Fixed cacert location (#8)

Rakefile

@@ -36,11 +36,11 @@ namespace :build do
   desc "Download cacert.pem"
   task :download_cacert do
     url = URI("https://curl.se/ca/cacert.pem")
-    FileUtils.mkdir_p("cert")
+    FileUtils.mkdir_p("lib/cert")
     Net::HTTP.start(url.host, url.port, use_ssl: url.scheme == "https") do |http|
       request = Net::HTTP::Get.new url
       http.request request do |response|
-        open "cert/cacert.pem.mozilla", "w" do |io|
+        open "lib/cert/cacert.pem.mozilla", "w" do |io|
           response.read_body do |chunk|
             io.write chunk
           end

spec/runtime_spec.rb

@@ -151,6 +151,9 @@ def tmpdir_name
   end
 
   it "provides an adapter for net/http gem" do
+    TebakoRuntime.send(:remove_const, :COMPILER_MEMFS)
+    TebakoRuntime::COMPILER_MEMFS = File.join(TebakoRuntime.full_gem_path("tebako-runtime"), "lib")
+
     tfile = File.join(TebakoRuntime.full_gem_path("tebako-runtime"), "lib", "cert", "cacert.pem.mozilla")
     expect(TebakoRuntime).to receive(:extract_memfs).with(tfile).and_call_original
     require "net/http"
@@ -162,7 +165,7 @@ def tmpdir_name
 
     http.use_ssl = true
 
-    expect(http.ca_file).to eq(tfile)
+    expect(http.ca_file).to eq(File.join(TebakoRuntime::COMPILER_MEMFS_LIB_CACHE, "cacert.pem.mozilla"))
     expect(http.verify_mode).to eq(OpenSSL::SSL::VERIFY_PEER)
   end