Sapling/Tests/SaplingEditorTests/EditorMarkdownRenderingSampleTests.swift

import XCTest
@testable import SaplingEditor

final class EditorMarkdownRenderingSampleTests: XCTestCase {
    func testMilestoneThreeSamplesExerciseMarkdownRenderingFeatures() throws {
        let sampleNames = [
            "markdown-technical-documentation.md",
            "markdown-meeting-notes.md",
            "markdown-research-notes.md",
            "markdown-project-plan.md",
            "markdown-long-form-writing.md"
        ]
        let samplesDirectory = URL(fileURLWithPath: FileManager.default.currentDirectoryPath)
            .appendingPathComponent("Docs/EditorPrototypes", isDirectory: true)
        let renderer = HybridMarkdownLineRenderer()
        var counts = FeatureCounts()

        for sampleName in sampleNames {
            let source = try String(contentsOf: samplesDirectory.appendingPathComponent(sampleName), encoding: .utf8)
            let lines = EditorActiveLineTracker.lines(from: source, activeLineIndex: 0)
            let plans = renderer.renderPlans(for: lines)

            XCTAssertGreaterThan(lines.count, 10, "\(sampleName) should represent a realistic document shape.")
            counts.collect(plans)
        }

        XCTAssertGreaterThan(counts.headings, 0)
        XCTAssertGreaterThan(counts.blockquotes, 0)
        XCTAssertGreaterThan(counts.horizontalRules, 0)
        XCTAssertGreaterThan(counts.unorderedLists, 0)
        XCTAssertGreaterThan(counts.orderedLists, 0)
        XCTAssertGreaterThan(counts.taskLists, 0)
        XCTAssertGreaterThan(counts.codeFences, 0)
        XCTAssertGreaterThan(counts.codeContentLines, 0)
        XCTAssertGreaterThan(counts.tableRows, 0)
        XCTAssertGreaterThan(counts.boldSpans, 0)
        XCTAssertGreaterThan(counts.italicSpans, 0)
        XCTAssertGreaterThan(counts.inlineCodeSpans, 0)
        XCTAssertGreaterThan(counts.markdownLinks, 0)
        XCTAssertGreaterThan(counts.automaticLinks, 0)
    }
}

private struct FeatureCounts {
    var headings = 0
    var blockquotes = 0
    var horizontalRules = 0
    var unorderedLists = 0
    var orderedLists = 0
    var taskLists = 0
    var codeFences = 0
    var codeContentLines = 0
    var tableRows = 0
    var boldSpans = 0
    var italicSpans = 0
    var inlineCodeSpans = 0
    var markdownLinks = 0
    var automaticLinks = 0

    mutating func collect(_ plans: [HybridMarkdownLineRenderPlan]) {
        for plan in plans {
            switch plan.kind {
            case .heading:
                headings += 1
            case .blockquote:
                blockquotes += 1
            case .horizontalRule:
                horizontalRules += 1
            case .unorderedList:
                unorderedLists += 1
            case .orderedList:
                orderedLists += 1
            case .taskList:
                taskLists += 1
            case .fencedCodeFence:
                codeFences += 1
            case .codeBlockContent:
                codeContentLines += 1
            case .tableRow:
                tableRows += 1
            case .paragraph:
                break
            }

            for span in plan.spans {
                switch span.kind {
                case .bold:
                    boldSpans += 1
                case .italic:
                    italicSpans += 1
                case .inlineCode:
                    inlineCodeSpans += 1
                case .link:
                    markdownLinks += 1
                case .automaticLink:
                    automaticLinks += 1
                case .markdownDelimiter:
                    break
                }
            }
        }
    }
}