1 files changed, 84 insertions, 0 deletions
diff --git a/spec/bundler/bundler/plugin/api_spec.rb b/spec/bundler/bundler/plugin/api_spec.rb
new file mode 100644
index 0000000000..e40b9adb0f
--- /dev/null
+++ b/spec/bundler/bundler/plugin/api_spec.rb
@@ -0,0 +1,84 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+RSpec.describe Bundler::Plugin::API do
+  context "plugin declarations" do
+    before do
+      stub_const "UserPluginClass", Class.new(Bundler::Plugin::API)
+    end
+
+    describe "#command" do
+      it "declares a command plugin with same class as handler" do
+        expect(Bundler::Plugin).
+          to receive(:add_command).with("meh", UserPluginClass).once
+
+        UserPluginClass.command "meh"
+      end
+
+      it "accepts another class as argument that handles the command" do
+        stub_const "NewClass", Class.new
+        expect(Bundler::Plugin).to receive(:add_command).with("meh", NewClass).once
+
+        UserPluginClass.command "meh", NewClass
+      end
+    end
+
+    describe "#source" do
+      it "declares a source plugin with same class as handler" do
+        expect(Bundler::Plugin).
+          to receive(:add_source).with("a_source", UserPluginClass).once
+
+        UserPluginClass.source "a_source"
+      end
+
+      it "accepts another class as argument that handles the command" do
+        stub_const "NewClass", Class.new
+        expect(Bundler::Plugin).to receive(:add_source).with("a_source", NewClass).once
+
+        UserPluginClass.source "a_source", NewClass
+      end
+    end
+
+    describe "#hook" do
+      it "accepts a block and passes it to Plugin module" do
+        foo = double("tester")
+        expect(foo).to receive(:called)
+
+        expect(Bundler::Plugin).to receive(:add_hook).with("post-foo").and_yield
+
+        Bundler::Plugin::API.hook("post-foo") { foo.called }
+      end
+    end
+  end
+
+  context "bundler interfaces provided" do
+    before do
+      stub_const "UserPluginClass", Class.new(Bundler::Plugin::API)
+    end
+
+    subject(:api) { UserPluginClass.new }
+
+    # A test of delegation
+    it "provides the Bundler's functions" do
+      expect(Bundler).to receive(:an_unkown_function).once
+
+      api.an_unkown_function
+    end
+
+    it "includes Bundler::SharedHelpers' functions" do
+      expect(Bundler::SharedHelpers).to receive(:an_unkown_helper).once
+
+      api.an_unkown_helper
+    end
+
+    context "#tmp" do
+      it "provides a tmp dir" do
+        expect(api.tmp("mytmp")).to be_directory
+      end
+
+      it "accepts multiple names for suffix" do
+        expect(api.tmp("myplugin", "download")).to be_directory
+      end
+    end
+  end
+end