create Builder instance for each build operation - close #88

spec/rscons/builders/simple_builder_spec.rb

@@ -3,15 +3,8 @@ module Rscons
     describe SimpleBuilder do
       let(:env) {Environment.new}
 
-      it "should create a new builder with the given name (as a symbol) and action" do
-        builder = Rscons::Builders::SimpleBuilder.new(:Foo) { 0x1234 }
-        expect(builder.name).to eq("Foo")
-        expect(builder.run(1,2,3,4,5)).to eq(0x1234)
-      end
-
-      it "should create a new builder with the given name (as a string) and action" do
-        builder = Rscons::Builders::SimpleBuilder.new("Foo") { 0x1234 }
-        expect(builder.name).to eq("Foo")
+      it "should create a new builder with the given action" do
+        builder = Rscons::Builders::SimpleBuilder.new { 0x1234 }
         expect(builder.run(1,2,3,4,5)).to eq(0x1234)
       end
     end

spec/rscons/environment_spec.rb

@@ -4,7 +4,7 @@ module Rscons
       it "adds the default builders when they are not excluded" do
         env = Environment.new
         expect(env.builders.size).to be > 0
-        expect(env.builders.map {|name, builder| builder.is_a?(Builder)}.all?).to be_truthy
+        expect(env.builders.map {|name, builder| builder.is_a?(Class)}.all?).to be_truthy
         expect(env.builders.find {|name, builder| name == "Object"}).to_not be_nil
         expect(env.builders.find {|name, builder| name == "Program"}).to_not be_nil
         expect(env.builders.find {|name, builder| name == "Library"}).to_not be_nil
@@ -52,7 +52,7 @@ module Rscons
       it "adds the builder to the list of builders" do
         env = Environment.new(exclude_builders: true)
         expect(env.builders.keys).to eq []
-        env.add_builder(Rscons::Builders::Object.new)
+        env.add_builder(Rscons::Builders::Object)
         expect(env.builders.keys).to eq ["Object"]
       end