working on Environment specs

lib/rscons/environment.rb

@@ -89,8 +89,6 @@ module Rscons
 
     # Return the file name to be built from source_fname with suffix suffix.
     # This method takes into account the Environment's build directories.
-    # It also creates any parent directories needed to be able to open and
-    # write to the output file.
     def get_build_fname(source_fname, suffix)
       build_fname = source_fname.set_suffix(suffix).gsub('\\', '/')
       @build_dirs.each do |src_dir, obj_dir|

spec/rscons/environment_spec.rb

@@ -1,5 +1,35 @@
 module Rscons
   describe Environment do
+    describe "#initialize" do
+      it "stores the construction variables passed in" do
+        env = Environment.new("CFLAGS" => ["-g"], "CPPPATH" => ["dir"])
+        env["CFLAGS"].should == ["-g"]
+        env["CPPPATH"].should == ["dir"]
+      end
+
+      it "adds the default builders when they are not excluded" do
+        env = Environment.new
+        env.builders.size.should be > 0
+        env.builders.map {|name, builder| builder.is_a?(Builder)}.all?.should be_true
+        env.builders.find {|name, builder| name == "Object"}.should_not be_nil
+        env.builders.find {|name, builder| name == "Program"}.should_not be_nil
+        env.builders.find {|name, builder| name == "Library"}.should_not be_nil
+      end
+
+      it "excludes the default builders with exclude_builders: :all" do
+        env = Environment.new(exclude_builders: :all)
+        env.builders.size.should == 0
+      end
+
+      it "excludes the named builders" do
+        env = Environment.new(exclude_builders: ["Library"])
+        env.builders.size.should be > 0
+        env.builders.find {|name, builder| name == "Object"}.should_not be_nil
+        env.builders.find {|name, builder| name == "Program"}.should_not be_nil
+        env.builders.find {|name, builder| name == "Library"}.should be_nil
+      end
+    end
+
     describe "#clone" do
       it 'should create unique copies of each construction variable' do
         env = Environment.new
@@ -11,6 +41,92 @@ module Rscons
       end
     end
 
+    describe "#add_builder" do
+      it "adds the builder to the list of builders" do
+        env = Environment.new(exclude_builders: :all)
+        env.builders.keys.should == []
+        env.add_builder(Rscons::Object.new)
+        env.builders.keys.should == ["Object"]
+      end
+    end
+
+    describe "#get_build_fname" do
+      context "with no build directories" do
+        it "returns the name of the source file with suffix changed" do
+          env = Environment.new
+          env.get_build_fname("src/dir/file.c", ".o").should == "src/dir/file.o"
+          env.get_build_fname("src\\dir\\other.d", ".a").should == "src/dir/other.a"
+          env.get_build_fname("source.cc", ".o").should == "source.o"
+        end
+      end
+
+      context "with build directories" do
+        it "uses the build directories to create the output file name" do
+          env = Environment.new
+          env.build_dir("src", "bld")
+          env.build_dir(%r{^libs/([^/]+)}, 'build/libs/\1')
+          env.get_build_fname("src/input.cc", ".o").should == "bld/input.o"
+          env.get_build_fname("libs/lib1/some/file.c", ".o").should == "build/libs/lib1/some/file.o"
+          env.get_build_fname("libs/otherlib/otherlib.cc", ".o").should == "build/libs/otherlib/otherlib.o"
+          env.get_build_fname("other_directory/o.d", ".a").should == "other_directory/o.a"
+        end
+      end
+    end
+
+    describe "#[]" do
+      it "allows reading construction variables" do
+        env = Environment.new("CFLAGS" => ["-g", "-Wall"])
+        env["CFLAGS"].should == ["-g", "-Wall"]
+      end
+    end
+
+    describe "#[]=" do
+      it "allows writing construction variables" do
+        env = Environment.new("CFLAGS" => ["-g", "-Wall"])
+        env["CFLAGS"] -= ["-g"]
+        env["CFLAGS"] += ["-O3"]
+        env["CFLAGS"].should == ["-Wall", "-O3"]
+        env["other_var"] = "val33"
+        env["other_var"].should == "val33"
+      end
+    end
+
+    describe "#append" do
+      it "allows adding many construction variables at once" do
+        env = Environment.new("CFLAGS" => ["-g"], "CPPPATH" => ["inc"])
+        env.append("CFLAGS" => ["-Wall"], "CPPPATH" => ["include"])
+        env["CFLAGS"].should == ["-Wall"]
+        env["CPPPATH"].should == ["include"]
+      end
+    end
+
+    describe "#process" do
+      it "runs builders for all of the targets specified" do
+        env = Environment.new
+        env.Program("a.out", "main.c")
+
+        cache = "cache"
+        Cache.should_receive(:new).and_return(cache)
+        env.should_receive(:run_builder).with(anything, "a.out", ["main.c"], cache, {}).and_return(true)
+        cache.should_receive(:write)
+
+        env.process
+      end
+
+      it "raises a BuildError when building fails" do
+        env = Environment.new
+        env.Program("a.out", "main.o")
+        env.Object("main.o", "other.cc")
+
+        cache = "cache"
+        Cache.should_receive(:new).and_return(cache)
+        env.should_receive(:run_builder).with(anything, "main.o", ["other.cc"], cache, {}).and_return(false)
+        cache.should_receive(:write)
+
+        expect { env.process }.to raise_error BuildError, /Failed.to.build.a\.out/
+      end
+    end
+
     describe ".parse_makefile_deps" do
       it 'handles dependencies on one line' do
         File.should_receive(:read).with('makefile').and_return(<<EOS)