Close #2054 - prefer XDG_* paths (if set)

References #2054

Using XDG_* paths (if set) with preference higher than the
home dir, for pry config and history files.

Testing: ran `bundle exec rspec`, observed the tests pass.

2 files changed, 26 insertions, 8 deletions

diff --git a/spec/config_spec.rb b/spec/config_spec.rb
index d42d4d1e..d2cda05e 100644
--- a/spec/config_spec.rb
+++ b/spec/config_spec.rb
@@ -67,18 +67,31 @@ RSpec.describe Pry::Config do
     end
 
     context "when $XDG_CONFIG_HOME is defined" do
-      before do
-        allow(File).to receive(:exist?)
-        expect(File).to receive(:exist?)
-          .with(File.expand_path('~/.pryrc')).and_return(false)
+      before { ENV['XDG_CONFIG_HOME'] = '/xdg_home' }
+      after { ENV.delete('XDG_CONFIG_HOME') }
+
+      context "when ~/.pryrc exists" do
+        before do
+          allow(File).to receive(:exist?)
+          expect(File).to receive(:exist?)
+            .with(File.expand_path('~/.pryrc')).and_return(true)
+        end
 
-        ENV['XDG_CONFIG_HOME'] = '/xdg_home'
+        it "defaults $XDG_CONFIG_HOME/pry/pryrc" do
+          expect(subject.rc_file).to eq('/xdg_home/pry/pryrc')
+        end
       end
 
-      after { ENV.delete('XDG_CONFIG_HOME') }
+      context "when ~/.pryrc doesn't exist" do
+        before do
+          allow(File).to receive(:exist?)
+          expect(File).to receive(:exist?)
+            .with(File.expand_path('~/.pryrc')).and_return(false)
+        end
 
-      it "defaults $XDG_CONFIG_HOME/pry/pryrc" do
-        expect(subject.rc_file).to eq('/xdg_home/pry/pryrc')
+        it "defaults $XDG_CONFIG_HOME/pry/pryrc" do
+          expect(subject.rc_file).to eq('/xdg_home/pry/pryrc')
+        end
       end
     end
   end
diff --git a/spec/history_spec.rb b/spec/history_spec.rb
index bc3de4dd..5cf63f72 100644
--- a/spec/history_spec.rb
+++ b/spec/history_spec.rb
@@ -53,6 +53,11 @@ RSpec.describe Pry::History do
         stub_hist has_default: false, xdg_home: '/my/path'
         expect(described_class.default_file).to eq('/my/path/pry/pry_history')
       end
+
+      it "returns config location relative to $XDG_DATA_HOME when ~/.pryrc exists" do
+        stub_hist has_default: true, xdg_home: '/my/path'
+        expect(described_class.default_file).to eq('/my/path/pry/pry_history')
+      end
     end
   end