remove Builder.features and Builder.produces?

spec/build_tests_spec.rb

@@ -1410,6 +1410,14 @@ EOF
       expect(result.stderr).to eq ""
       expect(lines(result.stdout)).to include "ar rcf lib.a build/e.1/one.o build/e.1/three.o build/e.1/two.o"
     end
+
+    it "allows passing object files as sources" do
+      test_dir("library")
+      result = run_rscons(rsconscript: "library_from_object.rb")
+      expect(result.stderr).to eq ""
+      expect(File.exists?("two.o")).to be_truthy
+      expect(lines(result.stdout)).to include "Building static library archive => lib.a"
+    end
   end
 
   context "SharedLibrary builder" do
@@ -1425,6 +1433,13 @@ EOF
         expect(slines).to include("Linking => libmine.so")
       end
     end
+
+    it "allows passing object files as sources" do
+      test_dir "shared_library"
+      result = run_rscons(rsconscript: "shared_library_from_object.rb")
+      expect(result.stderr).to eq ""
+      expect(File.exists?("one.o"))
+    end
   end
 
   context "multi-threading" do

spec/rscons/environment_spec.rb

@@ -233,27 +233,5 @@ module Rscons
         expect {env.__send__(:find_finished_thread, false)}.to raise_error /No threads to wait for/
       end
     end
-
-    describe "#features_met?" do
-      it "returns true when the builder provides all requested features" do
-        builder = Struct.new(:features).new(%w[shared other])
-        expect(subject.__send__(:features_met?, builder, %w[shared])).to be_truthy
-      end
-
-      it "returns true when no features are requested" do
-        builder = Struct.new(:features).new([])
-        expect(subject.__send__(:features_met?, builder, [])).to be_truthy
-      end
-
-      it "returns false when a builder does not provide a requested feature" do
-        builder = Struct.new(:features).new(%w[shared other])
-        expect(subject.__send__(:features_met?, builder, %w[other2])).to be_falsey
-      end
-
-      it "returns false when a builder provides a feature that is not desired" do
-        builder = Struct.new(:features).new(%w[shared other])
-        expect(subject.__send__(:features_met?, builder, %w[-shared])).to be_falsey
-      end
-    end
   end
 end