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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Banzai::Filter::References::ReferenceFilter do
let(:project) { build_stubbed(:project) }
describe '#each_node' do
it 'iterates over the nodes in a document' do
document = Nokogiri::HTML.fragment('<a href="foo">foo</a>')
filter = described_class.new(document, project: project)
expect { |b| filter.each_node(&b) }
.to yield_with_args(an_instance_of(Nokogiri::XML::Element))
end
it 'returns an Enumerator when no block is given' do
document = Nokogiri::HTML.fragment('<a href="foo">foo</a>')
filter = described_class.new(document, project: project)
expect(filter.each_node).to be_an_instance_of(Enumerator)
end
it 'skips links with a "gfm" class' do
document = Nokogiri::HTML.fragment('<a href="foo" class="gfm">foo</a>')
filter = described_class.new(document, project: project)
expect { |b| filter.each_node(&b) }.not_to yield_control
end
it 'skips text nodes in pre elements' do
document = Nokogiri::HTML.fragment('<pre>foo</pre>')
filter = described_class.new(document, project: project)
expect { |b| filter.each_node(&b) }.not_to yield_control
end
end
describe '#nodes' do
it 'returns an Array of the HTML nodes' do
document = Nokogiri::HTML.fragment('<a href="foo">foo</a>')
filter = described_class.new(document, project: project)
expect(filter.nodes).to eq([document.children[0]])
end
end
RSpec.shared_context 'document nodes' do
let(:document) { Nokogiri::HTML.fragment('<p data-sourcepos="1:1-1:18"></p>') }
let(:nodes) { [] }
let(:filter) { described_class.new(document, project: project) }
let(:ref_pattern) { nil }
let(:href_link) { nil }
before do
nodes.each do |node|
document.children.first.add_child(node)
end
end
end
RSpec.shared_context 'new nodes' do
let(:nodes) { [{ value: "1" }, { value: "2" }, { value: "3" }] }
let(:expected_nodes) { [{ value: "1.1" }, { value: "1.2" }, { value: "1.3" }, { value: "2.1" }, { value: "2.2" }, { value: "2.3" }, { value: "3.1" }, { value: "3.2" }, { value: "3.3" }] }
let(:new_nodes) do
{
0 => [{ value: "1.1" }, { value: "1.2" }, { value: "1.3" }],
2 => [{ value: "3.1" }, { value: "3.2" }, { value: "3.3" }],
1 => [{ value: "2.1" }, { value: "2.2" }, { value: "2.3" }]
}
end
end
RSpec.shared_examples 'replaces text' do |method_name, index|
let(:args) { [filter.nodes[index], index, ref_pattern || href_link].compact }
context 'when content didnt change' do
it 'does not replace link node with html' do
filter.send(method_name, *args) do
existing_content
end
expect(filter).not_to receive(:replace_text_with_html)
end
end
context 'when link node has changed' do
let(:html) { %(text <a href="reference_url" class="gfm gfm-user" title="reference">Reference</a>) }
it 'replaces reference node' do
filter.send(method_name, *args) do
html
end
expect(document.css('a').length).to eq 1
end
it 'calls replace_and_update_new_nodes' do
expect(filter).to receive(:replace_and_update_new_nodes).with(filter.nodes[index], index, html)
filter.send(method_name, *args) do
html
end
end
it 'stores filtered new nodes' do
filter.send(method_name, *args) do
html
end
expect(filter.instance_variable_get(:@new_nodes)).to eq({ index => [filter.each_node.to_a[index]] })
end
end
end
RSpec.shared_examples 'replaces document node' do |method_name|
context 'when parent has only one node' do
let(:nodes) { [node] }
it_behaves_like 'replaces text', method_name, 0
end
context 'when parent has multiple nodes' do
let(:node1) { Nokogiri::HTML.fragment('<span>span text</span>') }
let(:node2) { Nokogiri::HTML.fragment('<span>text</span>') }
context 'when pattern matches in the first node' do
let(:nodes) { [node, node1, node2] }
it_behaves_like 'replaces text', method_name, 0
end
context 'when pattern matches in the middle node' do
let(:nodes) { [node1, node, node2] }
it_behaves_like 'replaces text', method_name, 1
end
context 'when pattern matches in the last node' do
let(:nodes) { [node1, node2, node] }
it_behaves_like 'replaces text', method_name, 2
end
end
end
describe '#replace_text_when_pattern_matches' do
include_context 'document nodes'
let(:node) { Nokogiri::HTML.fragment('text @reference') }
let(:ref_pattern) { %r{(?<!\w)@(?<user>[a-zA-Z0-9_\-.]*)}x }
context 'when node has no reference pattern' do
let(:node) { Nokogiri::HTML.fragment('random text') }
let(:nodes) { [node] }
it 'skips node' do
expect { |b| filter.send(:replace_text_when_pattern_matches, filter.nodes[0], 0, ref_pattern, &b) }.not_to yield_control
end
end
it_behaves_like 'replaces document node', :replace_text_when_pattern_matches do
let(:existing_content) { node.to_html }
end
end
describe '#replace_link_node_with_text' do
include_context 'document nodes'
let(:node) { Nokogiri::HTML.fragment('<a>end text</a>') }
it_behaves_like 'replaces document node', :replace_link_node_with_text do
let(:existing_content) { node.text }
end
end
describe '#replace_link_node_with_href' do
include_context 'document nodes'
let(:node) { Nokogiri::HTML.fragment('<a href="link">end text</a>') }
let(:href_link) { CGI.unescape(node.attr('href').to_s) }
it_behaves_like 'replaces document node', :replace_link_node_with_href do
let(:existing_content) { href_link }
end
end
describe '#call_and_update_nodes' do
include_context 'new nodes'
let(:document) { Nokogiri::HTML.fragment('<a href="foo">foo</a>') }
let(:filter) { described_class.new(document, project: project) }
it 'updates all new nodes', :aggregate_failures do
filter.instance_variable_set('@nodes', nodes)
expect(filter).to receive(:call) { filter.instance_variable_set('@new_nodes', new_nodes) }
expect(filter).to receive(:with_update_nodes).and_call_original
expect(filter).to receive(:update_nodes!).and_call_original
filter.call_and_update_nodes
expect(filter.result[:reference_filter_nodes]).to eq(expected_nodes)
end
end
describe '.call' do
include_context 'new nodes'
let(:document) { Nokogiri::HTML.fragment('<a href="foo">foo</a>') }
let(:result) { { reference_filter_nodes: nodes } }
it 'updates all nodes', :aggregate_failures do
expect_next_instance_of(described_class) do |filter|
expect(filter).to receive(:call_and_update_nodes).and_call_original
expect(filter).to receive(:with_update_nodes).and_call_original
expect(filter).to receive(:call) { filter.instance_variable_set('@new_nodes', new_nodes) }
expect(filter).to receive(:update_nodes!).and_call_original
end
described_class.call(document, { project: project }, result)
expect(result[:reference_filter_nodes]).to eq(expected_nodes)
end
end
context 'abstract methods' do
let(:document) { Nokogiri::HTML.fragment('<a href="foo">foo</a>') }
let(:filter) { described_class.new(document, project: project) }
describe '#references_in' do
it 'raises NotImplementedError' do
expect { filter.references_in('foo', %r{(?<!\w)}) }.to raise_error(NotImplementedError)
end
end
describe '#object_link_filter' do
it 'raises NotImplementedError' do
expect { filter.send(:object_link_filter, 'foo', %r{(?<!\w)}) }.to raise_error(NotImplementedError)
end
end
end
end
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