Add tests for file size validator

spec/lib/file_size_validator_spec.rb

@@ -0,0 +1,48 @@
+require 'spec_helper'
+
+describe FileSizeValidator, lib: true do
+  let(:validator) { FileSizeValidator.new(options) }
+  let(:attachment) { CerfaUploader.new }
+  let(:note) { create(:cerfa) }
+
+  describe 'options uses an integer' do
+    let(:options) { { maximum: 10, attributes: { content: attachment } } }
+
+    it 'attachment exceeds maximum limit' do
+      allow(attachment).to receive(:size) { 100 }
+      validator.validate_each(note, :content, attachment)
+      expect(note.errors).to have_key(:content)
+    end
+
+    it 'attachment under maximum limit' do
+      allow(attachment).to receive(:size) { 1 }
+      validator.validate_each(note, :content, attachment)
+      expect(note.errors).not_to have_key(:content)
+    end
+  end
+
+  describe 'options uses a symbol' do
+    let(:options) do
+      {
+          maximum: :test,
+          attributes: { content: attachment }
+      }
+    end
+
+    before do
+      allow(note).to receive(:test) { 10 }
+    end
+
+    it 'attachment exceeds maximum limit' do
+      allow(attachment).to receive(:size) { 100 }
+      validator.validate_each(note, :content, attachment)
+      expect(note.errors).to have_key(:content)
+    end
+
+    it 'attachment under maximum limit' do
+      allow(attachment).to receive(:size) { 1 }
+      validator.validate_each(note, :content, attachment)
+      expect(note.errors).not_to have_key(:content)
+    end
+  end
+end