DEV: Move spec/components to spec/lib (#15987)

Lib specs were inexplicably split into two directories (`lib` and `components`)

This moves them all into `lib`.

spec/lib/discourse_event_spec.rb

@@ -0,0 +1,107 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe DiscourseEvent do
+
+  describe "#events" do
+    it "defaults to {}" do
+      begin
+        original_events = DiscourseEvent.events
+        DiscourseEvent.instance_variable_set(:@events, nil)
+        expect(DiscourseEvent.events).to eq({})
+      ensure
+        DiscourseEvent.instance_variable_set(:@events, original_events)
+      end
+    end
+
+    describe "key value" do
+      it "defaults to an empty set" do
+        expect(DiscourseEvent.events["event42"]).to eq(Set.new)
+      end
+    end
+  end
+
+  context 'when calling events' do
+
+    let(:harvey) {
+      OpenStruct.new(
+        name: 'Harvey Dent',
+        job: 'District Attorney'
+      )
+    }
+
+    let(:event_handler) do
+      Proc.new { |user| user.name = 'Two Face' }
+    end
+
+    before do
+      DiscourseEvent.on(:acid_face, &event_handler)
+    end
+
+    after do
+      DiscourseEvent.off(:acid_face, &event_handler)
+    end
+
+    context 'when event does not exist' do
+
+      it "does not raise an error" do
+        DiscourseEvent.trigger(:missing_event)
+      end
+
+    end
+
+    context 'when single event exists' do
+
+      it "doesn't raise an error" do
+        DiscourseEvent.trigger(:acid_face, harvey)
+      end
+
+      it "changes the name" do
+        DiscourseEvent.trigger(:acid_face, harvey)
+        expect(harvey.name).to eq('Two Face')
+      end
+
+    end
+
+    context 'when multiple events exist' do
+
+      let(:event_handler_2) do
+        Proc.new { |user| user.job = 'Supervillain' }
+      end
+
+      before do
+        DiscourseEvent.on(:acid_face, &event_handler_2)
+        DiscourseEvent.trigger(:acid_face, harvey)
+      end
+
+      after do
+        DiscourseEvent.off(:acid_face, &event_handler_2)
+      end
+
+      it 'triggers both events' do
+        expect(harvey.job).to eq('Supervillain')
+        expect(harvey.name).to eq('Two Face')
+      end
+    end
+
+    context '#all_off' do
+
+      let(:event_handler_2) do
+        Proc.new { |user| user.job = 'Supervillain' }
+      end
+
+      before do
+        DiscourseEvent.on(:acid_face, &event_handler_2)
+      end
+
+      it 'removes all handlers with a key' do
+        harvey.job = 'gardening'
+        DiscourseEvent.all_off(:acid_face)
+        DiscourseEvent.trigger(:acid_face, harvey) # Doesn't change anything
+        expect(harvey.job).to eq('gardening')
+      end
+
+    end
+  end
+end