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# frozen_string_literal: true
RSpec.describe FaradayMiddleware::EncodeJson do
let(:middleware) { described_class.new(->(env) { env }) }
def process(body, content_type = nil)
env = { body: body, request_headers: Faraday::Utils::Headers.new }
env[:request_headers]['content-type'] = content_type if content_type
middleware.call(faraday_env(env))
end
def result_body
result[:body]
end
def result_type
result[:request_headers]['content-type']
end
context 'no body' do
let(:result) { process(nil) }
it "doesn't change body" do
expect(result_body).to be_nil
end
it "doesn't add content type" do
expect(result_type).to be_nil
end
end
context 'empty body' do
let(:result) { process('') }
it "doesn't change body" do
expect(result_body).to be_empty
end
it "doesn't add content type" do
expect(result_type).to be_nil
end
end
context 'string body' do
let(:result) { process('{"a":1}') }
it "doesn't change body" do
expect(result_body).to eq('{"a":1}')
end
it 'adds content type' do
expect(result_type).to eq('application/json')
end
end
context 'object body' do
let(:result) { process(a: 1) }
it 'encodes body' do
expect(result_body).to eq('{"a":1}')
end
it 'adds content type' do
expect(result_type).to eq('application/json')
end
end
context 'empty object body' do
let(:result) { process({}) }
it 'encodes body' do
expect(result_body).to eq('{}')
end
end
context 'object body with json type' do
let(:result) { process({ a: 1 }, 'application/json; charset=utf-8') }
it 'encodes body' do
expect(result_body).to eq('{"a":1}')
end
it "doesn't change content type" do
expect(result_type).to eq('application/json; charset=utf-8')
end
end
context 'object body with vendor json type' do
let(:result) { process({ a: 1 }, 'application/vnd.myapp.v1+json; charset=utf-8') }
it 'encodes body' do
expect(result_body).to eq('{"a":1}')
end
it "doesn't change content type" do
expect(result_type).to eq('application/vnd.myapp.v1+json; charset=utf-8')
end
end
context 'object body with incompatible type' do
let(:result) { process({ a: 1 }, 'application/xml; charset=utf-8') }
it "doesn't change body" do
expect(result_body).to eq(a: 1)
end
it "doesn't change content type" do
expect(result_type).to eq('application/xml; charset=utf-8')
end
end
end
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