1 files changed, 30 insertions, 1 deletions
diff --git a/spec/bundler/cache/gems_spec.rb b/spec/bundler/cache/gems_spec.rb
index 2f5da4e7e4..73c7db1e88 100644
--- a/spec/bundler/cache/gems_spec.rb
+++ b/spec/bundler/cache/gems_spec.rb
@@ -289,11 +289,24 @@ RSpec.describe "bundle cache" do
       expect(cached_gem("rack-1.0.0")).to exist
     end
 
-    it "raises an error when the gem file is altered and produces a different checksum" do
+    it "raises an error when the gem is altered and produces a different checksum" do
       cached_gem("rack-1.0.0").rmtree
       build_gem "rack", "1.0.0", :path => bundled_app("vendor/cache")
+
+      checksums = checksums_section do |c|
+        c.checksum gem_repo1, "rack", "1.0.0"
+      end
+
       simulate_new_machine
 
+      lockfile <<-L
+        GEM
+          remote: #{file_uri_for(gem_repo2)}/
+          specs:
+            rack (1.0.0)
+        #{checksums}
+      L
+
       bundle :install, :raise_on_error => false
       expect(exitstatus).to eq(37)
       expect(err).to include("Bundler found mismatched checksums.")
@@ -305,6 +318,22 @@ RSpec.describe "bundle cache" do
       expect(cached_gem("rack-1.0.0")).to exist
     end
 
+    it "installs a modified gem with a non-matching checksum when checksums is not opted in" do
+      cached_gem("rack-1.0.0").rmtree
+      build_gem "rack", "1.0.0", :path => bundled_app("vendor/cache")
+      simulate_new_machine
+
+      lockfile <<-L
+        GEM
+          remote: #{file_uri_for(gem_repo2)}/
+          specs:
+            rack (1.0.0)
+      L
+
+      bundle :install
+      expect(cached_gem("rack-1.0.0")).to exist
+    end
+
     it "handles directories and non .gem files in the cache" do
       bundled_app("vendor/cache/foo").mkdir
       File.open(bundled_app("vendor/cache/bar"), "w") {|f| f.write("not a gem") }