complete spec updates for RSpec 3 using only :expect syntax

spec/rscons/builders/disassemble_spec.rb

@@ -6,9 +6,9 @@ module Rscons
 
       it "supports overriding DISASM_CMD construction variable" do
         cache = "cache"
-        cache.stub(:up_to_date?) { false }
-        cache.stub(:mkdir_p) { }
-        cache.stub(:register_build) { }
+        allow(cache).to receive(:up_to_date?) { false }
+        allow(cache).to receive(:mkdir_p) { }
+        allow(cache).to receive(:register_build) { }
         expect(env).to receive(:execute).with("Disassemble a_file.txt", ["my_disasm", "a_file.exe"], anything).and_return(true)
         subject.run("a_file.txt", ["a_file.exe"], cache, env, "DISASM_CMD" => ["my_disasm", "${_SOURCES}"])
       end

spec/rscons/builders/object_spec.rb

@@ -6,11 +6,11 @@ module Rscons
 
       it "supports overriding CCCMD construction variable" do
         cache = "cache"
-        cache.stub(:up_to_date?) { false }
-        cache.stub(:mkdir_p) { }
-        cache.stub(:register_build) { }
-        FileUtils.stub(:rm_f) { }
-        File.stub(:exists?) { false }
+        allow(cache).to receive(:up_to_date?) { false }
+        allow(cache).to receive(:mkdir_p) { }
+        allow(cache).to receive(:register_build) { }
+        allow(FileUtils).to receive(:rm_f) { }
+        allow(File).to receive(:exists?) { false }
         expect(env).to receive(:execute).with("CC mod.o", ["llc", "mod.c"]).and_return(true)
         subject.run("mod.o", ["mod.c"], cache, env, "CCCMD" => ["llc", "${_SOURCES}"])
       end

spec/rscons/cache_spec.rb

@@ -1,11 +1,11 @@
 module Rscons
   describe Cache do
     before do
-      File.stub(:read) { nil }
+      allow(File).to receive(:read) { nil }
     end
 
     def build_from(cache)
-      JSON.stub(:load) do
+      allow(JSON).to receive(:load) do
         cache
       end
       Cache.instance.tap do |cache|
@@ -28,7 +28,7 @@ module Rscons
     describe "#clear" do
       it "removes the cache file" do
         expect(FileUtils).to receive(:rm_f).with(Cache::CACHE_FILE)
-        JSON.stub(:load) {{}}
+        allow(JSON).to receive(:load) {{}}
         Cache.instance.clear
       end
     end
@@ -47,7 +47,7 @@ module Rscons
     describe "#up_to_date?" do
       empty_env = "env"
       before do
-        empty_env.stub(:get_user_deps) { nil }
+        allow(empty_env).to receive(:get_user_deps) { nil }
       end
 
       it "returns false when target file does not exist" do

spec/rscons/environment_spec.rb

@@ -205,7 +205,7 @@ module Rscons
         cache = "cache"
         expect(Cache).to receive(:instance).and_return(cache)
         expect(cache).to receive(:clear_checksum_cache!)
-        env.stub(:run_builder) do |builder, target, sources, cache, vars|
+        allow(env).to receive(:run_builder) do |builder, target, sources, cache, vars|
           raise "Ruby exception thrown by builder"
         end
         expect(cache).to receive(:write)
@@ -349,11 +349,11 @@ module Rscons
             build_op[:vars]["CFLAGS"] += ["-O3", "-DSPECIAL"]
           end
         end
-        env.builders["Object"].stub(:run) do |target, sources, cache, env, vars|
+        allow(env.builders["Object"]).to receive(:run) do |target, sources, cache, env, vars|
           expect(vars["CFLAGS"]).to eq []
         end
         env.run_builder(env.builders["Object"], "build/normal/module.o", ["src/normal/module.c"], "cache", {})
-        env.builders["Object"].stub(:run) do |target, sources, cache, env, vars|
+        allow(env.builders["Object"]).to receive(:run) do |target, sources, cache, env, vars|
           expect(vars["CFLAGS"]).to eq ["-O3", "-DSPECIAL"]
         end
         env.run_builder(env.builders["Object"], "build/special/module.o", ["src/special/module.c"], "cache", {})