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require 'spec_helper'
describe CacheMarkdownField do
CacheMarkdownField::CACHING_CLASSES << "ThingWithMarkdownFields"
# The minimum necessary ActiveModel to test this concern
class ThingWithMarkdownFields
include ActiveModel::Model
include ActiveModel::Dirty
include ActiveModel::Serialization
class_attribute :attribute_names
self.attribute_names = []
def attributes
attribute_names.each_with_object({}) do |name, hsh|
hsh[name.to_s] = send(name)
end
end
extend ActiveModel::Callbacks
define_model_callbacks :save
include CacheMarkdownField
cache_markdown_field :foo
cache_markdown_field :baz, pipeline: :single_line
def self.add_attr(attr_name)
self.attribute_names += [attr_name]
define_attribute_methods(attr_name)
attr_reader(attr_name)
define_method("#{attr_name}=") do |val|
send("#{attr_name}_will_change!") unless val == send(attr_name)
instance_variable_set("@#{attr_name}", val)
end
end
[:foo, :foo_html, :bar, :baz, :baz_html].each do |attr_name|
add_attr(attr_name)
end
def initialize(*)
super
# Pretend new is load
clear_changes_information
end
def save
run_callbacks :save do
changes_applied
end
end
end
CacheMarkdownField::CACHING_CLASSES.delete("ThingWithMarkdownFields")
def thing_subclass(new_attr)
Class.new(ThingWithMarkdownFields) { add_attr(new_attr) }
end
let(:markdown) { "`Foo`" }
let(:html) { "<p><code>Foo</code></p>" }
let(:updated_markdown) { "`Bar`" }
let(:updated_html) { "<p dir=\"auto\"><code>Bar</code></p>" }
subject { ThingWithMarkdownFields.new(foo: markdown, foo_html: html) }
describe ".attributes" do
it "excludes cache attributes" do
expect(thing_subclass(:qux).new.attributes.keys.sort).to eq(%w[bar baz foo qux])
end
end
describe ".cache_markdown_field" do
it "refuses to allow untracked classes" do
expect { thing_subclass(:qux).__send__(:cache_markdown_field, :qux) }.to raise_error(RuntimeError)
end
end
context "an unchanged markdown field" do
before do
subject.foo = subject.foo
subject.save
end
it { expect(subject.foo).to eq(markdown) }
it { expect(subject.foo_html).to eq(html) }
it { expect(subject.foo_html_changed?).not_to be_truthy }
end
context "a changed markdown field" do
before do
subject.foo = updated_markdown
subject.save
end
it { expect(subject.foo_html).to eq(updated_html) }
end
context "a non-markdown field changed" do
before do
subject.bar = "OK"
subject.save
end
it { expect(subject.bar).to eq("OK") }
it { expect(subject.foo).to eq(markdown) }
it { expect(subject.foo_html).to eq(html) }
end
describe '#banzai_render_context' do
it "sets project to nil if the object lacks a project" do
context = subject.banzai_render_context(:foo)
expect(context).to have_key(:project)
expect(context[:project]).to be_nil
end
it "excludes author if the object lacks an author" do
context = subject.banzai_render_context(:foo)
expect(context).not_to have_key(:author)
end
it "raises if the context for an unrecognised field is requested" do
expect{subject.banzai_render_context(:not_found)}.to raise_error(ArgumentError)
end
it "includes the pipeline" do
context = subject.banzai_render_context(:baz)
expect(context[:pipeline]).to eq(:single_line)
end
it "returns copies of the context template" do
template = subject.cached_markdown_fields[:baz]
copy = subject.banzai_render_context(:baz)
expect(copy).not_to be(template)
end
context "with a project" do
subject { thing_subclass(:project).new(foo: markdown, foo_html: html, project: :project) }
it "sets the project in the context" do
context = subject.banzai_render_context(:foo)
expect(context).to have_key(:project)
expect(context[:project]).to eq(:project)
end
it "invalidates the cache when project changes" do
subject.project = :new_project
allow(Banzai::Renderer).to receive(:cacheless_render_field).and_return(updated_html)
subject.save
expect(subject.foo_html).to eq(updated_html)
expect(subject.baz_html).to eq(updated_html)
end
end
context "with an author" do
subject { thing_subclass(:author).new(foo: markdown, foo_html: html, author: :author) }
it "sets the author in the context" do
context = subject.banzai_render_context(:foo)
expect(context).to have_key(:author)
expect(context[:author]).to eq(:author)
end
it "invalidates the cache when author changes" do
subject.author = :new_author
allow(Banzai::Renderer).to receive(:cacheless_render_field).and_return(updated_html)
subject.save
expect(subject.foo_html).to eq(updated_html)
expect(subject.baz_html).to eq(updated_html)
end
end
end
end
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