nil check + test

Author: NullVoxPopuli

lib/jsonapi/parse.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'json'
 
 module JSONAPI
@@ -11,6 +12,7 @@ module JSONAPI
   #   objects in the primary data must have an id
   # @return [JSON::API::Document]
   def parse(document, options = {})
+    raise InvalidDocument, 'document cannot be nil' if document.nil?
     hash = document.is_a?(Hash) ? document : JSON.parse(document)
 
     Document.new(hash, options)

spec/parser_spec.rb

@@ -94,4 +94,10 @@
     expect(document.data.first.relationships.author.data.to_hash).to eq @author_data_hash
     expect(document.data.first.relationships.comments.data.map(&:to_hash)).to eq @comments_data_hash
   end
+
+  it 'raises InvalidDocument on nil input' do
+    expect {
+      JSONAPI.parse(nil)
+    }.to raise_error JSONAPI::InvalidDocument
+  end
 end