Auto merge of #5278 - bundler:seg-worker-thread-creation-failure, r=indirect

[Worker] Fail gracefully when creating threads fails

1 files changed, 22 insertions, 0 deletions

diff --git a/spec/bundler/worker_spec.rb b/spec/bundler/worker_spec.rb
new file mode 100644
index 00000000..786778b0
--- /dev/null
+++ b/spec/bundler/worker_spec.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+require "spec_helper"
+require "bundler/worker"
+
+describe Bundler::Worker do
+  let(:size) { 5 }
+  let(:name) { "Spec Worker" }
+  let(:function) { proc {|object, worker_number| [object, worker_number] } }
+  subject { described_class.new(size, name, function) }
+
+  after { subject.stop }
+
+  describe "#initialize" do
+    context "when Thread.start raises ThreadError" do
+      it "raises when no threads can be created" do
+        allow(Thread).to receive(:start).and_raise(ThreadError, "error creating thread")
+
+        expect { subject.enq "a" }.to raise_error(Bundler::ThreadCreationError, "Failed to create threads for the Spec Worker worker: error creating thread")
+      end
+    end
+  end
+end