co-mono/packages/tui/test/markdown.test.ts

import assert from "node:assert";
import { describe, it } from "node:test";
import chalk from "chalk";
import { Markdown } from "../src/components/markdown.js";
import { defaultMarkdownTheme } from "./test-themes.js";

describe("Markdown component", () => {
	describe("Nested lists", () => {
		it("should render simple nested list", () => {
			const markdown = new Markdown(
				`- Item 1
  - Nested 1.1
  - Nested 1.2
- Item 2`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);

			// Check that we have content
			assert.ok(lines.length > 0);

			// Strip ANSI codes for checking
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));

			// Check structure
			assert.ok(plainLines.some((line) => line.includes("- Item 1")));
			assert.ok(plainLines.some((line) => line.includes("  - Nested 1.1")));
			assert.ok(plainLines.some((line) => line.includes("  - Nested 1.2")));
			assert.ok(plainLines.some((line) => line.includes("- Item 2")));
		});

		it("should render deeply nested list", () => {
			const markdown = new Markdown(
				`- Level 1
  - Level 2
    - Level 3
      - Level 4`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));

			// Check proper indentation
			assert.ok(plainLines.some((line) => line.includes("- Level 1")));
			assert.ok(plainLines.some((line) => line.includes("  - Level 2")));
			assert.ok(plainLines.some((line) => line.includes("    - Level 3")));
			assert.ok(plainLines.some((line) => line.includes("      - Level 4")));
		});

		it("should render ordered nested list", () => {
			const markdown = new Markdown(
				`1. First
   1. Nested first
   2. Nested second
2. Second`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));

			assert.ok(plainLines.some((line) => line.includes("1. First")));
			assert.ok(plainLines.some((line) => line.includes("  1. Nested first")));
			assert.ok(plainLines.some((line) => line.includes("  2. Nested second")));
			assert.ok(plainLines.some((line) => line.includes("2. Second")));
		});

		it("should render mixed ordered and unordered nested lists", () => {
			const markdown = new Markdown(
				`1. Ordered item
   - Unordered nested
   - Another nested
2. Second ordered
   - More nested`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));

			assert.ok(plainLines.some((line) => line.includes("1. Ordered item")));
			assert.ok(plainLines.some((line) => line.includes("  - Unordered nested")));
			assert.ok(plainLines.some((line) => line.includes("2. Second ordered")));
		});
	});

	describe("Tables", () => {
		it("should render simple table", () => {
			const markdown = new Markdown(
				`| Name | Age |
| --- | --- |
| Alice | 30 |
| Bob | 25 |`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));

			// Check table structure
			assert.ok(plainLines.some((line) => line.includes("Name")));
			assert.ok(plainLines.some((line) => line.includes("Age")));
			assert.ok(plainLines.some((line) => line.includes("Alice")));
			assert.ok(plainLines.some((line) => line.includes("Bob")));
			// Check for table borders
			assert.ok(plainLines.some((line) => line.includes("│")));
			assert.ok(plainLines.some((line) => line.includes("─")));
		});

		it("should render table with alignment", () => {
			const markdown = new Markdown(
				`| Left | Center | Right |
| :--- | :---: | ---: |
| A | B | C |
| Long text | Middle | End |`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));

			// Check headers
			assert.ok(plainLines.some((line) => line.includes("Left")));
			assert.ok(plainLines.some((line) => line.includes("Center")));
			assert.ok(plainLines.some((line) => line.includes("Right")));
			// Check content
			assert.ok(plainLines.some((line) => line.includes("Long text")));
		});

		it("should handle tables with varying column widths", () => {
			const markdown = new Markdown(
				`| Short | Very long column header |
| --- | --- |
| A | This is a much longer cell content |
| B | Short |`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);

			// Should render without errors
			assert.ok(lines.length > 0);

			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));
			assert.ok(plainLines.some((line) => line.includes("Very long column header")));
			assert.ok(plainLines.some((line) => line.includes("This is a much longer cell content")));
		});
	});

	describe("Combined features", () => {
		it("should render lists and tables together", () => {
			const markdown = new Markdown(
				`# Test Document

- Item 1
  - Nested item
- Item 2

| Col1 | Col2 |
| --- | --- |
| A | B |`,
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));

			// Check heading
			assert.ok(plainLines.some((line) => line.includes("Test Document")));
			// Check list
			assert.ok(plainLines.some((line) => line.includes("- Item 1")));
			assert.ok(plainLines.some((line) => line.includes("  - Nested item")));
			// Check table
			assert.ok(plainLines.some((line) => line.includes("Col1")));
			assert.ok(plainLines.some((line) => line.includes("│")));
		});
	});

	describe("Pre-styled text (thinking traces)", () => {
		it("should preserve gray italic styling after inline code", () => {
			// This replicates how thinking content is rendered in assistant-message.ts
			const markdown = new Markdown(
				"This is thinking with `inline code` and more text after",
				1,
				0,
				defaultMarkdownTheme,
				{
					color: (text) => chalk.gray(text),
					italic: true,
				},
			);

			const lines = markdown.render(80);
			const joinedOutput = lines.join("\n");

			// Should contain the inline code block
			assert.ok(joinedOutput.includes("inline code"));

			// The output should have ANSI codes for gray (90) and italic (3)
			assert.ok(joinedOutput.includes("\x1b[90m"), "Should have gray color code");
			assert.ok(joinedOutput.includes("\x1b[3m"), "Should have italic code");

			// Verify that after the inline code (cyan text), we reapply gray italic
			const hasCyan = joinedOutput.includes("\x1b[36m"); // cyan
			assert.ok(hasCyan, "Should have cyan for inline code");
		});

		it("should preserve gray italic styling after bold text", () => {
			const markdown = new Markdown(
				"This is thinking with **bold text** and more after",
				1,
				0,
				defaultMarkdownTheme,
				{
					color: (text) => chalk.gray(text),
					italic: true,
				},
			);

			const lines = markdown.render(80);
			const joinedOutput = lines.join("\n");

			// Should contain bold text
			assert.ok(joinedOutput.includes("bold text"));

			// The output should have ANSI codes for gray (90) and italic (3)
			assert.ok(joinedOutput.includes("\x1b[90m"), "Should have gray color code");
			assert.ok(joinedOutput.includes("\x1b[3m"), "Should have italic code");

			// Should have bold codes (1 or 22 for bold on/off)
			assert.ok(joinedOutput.includes("\x1b[1m"), "Should have bold code");
		});
	});

	describe("HTML-like tags in text", () => {
		it("should render content with HTML-like tags as text", () => {
			// When the model emits something like <thinking>content</thinking> in regular text,
			// marked might treat it as HTML and hide the content
			const markdown = new Markdown(
				"This is text with <thinking>hidden content</thinking> that should be visible",
				0,
				0,
				defaultMarkdownTheme,
			);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));
			const joinedPlain = plainLines.join(" ");

			// The content inside the tags should be visible
			assert.ok(
				joinedPlain.includes("hidden content") || joinedPlain.includes("<thinking>"),
				"Should render HTML-like tags or their content as text, not hide them",
			);
		});

		it("should render HTML tags in code blocks correctly", () => {
			const markdown = new Markdown("```html\n<div>Some HTML</div>\n```", 0, 0, defaultMarkdownTheme);

			const lines = markdown.render(80);
			const plainLines = lines.map((line) => line.replace(/\x1b\[[0-9;]*m/g, ""));
			const joinedPlain = plainLines.join("\n");

			// HTML in code blocks should be visible
			assert.ok(
				joinedPlain.includes("<div>") && joinedPlain.includes("</div>"),
				"Should render HTML in code blocks",
			);
		});
	});
});