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|
# frozen_string_literal: true
require 'spec_helper'
describe TemplateEngines::LiquidService do
describe '#render' do
let(:template) { 'up{env={{ci_environment_slug}}}' }
let(:result) { subject }
let_it_be(:slug) { 'env_slug' }
let_it_be(:context) do
{
ci_environment_slug: slug,
environment_filter: "container_name!=\"POD\",environment=\"#{slug}\""
}
end
subject { described_class.new(template).render(context) }
it 'with symbol keys in context it substitutes variables' do
expect(result).to include("up{env=#{slug}")
end
context 'with multiple occurrences of variable in template' do
let(:template) do
'up{env1={{ci_environment_slug}},env2={{ci_environment_slug}}}'
end
it 'substitutes variables' do
expect(result).to eq("up{env1=#{slug},env2=#{slug}}")
end
end
context 'with multiple variables in template' do
let(:template) do
'up{env={{ci_environment_slug}},' \
'{{environment_filter}}}'
end
it 'substitutes all variables' do
expect(result).to eq(
"up{env=#{slug}," \
"container_name!=\"POD\",environment=\"#{slug}\"}"
)
end
end
context 'with unknown variables in template' do
let(:template) { 'up{env={{env_slug}}}' }
it 'does not substitute unknown variables' do
expect(result).to eq("up{env=}")
end
end
context 'with extra variables in context' do
let(:template) { 'up{env={{ci_environment_slug}}}' }
it 'substitutes variables' do
# If context has only 1 key, there is no need for this spec.
expect(context.count).to be > 1
expect(result).to eq("up{env=#{slug}}")
end
end
context 'with unknown and known variables in template' do
let(:template) { 'up{env={{ci_environment_slug}},other_env={{env_slug}}}' }
it 'substitutes known variables' do
expect(result).to eq("up{env=#{slug},other_env=}")
end
end
context 'Liquid errors' do
shared_examples 'raises RenderError' do |message|
it do
expect { result }.to raise_error(described_class::RenderError, message)
end
end
context 'when liquid raises error' do
let(:template) { 'up{env={{ci_environment_slug}}' }
let(:liquid_template) { Liquid::Template.new }
before do
allow(Liquid::Template).to receive(:parse).with(template).and_return(liquid_template)
allow(liquid_template).to receive(:render!).and_raise(exception, message)
end
context 'raises Liquid::MemoryError' do
let(:exception) { Liquid::MemoryError }
let(:message) { 'Liquid error: Memory limits exceeded' }
it_behaves_like 'raises RenderError', 'Memory limit exceeded while rendering template'
end
context 'raises Liquid::Error' do
let(:exception) { Liquid::Error }
let(:message) { 'Liquid error: Generic error message' }
it_behaves_like 'raises RenderError', 'Error rendering query'
end
end
context 'with template that is expensive to render' do
let(:template) do
'{% assign loop_count = 1000 %}'\
'{% assign padStr = "0" %}'\
'{% assign number_to_pad = "1" %}'\
'{% assign strLength = number_to_pad | size %}'\
'{% assign padLength = loop_count | minus: strLength %}'\
'{% if padLength > 0 %}'\
' {% assign padded = number_to_pad %}'\
' {% for position in (1..padLength) %}'\
' {% assign padded = padded | prepend: padStr %}'\
' {% endfor %}'\
' {{ padded }}'\
'{% endif %}'
end
it_behaves_like 'raises RenderError', 'Memory limit exceeded while rendering template'
end
end
end
end
|
