Fix bundle console specs

The previous specs only worked by accident, because the error message
"Couldn't load pry\nCould not find constant IRB\n" contained both of
the strings expected by the assertions.

In order to test loading an alternate console without adding a permanent
dependency, we can use a fake pry gem that implements the minimum
required api.

2 files changed, 49 insertions, 4 deletions

diff --git a/spec/commands/console_spec.rb b/spec/commands/console_spec.rb
index f26fbcdba5..4b1de42e8a 100644
--- a/spec/commands/console_spec.rb
+++ b/spec/commands/console_spec.rb
@@ -18,14 +18,26 @@ describe "bundle console" do
     expect(out).to include("0.9.1")
   end
 
+  it "uses IRB as default console" do
+    bundle "console" do |input|
+      input.puts("__method__")
+      input.puts("exit")
+    end
+    expect(out).to include(":irb_binding")
+  end
+
   it "starts another REPL if configured as such" do
+    install_gemfile <<-G
+      source "file://#{gem_repo1}"
+      gem "pry"
+    G
     bundle "config console pry"
 
     bundle "console" do |input|
-      input.puts("__callee__")
+      input.puts("__method__")
       input.puts("exit")
     end
-    expect(out).to include("pry")
+    expect(out).to include(":__pry__")
   end
 
   it "falls back to IRB if the other REPL isn't available" do
@@ -33,10 +45,10 @@ describe "bundle console" do
     # make sure pry isn't there
 
     bundle "console" do |input|
-      input.puts("__callee__")
+      input.puts("__method__")
       input.puts("exit")
     end
-    expect(out).to include("IRB")
+    expect(out).to include(":irb_binding")
   end
 
   it "doesn't load any other groups" do
diff --git a/spec/support/builders.rb b/spec/support/builders.rb
index 95b4b6eb59..913263c51d 100644
--- a/spec/support/builders.rb
+++ b/spec/support/builders.rb
@@ -242,6 +242,39 @@ module Spec
         end
 
         build_gem "foo"
+
+        # A minimal fake pry console
+        build_gem "pry" do |s|
+          s.write "lib/pry.rb", <<-RUBY
+            class Pry
+              class << self
+                def toplevel_binding
+                  unless defined?(@toplevel_binding) && @toplevel_binding
+                    TOPLEVEL_BINDING.eval %{
+                      def self.__pry__; binding; end
+                      Pry.instance_variable_set(:@toplevel_binding, __pry__)
+                      class << self; undef __pry__; end
+                    }
+                  end
+                  @toplevel_binding.eval('private')
+                  @toplevel_binding
+                end
+
+                def __pry__
+                  while line = gets
+                    begin
+                      puts eval(line, toplevel_binding).inspect.sub(/^"(.*)"$/, '=> \\1')
+                    rescue Exception => e
+                      puts "\#{e.class}: \#{e.message}"
+                      puts e.backtrace.first
+                    end
+                  end
+                end
+                alias start __pry__
+              end
+            end
+          RUBY
+        end
       end
     end