basic test for line length <= 78

spec/license_wrap_spec.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'word wrapping' do
+  Dir["#{licenses_path}/*.txt"].each do |file|
+    context "the #{File.basename(file, '.txt')} license" do
+      it 'does not wrap at line length 78' do
+        file_content = File.read(file, encoding: 'utf-8')
+        license_text = file_content.match(/\A(?:---\n.*\n---\n+)?(.*)/m)[1]
+        max_line_length = 0
+        max_line = ""
+        license_text.lines.each do |line|
+          if line.length > max_line_length
+            max_line_length = line.length
+            max_line = line
+          end
+        end
+        msg = "Longest line is #{max_line_length} characters: #{max_line}"
+        skip msg if max_line_length > 78 && max_line_length < 81
+        expect(max_line_length).to be <= 78, msg
+      end
+    end
+  end
+end