138 lines
4.2 KiB
Ruby
138 lines
4.2 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Banzai::Filter::MathFilter do
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include FilterSpecHelper
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it 'leaves regular inline code unchanged' do
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input = "<code>2+2</code>"
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doc = filter(input)
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expect(doc.to_s).to eq input
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end
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it 'removes surrounding dollar signs and adds class code, math and js-render-math' do
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doc = filter("$<code>2+2</code>$")
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expect(doc.to_s).to eq '<code class="code math js-render-math" data-math-style="inline">2+2</code>'
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end
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it 'only removes surrounding dollar signs' do
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doc = filter("test $<code>2+2</code>$ test")
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before = doc.xpath('descendant-or-self::text()[1]').first
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after = doc.xpath('descendant-or-self::text()[3]').first
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expect(before.to_s).to eq 'test '
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expect(after.to_s).to eq ' test'
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end
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it 'only removes surrounding single dollar sign' do
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doc = filter("test $$<code>2+2</code>$$ test")
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before = doc.xpath('descendant-or-self::text()[1]').first
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after = doc.xpath('descendant-or-self::text()[3]').first
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expect(before.to_s).to eq 'test $'
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expect(after.to_s).to eq '$ test'
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end
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it 'adds data-math-style inline attribute to inline math' do
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doc = filter('$<code>2+2</code>$')
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code = doc.xpath('descendant-or-self::code').first
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expect(code['data-math-style']).to eq 'inline'
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end
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it 'adds class code and math to inline math' do
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doc = filter('$<code>2+2</code>$')
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code = doc.xpath('descendant-or-self::code').first
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expect(code[:class]).to include("code")
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expect(code[:class]).to include("math")
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end
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it 'adds js-render-math class to inline math' do
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doc = filter('$<code>2+2</code>$')
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code = doc.xpath('descendant-or-self::code').first
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expect(code[:class]).to include("js-render-math")
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end
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# Cases with faulty syntax. Should be a no-op
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it 'ignores cases with missing dolar sign at the end' do
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input = "test $<code>2+2</code> test"
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doc = filter(input)
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expect(doc.to_s).to eq input
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end
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it 'ignores cases with missing dolar sign at the beginning' do
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input = "test <code>2+2</code>$ test"
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doc = filter(input)
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expect(doc.to_s).to eq input
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end
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it 'ignores dollar signs if it is not adjacent' do
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input = '<p>We check strictly $<code>2+2</code> and <code>2+2</code>$ </p>'
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doc = filter(input)
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expect(doc.to_s).to eq input
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end
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it 'ignores dollar signs if they are inside another element' do
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input = '<p>We check strictly <em>$</em><code>2+2</code><em>$</em></p>'
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doc = filter(input)
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expect(doc.to_s).to eq input
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end
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# Display math
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it 'adds data-math-style display attribute to display math' do
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doc = filter('<pre class="code highlight js-syntax-highlight language-math" v-pre="true"><code>2+2</code></pre>')
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pre = doc.xpath('descendant-or-self::pre').first
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expect(pre['data-math-style']).to eq 'display'
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end
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it 'adds js-render-math class to display math' do
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doc = filter('<pre class="code highlight js-syntax-highlight language-math" v-pre="true"><code>2+2</code></pre>')
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pre = doc.xpath('descendant-or-self::pre').first
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expect(pre[:class]).to include("js-render-math")
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end
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it 'ignores code blocks that are not math' do
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input = '<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true"><code>2+2</code></pre>'
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doc = filter(input)
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expect(doc.to_s).to eq input
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end
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it 'requires the pre to contain both code and math' do
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input = '<pre class="highlight js-syntax-highlight language-plaintext language-math" v-pre="true"><code>2+2</code></pre>'
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doc = filter(input)
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expect(doc.to_s).to eq input
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end
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it 'dollar signs around to display math' do
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doc = filter('$<pre class="code highlight js-syntax-highlight language-math" v-pre="true"><code>2+2</code></pre>$')
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before = doc.xpath('descendant-or-self::text()[1]').first
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after = doc.xpath('descendant-or-self::text()[3]').first
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expect(before.to_s).to eq '$'
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expect(after.to_s).to eq '$'
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end
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it 'limits how many elements can be marked as math' do
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stub_const('Banzai::Filter::MathFilter::RENDER_NODES_LIMIT', 2)
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doc = filter('$<code>2+2</code>$ + $<code>3+3</code>$ + $<code>4+4</code>$')
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expect(doc.search('.js-render-math').count).to eq(2)
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end
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end
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