From bab809d98f2a0a8a23efd62df750beccbf1b35d9 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Fri, 3 Mar 2023 16:30:39 +0900
Subject: [PATCH] [rubygems/rubygems] Introduce
 Gem::Specification.find_by_full_name for finding conbination of name and
 version for gemspec

https://github.com/rubygems/rubygems/commit/0430551215
---
 lib/rubygems/specification.rb           |  6 ++++++
 test/rubygems/test_gem_specification.rb | 17 +++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index 01798fb8a2..d4640c12f0 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -1021,6 +1021,12 @@ class Gem::Specification < Gem::BasicSpecification
     Gem::Dependency.new(name, *requirements).to_spec
   end
 
+  ##
+  # Find the best specification matching a +full_name+.
+  def self.find_by_full_name(full_name)
+    stubs.find {|s| s.full_name == full_name }&.to_spec
+  end
+
   ##
   # Return the best specification that contains the file matching +path+.
 
diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index 1952192aba..56ca7acaf2 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -3726,6 +3726,23 @@ end
     assert Gem::Specification.find_by_name "b", ">1"
   end
 
+  def test_find_by_full_name
+    pl = Gem::Platform.new "x86_64-linux"
+
+    a = util_spec "a", "1"
+    install_specs a
+
+    a_pl = util_spec("a", "1") {|s| s.platform = pl }
+    install_specs a_pl
+
+    assert_equal a, Gem::Specification.find_by_full_name("a-1")
+    assert_equal a_pl, Gem::Specification.find_by_full_name("a-1-x86_64-linux")
+
+    assert_nil Gem::Specification.find_by_full_name("a-2")
+    assert_nil Gem::Specification.find_by_full_name("b-1")
+    assert_nil Gem::Specification.find_by_full_name("a-1-arm64-linux")
+  end
+
   def test_find_by_path
     a = util_spec "foo", "1", nil, "lib/foo.rb"