Remove global directory switching from specstests/less_flakyness

`Dir.chdir` is not thread safe, so it makes our parallel specs flaky.
Instead, use the following alternatives:

* Use `:chdir` parameter to `Open3` methods for specs that shell out.
* Stub `find_gemfile` or other relevant helpers for unit tests.

1 files changed, 3 insertions, 0 deletions

diff --git a/spec/plugins/source_spec.rb b/spec/plugins/source_spec.rb
index c8deee96b1..14643e5c81 100644
--- a/spec/plugins/source_spec.rb
+++ b/spec/plugins/source_spec.rb
@@ -21,6 +21,7 @@ RSpec.describe "bundler source plugin" do
         end
       G
 
+      allow(Bundler::SharedHelpers).to receive(:find_gemfile).and_return(bundled_app_gemfile)
       plugin_should_be_installed("bundler-source-psource")
     end
 
@@ -75,6 +76,7 @@ RSpec.describe "bundler source plugin" do
         end
 
         it "installs the explicit one" do
+          allow(Bundler::SharedHelpers).to receive(:find_gemfile).and_return(bundled_app_gemfile)
           plugin_should_be_installed("another-psource")
         end
 
@@ -100,6 +102,7 @@ RSpec.describe "bundler source plugin" do
         end
 
         it "installs the default one" do
+          allow(Bundler::SharedHelpers).to receive(:find_gemfile).and_return(bundled_app_gemfile)
           plugin_should_be_installed("bundler-source-psource")
         end
       end