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/has_errors_spec.rb

@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+require 'has_errors'
+
+describe HasErrors do
+
+  class ErrorTestClass
+    include HasErrors
+  end
+
+  let(:error_test) { ErrorTestClass.new }
+  let(:title_error) { "Title can't be blank" }
+
+  # No title is invalid
+  let(:invalid_topic) { Fabricate.build(:topic, title: '') }
+
+  it "has no errors by default" do
+    expect(error_test.errors).to be_blank
+  end
+
+  context "validate_child" do
+    it "adds the errors from invalid AR objects" do
+      expect(error_test.validate_child(invalid_topic)).to eq(false)
+      expect(error_test.errors).to be_present
+      expect(error_test.errors[:base]).to include(title_error)
+    end
+
+    it "doesn't add the errors from valid AR objects" do
+      topic = Fabricate.build(:topic)
+      expect(error_test.validate_child(topic)).to eq(true)
+      expect(error_test.errors).to be_blank
+    end
+  end
+
+  context "rollback_from_errors!" do
+    it "triggers a rollback" do
+      invalid_topic.valid?
+
+      expect(-> { error_test.rollback_from_errors!(invalid_topic) }).to raise_error(ActiveRecord::Rollback)
+      expect(error_test.errors).to be_present
+      expect(error_test.errors[:base]).to include(title_error)
+    end
+  end
+
+  context "rollback_with_error!" do
+    it "triggers a rollback" do
+
+      expect(-> {
+        error_test.rollback_with!(invalid_topic, :too_many_users)
+      }).to raise_error(ActiveRecord::Rollback)
+      expect(error_test.errors).to be_present
+      expect(error_test.errors[:base]).to include("You can only send warnings to one user at a time.")
+    end
+  end
+
+end