move clean logic to Application

spec/rscons/application_spec.rb

@@ -1,6 +1,31 @@
 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
+
     describe ".determine_n_threads" do
       context "when specified by environment variable" do
         before(:each) do