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52e81582b4
Previously `HtmlToMarkdown` always converted HTML tables into Markdown tables. That lead to some badly formatted Markdown tables, e.g. when the table contained `rowspan` or `colspan`. This solves the issue by using very basic HTML tables in those cases.
707 lines
20 KiB
Ruby
707 lines
20 KiB
Ruby
# frozen_string_literal: true
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require "html_to_markdown"
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RSpec.describe HtmlToMarkdown do
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def html_to_markdown(html, opts = {})
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HtmlToMarkdown.new(html, opts).to_markdown
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end
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it "remove whitespaces" do
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html = <<-HTML
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<div dir="auto">Hello,
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<div dir="auto"><br></div>
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<div dir="auto"> This is the 1st paragraph. </div>
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<div dir="auto"><br></div>
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<div dir="auto">
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This is another paragraph
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</div>
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</div>
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HTML
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expect(html_to_markdown(html)).to eq(
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"Hello,\n\nThis is the 1st paragraph.\n\nThis is another paragraph",
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)
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html = <<~HTML
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<body text="#000000" bgcolor="#FFFFFF">
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<p>Let me see if it happens by answering your message through
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Thunderbird.</p>
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<p>Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1
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Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1
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Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1
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Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1
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Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1
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Long sentence 1
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</p>
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</body>
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HTML
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markdown = <<~MD
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Let me see if it happens by answering your message through Thunderbird.
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Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1 Long sentence 1
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MD
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expect(html_to_markdown(html)).to eq(markdown.strip)
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html = <<~HTML
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<p> This post
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has lots<br> of
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space
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</p>
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<pre> This space was left untouched !</pre>
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HTML
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markdown = <<~MD
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This post has lots
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of space
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```
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This space was left untouched !
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```
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MD
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expect(html_to_markdown(html)).to eq(markdown.strip)
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end
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it "removes tags that aren't allowed" do
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html = <<~HTML
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<custom>Text withing custom <span>tag</span></custom>
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<div>Text within allowed tag</div>
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HTML
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expect(html_to_markdown(html)).to eq("Text within allowed tag")
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end
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it "allows additional tags that can be consumed by subclasses" do
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class ExtendedHtmlToMarkdown < HtmlToMarkdown
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def to_markdown
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yield @doc
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super
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end
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end
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html = <<~HTML
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<custom-image image-id="42">Image text</custom-image>
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<div>Text within allowed tag</div>
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HTML
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md =
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ExtendedHtmlToMarkdown
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.new(html)
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.to_markdown { |doc| expect(doc.css("custom-image")).to be_empty }
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expect(md).to eq("Text within allowed tag")
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md =
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ExtendedHtmlToMarkdown
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.new(html, { additional_allowed_tags: ["custom-image"] })
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.to_markdown do |doc|
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doc.css("custom-image").each { |img| img.replace("Image #{img["image-id"]}") }
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end
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expect(md).to eq("Image 42\nText within allowed tag")
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end
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it "doesn't error on non-inline elements like (aside, section)" do
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html = <<~HTML
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<aside class="quote no-group">
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<blockquote>
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<p>Hello,<br>is it me you're looking for?</p>
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</blockquote>
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<br>
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</aside>
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HTML
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markdown = <<~MD
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> Hello,
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> is it me you're looking for?
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MD
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expect(html_to_markdown(html)).to eq(markdown.strip)
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end
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it "skips hidden tags" do
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expect(html_to_markdown("<p>Hello <span hidden>cruel </span>World!</p>")).to eq("Hello World!")
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end
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it "converts <strong>" do
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expect(html_to_markdown("<strong>Strong</strong>")).to eq("**Strong**")
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expect(html_to_markdown("<strong>Str*ng</strong>")).to eq("__Str*ng__")
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end
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it "converts <b>" do
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expect(html_to_markdown("<b>Bold</b>")).to eq("**Bold**")
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expect(html_to_markdown("<b>B*ld</b>")).to eq("__B*ld__")
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html = <<~HTML
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Before
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<p><b>Bold
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<br>
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<br>
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</b>
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</p>
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After
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HTML
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expect(html_to_markdown(html)).to eq("Before\n\n**Bold**\n\nAfter")
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end
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it "converts <em>" do
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expect(html_to_markdown("<em>Emphasis</em>")).to eq("*Emphasis*")
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expect(html_to_markdown("<em>Emph*sis</em>")).to eq("_Emph*sis_")
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end
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it "converts <i>" do
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expect(html_to_markdown("<i>Italic</i>")).to eq("*Italic*")
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expect(html_to_markdown("<i>It*lic</i>")).to eq("_It*lic_")
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end
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it "converts <a>" do
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expect(html_to_markdown(%Q{<a href="https://www.discourse.org">Discourse</a>})).to eq(
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"[Discourse](https://www.discourse.org)",
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)
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end
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it "supports SiteSetting.allowed_href_schemes" do
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SiteSetting.allowed_href_schemes = "tel|steam"
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expect(html_to_markdown(%Q{<a href="steam://store/48000">LIMBO</a>})).to eq(
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"[LIMBO](steam://store/48000)",
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)
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end
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it "removes empty & invalid <a>" do
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expect(html_to_markdown("<a>Discourse</a>")).to eq("Discourse")
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expect(html_to_markdown(%Q{<a href="">Discourse</a>})).to eq("Discourse")
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expect(html_to_markdown(%Q{<a href="foo.bar">Discourse</a>})).to eq("Discourse")
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end
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HTML_WITH_IMG ||= %Q{<img src="https://www.discourse.org/logo.svg" alt="Discourse Logo">}
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HTML_WITH_CID_IMG ||= %Q{<img src="cid:ii_1525434659ddb4cb" title="Discourse Logo">}
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it "converts <img>" do
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expect(html_to_markdown(HTML_WITH_IMG)).to eq(
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"",
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)
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end
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it "keeps <img> with 'keep_img_tags'" do
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expect(html_to_markdown(HTML_WITH_IMG, keep_img_tags: true)).to eq(HTML_WITH_IMG)
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end
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it "removes newlines from img alt text" do
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html_with_alt_newlines =
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%Q{<img src="https://www.discourse.org/logo.svg" alt="Discourse\n\nLogo">}
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expect(html_to_markdown(html_with_alt_newlines)).to eq(
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"",
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)
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end
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it "removes empty & invalid <img>" do
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expect(html_to_markdown("<img>")).to eq("")
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expect(html_to_markdown(%Q{<img src="">})).to eq("")
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expect(html_to_markdown(%Q{<img src="foo.bar">})).to eq("")
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end
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it "keeps <img> with src='cid:' with 'keep_cid_imgs'" do
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expect(html_to_markdown(HTML_WITH_CID_IMG, keep_cid_imgs: true)).to eq(HTML_WITH_CID_IMG)
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end
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it "removes newlines from img alt text with cid images" do
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html_with_cid_alt_newlines = %Q{<img src="cid:ii_1525434659ddb4cb" title="Discourse\n\nLogo">}
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expect(html_to_markdown(html_with_cid_alt_newlines, keep_cid_imgs: true)).to eq(
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%Q{<img src="cid:ii_1525434659ddb4cb" title="Discourse Logo">},
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)
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end
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it "skips hidden <img>" do
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expect(html_to_markdown(%Q{<img src="https://www.discourse.org/logo.svg" width=0>})).to eq("")
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expect(html_to_markdown(%Q{<img src="https://www.discourse.org/logo.svg" height="0">})).to eq(
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"",
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)
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end
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it "supports width/height on <img>" do
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expect(html_to_markdown(%Q{<img src="https://www.discourse.org/logo.svg" height=100>})).to eq(
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"",
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)
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expect(html_to_markdown(%Q{<img src="https://www.discourse.org/logo.svg" width=200>})).to eq(
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"",
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)
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expect(
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html_to_markdown(%Q{<img src="https://www.discourse.org/logo.svg" height=100 width=200>}),
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).to eq("")
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end
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(1..6).each do |n|
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it "converts <h#{n}>" do
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expect(html_to_markdown("<h#{n}>Header #{n}</h#{n}>")).to eq("#" * n + " Header #{n}")
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end
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end
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it "converts <br>" do
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expect(html_to_markdown("Before<br>Inside<br>After")).to eq("Before\nInside\nAfter")
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end
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it "skips <br> inside <p> if next character is \n" do
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expect(html_to_markdown("<p>Before<br>\nInside<br>After</p>")).to eq("Before\nInside\nAfter")
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end
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it "converts <hr>" do
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expect(html_to_markdown("Before<hr>Inside<hr>After")).to eq(
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"Before\n\n---\n\nInside\n\n---\n\nAfter",
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)
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end
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it "converts <tt>" do
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expect(html_to_markdown("<tt>Teletype</tt>")).to eq("`Teletype`")
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end
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it "converts <code>" do
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expect(html_to_markdown("<code>Code</code>")).to eq("`Code`")
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end
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it "supports <ins>" do
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expect(html_to_markdown("This is an <ins>insertion</ins>")).to eq(
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"This is an <ins>insertion</ins>",
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)
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end
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it "supports <del>" do
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expect(html_to_markdown("This is a <del>deletion</del>")).to eq("This is a <del>deletion</del>")
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end
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it "supports <sub>" do
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expect(html_to_markdown("H<sub>2</sub>O")).to eq("H<sub>2</sub>O")
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end
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it "supports <mark>" do
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expect(html_to_markdown("<mark>This is highlighted!</mark>")).to eq(
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"<mark>This is highlighted!</mark>",
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)
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end
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it "supports <sup>" do
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expect(html_to_markdown("<sup>Super Script!</sup>")).to eq("<sup>Super Script!</sup>")
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end
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it "supports <small>" do
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expect(html_to_markdown("<small>Small</small>")).to eq("<small>Small</small>")
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end
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it "supports <kbd>" do
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expect(html_to_markdown("<kbd>CTRL</kbd>+<kbd>C</kbd>")).to eq("<kbd>CTRL</kbd>+<kbd>C</kbd>")
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end
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it "supports <abbr>" do
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expect(
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html_to_markdown(%Q{<abbr title="Civilized Discourse Construction Kit, Inc.">CDCK</abbr>}),
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).to eq(%Q{<abbr title="Civilized Discourse Construction Kit, Inc.">CDCK</abbr>})
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end
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it "supports <s>" do
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expect(html_to_markdown("<s>Strike Through</s>")).to eq("~~Strike Through~~")
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end
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it "supports <strike>" do
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expect(html_to_markdown("<strike>Strike Through</strike>")).to eq("~~Strike Through~~")
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end
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it "supports <blockquote>" do
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expect(html_to_markdown("<blockquote>Quote</blockquote>")).to eq("> Quote")
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end
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it "supports <ul>" do
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expect(html_to_markdown("<ul><li>🍏</li><li>🍐</li><li>🍌</li></ul>")).to eq("- 🍏\n- 🍐\n- 🍌")
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expect(html_to_markdown("<ul>\n<li>🍏</li>\n<li>🍐</li>\n<li>🍌</li>\n</ul>")).to eq(
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"- 🍏\n- 🍐\n- 🍌",
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)
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end
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it "supports <ol>" do
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expect(html_to_markdown("<ol><li>🍆</li><li>🍅</li><li>🍄</li></ol>")).to eq("1. 🍆\n1. 🍅\n1. 🍄")
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end
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it "supports <p> inside <li>" do
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expect(html_to_markdown("<ul><li><p>🍏</p></li><li><p>🍐</p></li><li><p>🍌</p></li></ul>")).to eq(
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"- 🍏\n\n- 🍐\n\n- 🍌",
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)
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end
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it "supports <ul> inside <ul>" do
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expect(html_to_markdown(<<-HTML)).to eq(
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<ul>
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<li>Fruits
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<ul>
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<li>🍏</li>
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<li>🍐</li>
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<li>🍌</li>
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</ul>
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</li>
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<li>Vegetables
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<ul>
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<li>🍆</li>
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<li>🍅</li>
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<li>🍄</li>
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</ul>
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</li>
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</ul>
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HTML
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"- Fruits\n - 🍏\n - 🍐\n - 🍌\n- Vegetables\n - 🍆\n - 🍅\n - 🍄",
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)
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end
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it "supports bare <li>" do
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expect(html_to_markdown("<li>I'm alone</li>")).to eq("- I'm alone")
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end
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it "supports <pre>" do
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expect(html_to_markdown("<pre>var foo = 'bar';</pre>")).to eq("```\nvar foo = 'bar';\n```")
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expect(html_to_markdown("<pre><code>var foo = 'bar';</code></pre>")).to eq(
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"```\nvar foo = 'bar';\n```",
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)
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expect(
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html_to_markdown(%Q{<pre><code class="lang-javascript">var foo = 'bar';</code></pre>}),
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).to eq("```javascript\nvar foo = 'bar';\n```")
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expect(
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html_to_markdown(
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"<pre> function f() {\n console.log('Hello world!');\n }</pre>",
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),
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).to eq("```\n function f() {\n console.log('Hello world!');\n }\n```")
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end
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it "supports <pre> inside <blockquote>" do
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expect(
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html_to_markdown("<blockquote><pre><code>var foo = 'bar';</code></pre></blockquote>"),
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).to eq("> ```\n> var foo = 'bar';\n> ```")
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end
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it "works" do
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expect(
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html_to_markdown(
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"<ul><li><p>A list item with a blockquote:</p><blockquote><p>This is a <strong>blockquote</strong><br>inside a list item.</p></blockquote></li></ul>",
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),
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).to eq(
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"- A list item with a blockquote:\n\n > This is a **blockquote**\n > inside a list item.",
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)
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end
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it "supports html document" do
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expect(html_to_markdown("<html><body>Hello<div>World</div></body></html>")).to eq(
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"Hello\nWorld",
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)
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end
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it "handles <p>" do
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expect(html_to_markdown("<p>1st paragraph</p><p>2nd paragraph</p>")).to eq(
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"1st paragraph\n\n2nd paragraph",
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)
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expect(
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html_to_markdown(
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"<body><p>1st paragraph</p>\n <p> 2nd paragraph\n 2nd paragraph</p>\n<p>3rd paragraph</p></body>",
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),
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).to eq("1st paragraph\n\n2nd paragraph 2nd paragraph\n\n3rd paragraph")
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end
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it "handles <div>" do
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expect(html_to_markdown("<div>1st div</div><div>2nd div</div>")).to eq("1st div\n2nd div")
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end
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it "swallows <span>" do
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expect(html_to_markdown("<span>Span</span>")).to eq("Span")
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end
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it "swallows <u>" do
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expect(html_to_markdown("<u>Underline</u>")).to eq("Underline")
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end
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it "removes <script>" do
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expect(html_to_markdown("<script>var foo = 'bar'</script>")).to eq("")
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end
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it "removes <style>" do
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expect(html_to_markdown("<style>* { margin: 0 }</style>")).to eq("")
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end
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it "handles <p> and <div> within <span>" do
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html = "<div>1st paragraph<span><div>2nd paragraph</div><p>3rd paragraph</p></span></div>"
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expect(html_to_markdown(html)).to eq("1st paragraph\n2nd paragraph\n\n3rd paragraph")
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end
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it "handles <p> and <div> within <font>" do
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html =
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"<font>1st paragraph<br><span>2nd paragraph</span><div>3rd paragraph</div><p>4th paragraph</p></font>"
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expect(html_to_markdown(html)).to eq(
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"1st paragraph\n2nd paragraph\n3rd paragraph\n\n4th paragraph",
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)
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end
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context "with an oddly placed <br>" do
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it "handles <strong>" do
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expect(html_to_markdown("Hello <strong><br>Bold</strong> World")).to eq(
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"Hello\n**Bold** World",
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)
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expect(html_to_markdown("Hello <strong>Bold<br></strong> World")).to eq(
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"Hello **Bold**\nWorld",
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)
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expect(html_to_markdown("Hello <strong>Bold<br>text</strong> World")).to eq(
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"Hello **Bold**\n**text** World",
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)
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end
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it "handles <em>" do
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expect(html_to_markdown("Hello <em><br>Italic</em> World")).to eq("Hello\n*Italic* World")
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expect(html_to_markdown("Hello <em>Italic<br></em> World")).to eq("Hello *Italic*\nWorld")
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expect(html_to_markdown("Hello <em>Italic<br>text</em> World")).to eq(
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"Hello *Italic*\n*text* World",
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)
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end
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it "works" do
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expect(html_to_markdown("<div>A <b> B <i> C <br> D </i> E <br> F </b> G</div>")).to eq(
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"A __B *C*__\n__*D* E__\n**F** G",
|
|
)
|
|
end
|
|
end
|
|
|
|
context "with an empty tag" do
|
|
it "handles <strong>" do
|
|
expect(html_to_markdown("<strong></strong>")).to eq("")
|
|
expect(html_to_markdown("<strong> </strong>")).to eq("")
|
|
expect(html_to_markdown("Some<strong> </strong>text")).to eq("Some text")
|
|
expect(html_to_markdown("Some<strong> </strong>text")).to eq("Some text")
|
|
end
|
|
|
|
it "handles <em>" do
|
|
expect(html_to_markdown("<em></em>")).to eq("")
|
|
expect(html_to_markdown("<em> </em>")).to eq("")
|
|
expect(html_to_markdown("Some<em> </em>text")).to eq("Some text")
|
|
expect(html_to_markdown("Some<em> </em>text")).to eq("Some text")
|
|
end
|
|
end
|
|
|
|
context "with spaces around text" do
|
|
it "handles <strong>" do
|
|
expect(html_to_markdown("<strong> Bold</strong>")).to eq("**Bold**")
|
|
expect(html_to_markdown("<strong> Bold</strong>")).to eq("**Bold**")
|
|
expect(html_to_markdown("<strong>Bold </strong>")).to eq("**Bold**")
|
|
expect(html_to_markdown("<strong>Bold </strong>")).to eq("**Bold**")
|
|
expect(html_to_markdown("Some<strong> bold</strong> text")).to eq("Some **bold** text")
|
|
expect(html_to_markdown("Some<strong> bold</strong> text")).to eq("Some **bold** text")
|
|
expect(html_to_markdown("Some <strong>bold </strong>text")).to eq("Some **bold** text")
|
|
expect(html_to_markdown("Some <strong>bold </strong>text")).to eq("Some **bold** text")
|
|
end
|
|
|
|
it "handles <em>" do
|
|
expect(html_to_markdown("<em> Italic</em>")).to eq("*Italic*")
|
|
expect(html_to_markdown("<em> Italic</em>")).to eq("*Italic*")
|
|
expect(html_to_markdown("<em>Italic </em>")).to eq("*Italic*")
|
|
expect(html_to_markdown("<em>Italic </em>")).to eq("*Italic*")
|
|
expect(html_to_markdown("Some<em> italic</em> text")).to eq("Some *italic* text")
|
|
expect(html_to_markdown("Some<em> italic</em> text")).to eq("Some *italic* text")
|
|
expect(html_to_markdown("Some <em>italic </em>text")).to eq("Some *italic* text")
|
|
expect(html_to_markdown("Some <em>italic </em>text")).to eq("Some *italic* text")
|
|
end
|
|
end
|
|
|
|
it "supports <table>" do
|
|
html = <<~HTML
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>This</th>
|
|
<th>is</th>
|
|
<th>the</th>
|
|
<th><i>headers</i></th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>I am</td>
|
|
<td>the</td>
|
|
<td><b>first</b></td>
|
|
<td>row</td>
|
|
</tr>
|
|
<tr>
|
|
<td>And this</td>
|
|
<td>is the</td>
|
|
<td>2<sup>nd</sup></td>
|
|
<td>line</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
HTML
|
|
|
|
markdown = <<~MD
|
|
| This | is | the | *headers* |
|
|
| - | - | - | - |
|
|
| I am | the | **first** | row |
|
|
| And this | is the | 2<sup>nd</sup> | line |
|
|
MD
|
|
|
|
expect(html_to_markdown(html)).to eq(markdown.strip)
|
|
|
|
expect(html_to_markdown("<table><tr><td>Hello</td><td>World</td></tr></table>")).to eq(
|
|
"| Hello | World |\n| - | - |",
|
|
)
|
|
end
|
|
|
|
it "keeps HTML for badly formatted <table>" do
|
|
html = <<~HTML
|
|
<table>
|
|
<tr>
|
|
<th>1</th>
|
|
<th>2</th>
|
|
<th>3</th>
|
|
<th>4</th>
|
|
</tr>
|
|
<tr>
|
|
<td><One></td>
|
|
<td><strong>Two</strong></td>
|
|
<td>Three<script>alert("foo")</script></td>
|
|
</tr>
|
|
</table>
|
|
HTML
|
|
|
|
markdown = <<~MD
|
|
<table>
|
|
<tr>
|
|
<th>
|
|
|
|
1
|
|
|
|
</th>
|
|
<th>
|
|
|
|
2
|
|
|
|
</th>
|
|
<th>
|
|
|
|
3
|
|
|
|
</th>
|
|
<th>
|
|
|
|
4
|
|
|
|
</th>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
|
|
<One>
|
|
|
|
</td>
|
|
<td>
|
|
|
|
**Two**
|
|
|
|
</td>
|
|
<td>
|
|
|
|
Three
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
MD
|
|
|
|
expect(html_to_markdown(html)).to eq(markdown.strip)
|
|
end
|
|
|
|
it "keeps HTML for <table> with colspan" do
|
|
html = <<~HTML
|
|
<table>
|
|
<tr>
|
|
<th>1</th>
|
|
<th>2</th>
|
|
</tr>
|
|
<tr>
|
|
<td colspan="2">One / Two</td>
|
|
</tr>
|
|
</table>
|
|
HTML
|
|
|
|
markdown = <<~MD
|
|
<table>
|
|
<tr>
|
|
<th>
|
|
|
|
1
|
|
|
|
</th>
|
|
<th>
|
|
|
|
2
|
|
|
|
</th>
|
|
</tr>
|
|
<tr>
|
|
<td colspan="2">
|
|
|
|
One / Two
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
MD
|
|
|
|
expect(html_to_markdown(html)).to eq(markdown.strip)
|
|
end
|
|
|
|
it "keeps HTML for <table> with rowspan" do
|
|
html = <<~HTML
|
|
<table>
|
|
<tr>
|
|
<th>1</th>
|
|
<th>2</th>
|
|
</tr>
|
|
<tr>
|
|
<td>A</td>
|
|
<td rowspan="2">B</td>
|
|
</tr>
|
|
<tr>
|
|
<td>C</td>
|
|
</tr>
|
|
</table>
|
|
HTML
|
|
|
|
markdown = <<~MD
|
|
<table>
|
|
<tr>
|
|
<th>
|
|
|
|
1
|
|
|
|
</th>
|
|
<th>
|
|
|
|
2
|
|
|
|
</th>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
|
|
A
|
|
|
|
</td>
|
|
<td rowspan="2">
|
|
|
|
B
|
|
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
|
|
C
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
MD
|
|
|
|
expect(html_to_markdown(html)).to eq(markdown.strip)
|
|
end
|
|
end
|