[rubygems/rubygems] Avoid to use Base64 library because I have a plan…

… to base64 gem to bundled gems in ruby/ruby.

rubygems/rubygems@221797cfd1

test/rubygems/test_gem_request.rb

@@ -3,7 +3,6 @@
 require_relative "helper"
 require "rubygems/request"
 require "ostruct"
-require "base64"
 
 unless Gem::HAVE_OPENSSL
   warn "Skipping Gem::Request tests.  openssl not found."
@@ -21,6 +20,12 @@ def make_request(uri, request_class, last_modified, proxy)
     Gem::Request.create_with_proxy uri, request_class, last_modified, proxy
   end
 
+  # This method is same code as Base64.encode64
+  # We should not use Base64.encode64 because we need to avoid gem activation.
+  def base64_encode64(bin)
+    [bin].pack("m")
+  end
+
   def setup
     @proxies = %w[http_proxy https_proxy HTTP_PROXY http_proxy_user HTTP_PROXY_USER http_proxy_pass HTTP_PROXY_PASS no_proxy NO_PROXY]
     @old_proxies = @proxies.map {|k| ENV[k] }
@@ -209,7 +214,7 @@ def test_fetch_basic_auth
     end
 
     auth_header = conn.payload["Authorization"]
-    assert_equal "Basic #{Base64.encode64("user:pass")}".strip, auth_header
+    assert_equal "Basic #{base64_encode64("user:pass")}".strip, auth_header
     assert_includes @ui.output, "GET https://user:REDACTED@example.rubygems/specs.#{Gem.marshal_version}"
   end
 
@@ -226,7 +231,7 @@ def test_fetch_basic_auth_encoded
     end
 
     auth_header = conn.payload["Authorization"]
-    assert_equal "Basic #{Base64.encode64("user:{DEScede}pass")}".strip, auth_header
+    assert_equal "Basic #{base64_encode64("user:{DEScede}pass")}".strip, auth_header
     assert_includes @ui.output, "GET https://user:REDACTED@example.rubygems/specs.#{Gem.marshal_version}"
   end
 
@@ -243,7 +248,7 @@ def test_fetch_basic_oauth_encoded
     end
 
     auth_header = conn.payload["Authorization"]
-    assert_equal "Basic #{Base64.encode64("{DEScede}pass:x-oauth-basic")}".strip, auth_header
+    assert_equal "Basic #{base64_encode64("{DEScede}pass:x-oauth-basic")}".strip, auth_header
     assert_includes @ui.output, "GET https://REDACTED:x-oauth-basic@example.rubygems/specs.#{Gem.marshal_version}"
   end