1 files changed, 81 insertions, 0 deletions
diff --git a/spec/bundler/plugins/command_spec.rb b/spec/bundler/plugins/command_spec.rb
new file mode 100644
index 0000000000..6ad782b758
--- /dev/null
+++ b/spec/bundler/plugins/command_spec.rb
@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+RSpec.describe "command plugins" do
+  before do
+    build_repo2 do
+      build_plugin "command-mah" do |s|
+        s.write "plugins.rb", <<-RUBY
+          module Mah
+            class Plugin < Bundler::Plugin::API
+              command "mahcommand" # declares the command
+
+              def exec(command, args)
+                puts "MahHello"
+              end
+            end
+          end
+        RUBY
+      end
+    end
+
+    bundle "plugin install command-mah --source file://#{gem_repo2}"
+  end
+
+  it "executes without arguments" do
+    expect(out).to include("Installed plugin command-mah")
+
+    bundle "mahcommand"
+    expect(out).to eq("MahHello")
+  end
+
+  it "accepts the arguments" do
+    build_repo2 do
+      build_plugin "the-echoer" do |s|
+        s.write "plugins.rb", <<-RUBY
+          module Resonance
+            class Echoer
+              # Another method to declare the command
+              Bundler::Plugin::API.command "echo", self
+
+              def exec(command, args)
+                puts "You gave me \#{args.join(", ")}"
+              end
+            end
+          end
+        RUBY
+      end
+    end
+
+    bundle "plugin install the-echoer --source file://#{gem_repo2}"
+    expect(out).to include("Installed plugin the-echoer")
+
+    bundle "echo tacos tofu lasange", "no-color" => false
+    expect(out).to eq("You gave me tacos, tofu, lasange")
+  end
+
+  it "raises error on redeclaration of command" do
+    build_repo2 do
+      build_plugin "copycat" do |s|
+        s.write "plugins.rb", <<-RUBY
+          module CopyCat
+            class Cheater < Bundler::Plugin::API
+              command "mahcommand", self
+
+              def exec(command, args)
+              end
+            end
+          end
+        RUBY
+      end
+    end
+
+    bundle "plugin install copycat --source file://#{gem_repo2}"
+
+    expect(out).not_to include("Installed plugin copycat")
+
+    expect(out).to include("Failed to install plugin")
+
+    expect(out).to include("Command(s) `mahcommand` declared by copycat are already registered.")
+  end
+end