Merge #7418

7418: Restore previous BUNDLE_GEMFILE in bundler/inline r=deivid-rodriguez a=fatkodima

[Without spacing changes](https://github.com/bundler/bundler/pull/7418/files?w=1)

Closes #7159 

Co-authored-by: fatkodima <fatkodima123@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/spec/runtime/inline_spec.rb b/spec/runtime/inline_spec.rb
index afb9c3d180..94d8b086a2 100644
--- a/spec/runtime/inline_spec.rb
+++ b/spec/runtime/inline_spec.rb
@@ -316,4 +316,21 @@ RSpec.describe "bundler/inline#gemfile" do
 
     expect(err).to be_empty
   end
+
+  it "preserves previous BUNDLE_GEMFILE value" do
+    ENV["BUNDLE_GEMFILE"] = ""
+    script <<-RUBY
+      gemfile do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "rack"
+      end
+
+      puts "BUNDLE_GEMFILE is empty" if ENV["BUNDLE_GEMFILE"].empty?
+      system("#{Gem.ruby} -w -e '42'") # this should see original value of BUNDLE_GEMFILE
+      exit $?.exitstatus
+    RUBY
+
+    expect(last_command).to be_success
+    expect(out).to include("BUNDLE_GEMFILE is empty")
+  end
 end