https://git.ruby-lang.org/ruby.git/commit/?id=154c2717da

From 154c2717da6bb59f1b2739777b01cea98b667751 Mon Sep 17 00:00:00 2001
From: Frank Lam <ryzingsun11@y...>
Date: Sat, 23 May 2020 01:00:00 +0800
Subject: [rubygems/rubygems] Add user hint specs for bundle gem --test

https://github.com/rubygems/rubygems/commit/1d2292a88f

diff --git a/lib/bundler/cli/gem.rb b/lib/bundler/cli/gem.rb
index 57fc635..2c2ed27 100644
--- a/lib/bundler/cli/gem.rb
+++ b/lib/bundler/cli/gem.rb
@@ -181,7 +181,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/cli/gem.rb#L181
       if options[:test] == Bundler.settings["gem.test"]
         Bundler.ui.info "Bundler is configured to generate test files for #{Bundler.settings["gem.test"]}, "\
                         "so -t is not needed if you want to continue using it. " \
-                        "This setting can be changed anytime with bundle config gem.test."
+                        "This setting can be changed anytime with `bundle config gem.test`."
       end
     rescue Errno::EEXIST => e
       raise GenericSystemCallError.new(e, "There was a conflict while creating the new gem.")
@@ -222,7 +222,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/cli/gem.rb#L222
       if test_framework.to_s.empty?
         Bundler.ui.confirm "Do you want to generate tests with your gem?"
         result = Bundler.ui.ask "Type 'rspec', 'minitest' or 'test-unit' to generate those test files now. \n" \
-                                "#{test_framework_help_info} rspec/minitest/test-unit/(none):"
+                                "#{test_framework_hint} rspec/minitest/test-unit/(none):"
         if result =~ /rspec|minitest|test-unit/
           test_framework = result
         else
@@ -237,12 +237,12 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/cli/gem.rb#L237
       test_framework
     end
 
-    def test_framework_help_info
+    def test_framework_hint
       if Bundler.settings["gem.test"] == false
         "Your choice will only be applied to this gem."
       else
-        "Future bundle gem calls will use your choice. " \
-        "This setting can be changed anytime with bundle config gem.test."
+        "Future `bundle gem` calls will use your choice. " \
+        "This setting can be changed anytime with `bundle config gem.test`."
       end
     end
 
diff --git a/spec/bundler/commands/newgem_spec.rb b/spec/bundler/commands/newgem_spec.rb
index fcefa4d..4b7a88b 100644
--- a/spec/bundler/commands/newgem_spec.rb
+++ b/spec/bundler/commands/newgem_spec.rb
@@ -623,18 +623,32 @@ RSpec.describe "bundle gem" do https://github.com/ruby/ruby/blob/trunk/spec/bundler/commands/newgem_spec.rb#L623
         expect(bundled_app("#{gem_name}/spec/spec_helper.rb")).to exist
       end
 
+      it "hints that --test is not needed" do
+        hint = "Bundler is configured to generate test files for rspec, "\
+               "so -t is not needed if you want to continue using it. " \
+               "This setting can be changed anytime with `bundle config gem.test`."
+        expect(last_command.stdout).to match(hint)
+      end
+
       it_behaves_like "test framework is present"
     end
 
     context "gem.test setting set to false and --test with no arguments" do
       before do
         bundle "config set gem.test false"
+        bundle! "gem #{gem_name} --test"
       end
 
       it "asks to generate test files" do
-        result = bundle! "gem #{gem_name} --test"
-        expect(result).to match("Do you want to generate tests with your gem?")
+        expect(last_command.stdout).to match("Do you want to generate tests with your gem?")
+      end
+
+      it "hints that the choice will only be applied to the current gem" do
+        hint = "Your choice will only be applied to this gem."
+        expect(last_command.stdout).to match(hint)
       end
+
+      it_behaves_like "test framework is absent"
     end
 
     context "gem.test setting not set and --test with no arguments" do
@@ -642,6 +656,12 @@ RSpec.describe "bundle gem" do https://github.com/ruby/ruby/blob/trunk/spec/bundler/commands/newgem_spec.rb#L656
         bundle! "gem #{gem_name} --test"
       end
 
+      it "hints that the choice will be applied to future bundle gem calls" do
+        hint = "Future `bundle gem` calls will use your choice. " \
+               "This setting can be changed anytime with `bundle config gem.test`."
+        expect(last_command.stdout).to match(hint)
+      end
+
       it_behaves_like "test framework is absent"
     end
 
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