Add a spec for not double-eval'ing a Gemfile

1 files changed, 25 insertions, 0 deletions

diff --git a/spec/install/gemfile/lockfile_spec.rb b/spec/install/gemfile/lockfile_spec.rb
new file mode 100644
index 0000000000..5d8c6de316
--- /dev/null
+++ b/spec/install/gemfile/lockfile_spec.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+describe "bundle install with a lockfile present" do
+  let(:gf) { <<-G }
+    source "file://#{gem_repo1}"
+
+    gem "rack", "1.0.0"
+  G
+
+  before do
+    install_gemfile(gf)
+  end
+
+  context "gemfile evaluation" do
+    let(:gf) { super() + "\n\n File.open('evals', 'a') {|f| f << %(1\n) }" }
+    it "does not evaluate the gemfile twice" do
+      bundle! :install
+
+      # The first eval is from the initial install, we're testing that the
+      # second install doesn't double-eval
+      expect(bundled_app("evals").read.lines.size).to eq(2)
+    end
+  end
+end