Add complex Gemini format parse test

GeminiFormatTests/GeminiFormatTests.swift

@@ -10,9 +10,11 @@ import XCTest
 
 class GeminiFormatTests: XCTestCase {
     
-    func assertParseLines(text: String, lines expected: [Document.Line], message: String, file: StaticString = #filePath, line: UInt = #line) {
+    func assertParseLines(text: String, lines expected: [Document.Line], message: String = "", file: StaticString = #filePath, line: UInt = #line) {
         let doc = GeminiParser.parse(text: text, baseURL: URL(string: "gemini://example.com")!)
-        XCTAssertEqual(doc.lines, expected, message, file: file, line: line)
+        for (index, (actual, expected)) in zip(doc.lines, expected).enumerated() {
+            XCTAssertEqual(actual, expected, "\(message): index \(index)", file: file, line: line)
+        }
     }
 
     func testParsePlainLines() {
@@ -111,4 +113,98 @@ class GeminiFormatTests: XCTestCase {
         ], message: "don't parse special lines inside preformatted")
     }
     
+    func testComplexDocument() {
+        let text = """
+# Project Gemini
+
+## Overview
+
+Gemini is a new internet protocol which:
+
+* Is heavier than gopher
+* Is lighter than the web
+* Will not replace either
+* Strives for maximum power to weight ratio
+* Takes user privacy very seriously
+
+## Resources
+
+=> docs/    Gemini documentation
+=> software/    Gemini software
+=> servers/    Known Gemini servers
+=> https://lists.orbitalfox.eu/listinfo/gemini    Gemini mailing list
+=> gemini://gemini.conman.org/test/torture/    Gemini client torture test
+
+## Web proxies
+
+=> https://portal.mozz.us/?url=gemini%3A%2F%2Fgemini.circumlunar.space%2F&fmt=fixed    Gemini-to-web proxy service
+=> https://proxy.vulpes.one/gemini/gemini.circumlunar.space    Another Gemini-to-web proxy service
+
+## Search engines
+
+=> gemini://gus.guru/    Gemini Universal Search engine
+=> gemini://houston.coder.town    Houston search engine
+
+## Geminispace aggregators (experimental!)
+
+=> capcom/    CAPCOM
+=> gemini://rawtext.club:1965/~sloum/spacewalk.gmi    Spacewalk
+
+## Gemini mirrors of web resources
+
+=> gemini://gempaper.strangled.net/mirrorlist/    A list of mirrored services
+
+## Free Gemini hosting
+
+=> users/    Users with Gemini content on this server
+"""
+        
+        let expected: [Document.Line] = [
+            .heading("Project Gemini", level: .h1),
+            .text(""),
+            .heading("Overview", level: .h2),
+            .text(""),
+            .text("Gemini is a new internet protocol which:"),
+            .text(""),
+            .unorderedListItem("Is heavier than gopher"),
+            .unorderedListItem("Is lighter than the web"),
+            .unorderedListItem("Will not replace either"),
+            .unorderedListItem("Strives for maximum power to weight ratio"),
+            .unorderedListItem("Takes user privacy very seriously"),
+            .text(""),
+            .heading("Resources", level: .h2),
+            .text(""),
+            .link(URL(string: "gemini://example.com/docs/")!, text: "Gemini documentation"),
+            .link(URL(string: "gemini://example.com/software/")!, text: "Gemini software"),
+            .link(URL(string: "gemini://example.com/servers/")!, text: "Known Gemini servers"),
+            .link(URL(string: "https://lists.orbitalfox.eu/listinfo/gemini")!, text: "Gemini mailing list"),
+            .link(URL(string: "gemini://gemini.conman.org/test/torture/")!, text: "Gemini client torture test"),
+            .text(""),
+            .heading("Web proxies", level: .h2),
+            .text(""),
+            .link(URL(string: "https://portal.mozz.us/?url=gemini%3A%2F%2Fgemini.circumlunar.space%2F&fmt=fixed")!, text: "Gemini-to-web proxy service"),
+            .link(URL(string: "https://proxy.vulpes.one/gemini/gemini.circumlunar.space")!, text: "Another Gemini-to-web proxy service"),
+            .text(""),
+            .heading("Search engines", level: .h2),
+            .text(""),
+            .link(URL(string: "gemini://gus.guru/")!, text: "Gemini Universal Search engine"),
+            .link(URL(string: "gemini://houston.coder.town")!, text: "Houston search engine"),
+            .text(""),
+            .heading("Geminispace aggregators (experimental!)", level: .h2),
+            .text(""),
+            .link(URL(string: "gemini://example.com/capcom/")!, text: "CAPCOM"),
+            .link(URL(string: "gemini://rawtext.club:1965/~sloum/spacewalk.gmi")!, text: "Spacewalk"),
+            .text(""),
+            .heading("Gemini mirrors of web resources", level: .h2),
+            .text(""),
+            .link(URL(string: "gemini://gempaper.strangled.net/mirrorlist/")!, text: "A list of mirrored services"),
+            .text(""),
+            .heading("Free Gemini hosting", level: .h2),
+            .text(""),
+            .link(URL(string: "gemini://example.com/users/")!, text: "Users with Gemini content on this server")
+        ]
+        
+        assertParseLines(text: text, lines: expected)
+    }
+    
 }