rb

@@ -1,30 +0,0 @@
-module Rscons
-  describe Application do
-
-    describe ".clean" do
-      it "removes all build targets and created directories" do
-        cache = "cache"
-        expect(Rscons::Cache).to receive(:instance).and_return(cache)
-        expect(cache).to receive(:targets).and_return(["build/a.out", "build/main.o"])
-        expect(FileUtils).to receive(:rm_f).with("build/a.out")
-        expect(FileUtils).to receive(:rm_f).with("build/main.o")
-        expect(cache).to receive(:directories).and_return(["build/one", "build/one/two", "build", "other"])
-        expect(File).to receive(:directory?).with("build/one/two").and_return(true)
-        expect(Dir).to receive(:entries).with("build/one/two").and_return([".", ".."])
-        expect(Dir).to receive(:rmdir).with("build/one/two")
-        expect(File).to receive(:directory?).with("build/one").and_return(true)
-        expect(Dir).to receive(:entries).with("build/one").and_return([".", ".."])
-        expect(Dir).to receive(:rmdir).with("build/one")
-        expect(File).to receive(:directory?).with("build").and_return(true)
-        expect(Dir).to receive(:entries).with("build").and_return([".", ".."])
-        expect(Dir).to receive(:rmdir).with("build")
-        expect(File).to receive(:directory?).with("other").and_return(true)
-        expect(Dir).to receive(:entries).with("other").and_return([".", "..", "other.file"])
-        expect(cache).to receive(:clear)
-
-        Rscons.application.__send__(:clean)
-      end
-    end
-
-  end
-end