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`highlight.test.ts`

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06d5ffeClaude	1	import { describe, it, expect } from "bun:test";
	2	import { highlightCode } from "../lib/highlight";
	3
	4	describe("syntax highlighting", () => {
	5	it("should highlight TypeScript code", () => {
	6	const code = 'const x: number = 42;\nconsole.log(x);';
	7	const result = highlightCode(code, "index.ts");
	8
	9	expect(result.language).toBe("typescript");
	10	expect(result.html).toContain("hljs-");
	11	expect(result.html).toContain("42");
	12	});
	13
	14	it("should highlight Python code", () => {
	15	const code = 'def hello():\n print("hello world")';
	16	const result = highlightCode(code, "main.py");
	17
	18	expect(result.language).toBe("python");
	19	expect(result.html).toContain("hljs-");
	20	});
	21
	22	it("should highlight JSON", () => {
	23	const code = '{"key": "value", "count": 42}';
	24	const result = highlightCode(code, "config.json");
	25
	26	expect(result.language).toBe("json");
	27	expect(result.html).toContain("hljs-");
	28	});
	29
	30	it("should highlight Go code", () => {
	31	const code = 'package main\n\nimport "fmt"\n\nfunc main() {\n\tfmt.Println("hello")\n}';
	32	const result = highlightCode(code, "main.go");
	33
	34	expect(result.language).toBe("go");
	35	expect(result.html).toContain("hljs-");
	36	});
	37
	38	it("should highlight Rust code", () => {
	39	const code = 'fn main() {\n println!("hello");\n}';
	40	const result = highlightCode(code, "main.rs");
	41
	42	expect(result.language).toBe("rust");
	43	expect(result.html).toContain("hljs-");
	44	});
	45
	46	it("should handle unknown extensions gracefully", () => {
	47	const code = "just some plain text";
	48	const result = highlightCode(code, "readme.xyz");
	49
	50	// Should return escaped HTML
	51	expect(result.html).toContain("just some plain text");
	52	});
	53
	54	it("should escape HTML in plain text", () => {
	55	const code = '<script>alert("xss")</script>';
	56	const result = highlightCode(code, "file.xyz");
	57
	58	expect(result.html).not.toContain("<script>");
	59	expect(result.html).toContain("<script>");
	60	});
	61
	62	it("should highlight CSS", () => {
	63	const code = "body { color: red; font-size: 14px; }";
	64	const result = highlightCode(code, "style.css");
	65
	66	expect(result.language).toBe("css");
	67	expect(result.html).toContain("hljs-");
	68	});
	69
	70	it("should highlight SQL", () => {
	71	const code = "SELECT * FROM users WHERE id = 1;";
	72	const result = highlightCode(code, "query.sql");
	73
	74	expect(result.language).toBe("sql");
	75	expect(result.html).toContain("hljs-");
	76	});
	77
	78	it("should highlight Dockerfile", () => {
	79	const code = "FROM node:20\nRUN npm install\nCMD [\"node\", \"index.js\"]";
	80	const result = highlightCode(code, "Dockerfile");
	81
	82	// Dockerfile extension is lowercase 'dockerfile'
	83	expect(result.html).toContain("node");
	84	});
	85	});