# frozen_string_literal: true require "plain_text_to_markdown" RSpec.describe PlainTextToMarkdown do def to_markdown(text, opts = {}) PlainTextToMarkdown.new(text, opts).to_markdown end let(:nbsp) { " " } describe "quotes" do it "uses the correct quote level" do expect(to_markdown("> foo")).to eq("> foo") expect(to_markdown(">>> foo")).to eq(">>> foo") expect(to_markdown(">>>>>>> foo")).to eq(">>>>>>> foo") end it "ignores the first whitespace after the quote identifier" do expect(to_markdown(">foo")).to eq("> foo") expect(to_markdown("> foo")).to eq("> foo") expect(to_markdown(">\tfoo")).to eq("> foo") expect(to_markdown("> foo")).to eq("> foo") expect(to_markdown(">\t foo")).to eq("> foo") end it "adds a blank line after a quote if it is followed by text" do expect(to_markdown("> foo\nbar")).to eq("> foo\n\nbar") expect(to_markdown(">> foo\nbar")).to eq(">> foo\n\nbar") end it "ignores multiple consecutive blank lines" do expect(to_markdown("> foo\n\nbar")).to eq("> foo\n\nbar") expect(to_markdown("> foo\n\n\nbar")).to eq("> foo\n\nbar") expect(to_markdown("> foo\n> \n>\n>\n> bar")).to eq("> foo\n>\n> bar") end it "adds an additional line with quote identifier if the quote level is decreasing" do expect(to_markdown(">> foo\n>bar")).to eq(">> foo\n>\n> bar") expect(to_markdown(">>>> foo\n>bar")).to eq(">>>> foo\n>\n> bar") expect(to_markdown(">> foo\nno quote\n>bar")).to eq(">> foo\n\nno quote\n> bar") end it "does not add an additional line with quote identifier if the quote level is decreasing and text is blank" do expect(to_markdown(">>> foo\n>>\n>> bar")).to eq(">>> foo\n>>\n>> bar") end end describe "special characters" do it "escapes special Markdown characters" do expect(to_markdown('\ backslash')).to eq('\\\\ backslash') expect(to_markdown("` backtick")).to eq('\` backtick') expect(to_markdown("* asterisk")).to eq('\* asterisk') expect(to_markdown("_ underscore")).to eq('\_ underscore') expect(to_markdown("{} curly braces")).to eq('\{\} curly braces') expect(to_markdown("[] square brackets")).to eq('\[\] square brackets') expect(to_markdown("() parentheses")).to eq('\(\) parentheses') expect(to_markdown("# hash mark")).to eq('\# hash mark') expect(to_markdown("+ plus sign")).to eq('\+ plus sign') expect(to_markdown("- minus sign")).to eq('\- minus sign') expect(to_markdown(". dot")).to eq('\. dot') expect(to_markdown("! exclamation mark")).to eq('\! exclamation mark') expect(to_markdown("~ tilde")).to eq('\~ tilde') end it "escapes special HTML characters" do expect(to_markdown("' single quote")).to eq("' single quote") expect(to_markdown("\" double quote")).to eq("" double quote") expect(to_markdown("& ampersand")).to eq("& ampersand") expect(to_markdown("<> less-than and greater-than sign")).to eq( "<> less\\-than and greater\\-than sign", ) end it "escapes special characters but ignores links" do expect( to_markdown( "*some text* https://www.example.com/foo.html?a=1&b=0 & <https://www.example.com/bar.html?a=1&b=0> *more text*", ), ).to eq( "\\*some text\\* https://www.example.com/foo.html?a=1&b=0 & <https://www.example.com/bar.html?a=1&b=0> \\*more text\\*", ) end end describe "indentation" do it "does not replace one leading whitespace" do expect(to_markdown(" foo")).to eq(" foo") end it "replaces leading whitespaces with non-breaking spaces" do expect(to_markdown(" foo")).to eq("#{nbsp}#{nbsp}foo") expect(to_markdown(" foo")).to eq("#{nbsp}#{nbsp}#{nbsp}#{nbsp}foo") end it "replaces each leading tabs with two non-breaking spaces" do expect(to_markdown("\tfoo")).to eq("#{nbsp}#{nbsp}foo") expect(to_markdown(" \tfoo")).to eq("#{nbsp}#{nbsp}#{nbsp}foo") expect(to_markdown("\t foo")).to eq("#{nbsp}#{nbsp}#{nbsp}foo") expect(to_markdown(" \t foo")).to eq("#{nbsp}#{nbsp}#{nbsp}#{nbsp}foo") expect(to_markdown("\t\tfoo")).to eq("#{nbsp}#{nbsp}#{nbsp}#{nbsp}foo") end it "correctly replaces leading whitespaces within quotes" do expect(to_markdown("> foo")).to eq("> foo") expect(to_markdown("> foo")).to eq("> #{nbsp}#{nbsp}foo") end it "does not replace whitespaces within text" do expect(to_markdown("foo bar")).to eq("foo bar") expect(to_markdown("foo\t\tbar")).to eq("foo\t\tbar") end end describe "format=flowed" do it "concats lines ending with a space" do text = "Lorem ipsum dolor sit amet, consectetur \nadipiscing elit. Quasi vero, inquit, \nperpetua oratio rhetorum solum, non \netiam philosophorum sit." markdown = "Lorem ipsum dolor sit amet, consectetur adipiscing elit\\. Quasi vero, inquit, perpetua oratio rhetorum solum, non etiam philosophorum sit\\." expect(to_markdown(text, format_flowed: true)).to eq(markdown) end it "does not concat lines when there is an empty line between" do text = "Lorem ipsum dolor sit amet, consectetur \nadipiscing elit. \n\nQuasi vero, inquit, \nperpetua oratio rhetorum solum, non \netiam philosophorum sit." markdown = "Lorem ipsum dolor sit amet, consectetur adipiscing elit\\. \n\nQuasi vero, inquit, perpetua oratio rhetorum solum, non etiam philosophorum sit\\." expect(to_markdown(text, format_flowed: true)).to eq(markdown) end it "concats quoted lines ending with a space" do text = "> Lorem ipsum dolor sit amet, consectetur \n> adipiscing elit. Quasi vero, inquit, \n> perpetua oratio rhetorum solum, non \n> etiam philosophorum sit." markdown = "> Lorem ipsum dolor sit amet, consectetur adipiscing elit\\. Quasi vero, inquit, perpetua oratio rhetorum solum, non etiam philosophorum sit\\." expect(to_markdown(text, format_flowed: true)).to eq(markdown) end it "does not concat quoted lines ending with a space when the quote level differs" do text = "> Lorem ipsum dolor sit amet, consectetur \n> adipiscing elit. \n>> Quasi vero, inquit, \n>> perpetua oratio rhetorum solum, non \n> etiam philosophorum sit." markdown = "> Lorem ipsum dolor sit amet, consectetur adipiscing elit\\. \n>> Quasi vero, inquit, perpetua oratio rhetorum solum, non \n>\n> etiam philosophorum sit\\." expect(to_markdown(text, format_flowed: true)).to eq(markdown) end it "does not recognize a signature separator as start of flowed text" do text = "-- \nsignature line 1\nsignature line 2" markdown = "\\-\\- \nsignature line 1\nsignature line 2" expect(to_markdown(text, format_flowed: true)).to eq(markdown) end it "does not concat lines when there is a signature separator" do text = "Lorem ipsum \ndolor sit amet \n-- \nsignature line 1\nsignature line 2" markdown = "Lorem ipsum dolor sit amet \n\\-\\- \nsignature line 1\nsignature line 2" expect(to_markdown(text, format_flowed: true)).to eq(markdown) end it "removes the trailing space if DelSp is set to 'yes'" do text = "Lorem ipsum dolor sit amet, consectetur \nadipiscing elit. \nQuasi vero, inquit" markdown = "Lorem ipsum dolor sit amet, consecteturadipiscing elit\\.Quasi vero, inquit" expect(to_markdown(text, format_flowed: true, delete_flowed_space: true)).to eq(markdown) end end describe "links" do it "removes duplicate links" do expect( to_markdown( "foo https://www.example.com/foo.html?a=1 <https://www.example.com/foo.html?a=1> bar", ), ).to eq("foo https://www.example.com/foo.html?a=1 bar") expect( to_markdown("foo https://www.example.com/foo.html <https://www.example.com/foo.html> bar"), ).to eq("foo https://www.example.com/foo.html bar") expect( to_markdown("foo https://www.example.com/foo.html (https://www.example.com/foo.html) bar"), ).to eq("foo https://www.example.com/foo.html bar") expect( to_markdown("foo https://www.example.com/foo.html https://www.example.com/foo.html bar"), ).to eq("foo https://www.example.com/foo.html bar") end it "does not removes duplicate links when there is text between the links" do expect( to_markdown( "foo https://www.example.com/foo.html bar https://www.example.com/foo.html baz", ), ).to eq("foo https://www.example.com/foo.html bar https://www.example.com/foo.html baz") end it "does not explode with weird links" do expect { Timeout.timeout(0.25) { to_markdown("https://www.discourse.org/?boom=#{"." * 20}") } }.not_to raise_error end end describe "code" do it "detects matching Markdown code block within backticks" do expect(to_markdown("foo\n```\n<this is code>\n```")).to eq("foo\n```\n<this is code>\n```") end it "does not detect Markdown code block when backticks are not on new line" do expect(to_markdown("foo\n```\n<this is code> ```")).to eq( "foo\n\\`\\`\\`\n<this is code> \\`\\`\\`", ) end it "does not detect Markdown code block when backticks are indented by more than 3 whitespaces" do expect(to_markdown("foo\n ```\n<this is code>\n ```")).to include("<this is code>") expect(to_markdown("foo\n ```\n<this is code>\n ```")).to include("<this is code>") expect(to_markdown("foo\n ```\n<this is code>\n```")).to include("<this is code>") expect(to_markdown("foo\n```\n<this is code>\n ```")).to include("<this is code>") expect(to_markdown("foo\n ```\n<this is code>\n```")).to include("<this is code>") expect(to_markdown("foo\n```\n<this is code>\n ```")).to include( "<this is code>", ) end end end