Merge bundler to standard libraries.

  rubygems 2.7.x depends bundler-1.15.x. This is preparation for
  rubygems and bundler migration.

  * lib/bundler.rb, lib/bundler/*: files of bundler-1.15.4
  * spec/bundler/*: rspec examples of bundler-1.15.4. I applied patches.
    * https://github.com/bundler/bundler/pull/6007
    * Exclude not working examples on ruby repository.
    * Fake ruby interpriter instead of installed ruby.
  * Makefile.in: Added test task named `test-bundler`. This task is only
    working macOS/linux yet. I'm going to support Windows environment later.
  * tool/sync_default_gems.rb: Added sync task for bundler.

  [Feature #12733][ruby-core:77172]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 42 insertions, 0 deletions

diff --git a/spec/bundler/bundler/ui_spec.rb b/spec/bundler/bundler/ui_spec.rb
new file mode 100644
index 0000000000..fc76eb1ee7
--- /dev/null
+++ b/spec/bundler/bundler/ui_spec.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+RSpec.describe Bundler::UI do
+  describe Bundler::UI::Silent do
+    it "has the same instance methods as Shell", :ruby => ">= 1.9" do
+      shell = Bundler::UI::Shell
+      methods = proc do |cls|
+        cls.instance_methods.map do |i|
+          m = shell.instance_method(i)
+          [i, m.parameters]
+        end.sort_by(&:first)
+      end
+      expect(methods.call(described_class)).to eq(methods.call(shell))
+    end
+
+    it "has the same instance class as Shell", :ruby => ">= 1.9" do
+      shell = Bundler::UI::Shell
+      methods = proc do |cls|
+        cls.methods.map do |i|
+          m = shell.method(i)
+          [i, m.parameters]
+        end.sort_by(&:first)
+      end
+      expect(methods.call(described_class)).to eq(methods.call(shell))
+    end
+  end
+
+  describe Bundler::UI::Shell do
+    let(:options) { {} }
+    subject { described_class.new(options) }
+    describe "debug?" do
+      it "returns a boolean" do
+        subject.level = :debug
+        expect(subject.debug?).to eq(true)
+
+        subject.level = :error
+        expect(subject.debug?).to eq(false)
+      end
+    end
+  end
+end