import { describe, it, expect, beforeEach, afterEach } from "@jest/globals";
import { promises as fs } from "fs";
import os from "os";
import path from "path";
import { readSlide } from "../read_slide.js";
import { setActiveTheme } from "../../themes/index.js";
const FRONTMATTER = ["---", "marp: true", "theme: default", "---", ""].join("\n");
describe("readSlide", () => {
let tempDir: string;
beforeEach(async () => {
tempDir = await fs.mkdtemp(path.join(os.tmpdir(), "marp-read-slide-"));
setActiveTheme("default");
});
afterEach(async () => {
await fs.rm(tempDir, { recursive: true, force: true });
});
it("returns all slides when no slideId is provided", async () => {
const filePath = path.join(tempDir, "all.md");
const content = [
FRONTMATTER,
"<!-- slide-id: aaa-111 -->",
"",
"# Slide 1",
"",
"---",
"",
"<!-- slide-id: bbb-222 -->",
"",
"# Slide 2",
].join("\n");
await fs.writeFile(filePath, content, "utf-8");
const result = await readSlide({ filePath });
const data = JSON.parse(result.content[0].text);
expect(data.success).toBe(true);
expect(data.totalSlides).toBe(2);
expect(data.slides).toHaveLength(2);
expect(data.slides[0].slideId).toBe("aaa-111");
expect(data.slides[0].position).toBe(1);
expect(data.slides[1].slideId).toBe("bbb-222");
expect(data.slides[1].position).toBe(2);
});
it("returns a specific slide by ID", async () => {
const filePath = path.join(tempDir, "specific.md");
const content = [
FRONTMATTER,
"<!-- slide-id: aaa-111 -->",
"",
"# Slide 1",
"",
"---",
"",
"<!-- slide-id: bbb-222 -->",
"",
"# Slide 2",
].join("\n");
await fs.writeFile(filePath, content, "utf-8");
const result = await readSlide({ filePath, slideId: "bbb-222" });
const data = JSON.parse(result.content[0].text);
expect(data.success).toBe(true);
expect(data.slideId).toBe("bbb-222");
expect(data.position).toBe(2);
expect(data.content).toContain("# Slide 2");
});
it("returns error for non-existent slide ID", async () => {
const filePath = path.join(tempDir, "missing.md");
const content = [
FRONTMATTER,
"<!-- slide-id: aaa-111 -->",
"",
"# Slide 1",
].join("\n");
await fs.writeFile(filePath, content, "utf-8");
const result = await readSlide({ filePath, slideId: "non-existent" });
expect(result.isError).toBe(true);
expect(result.content[0].text).toContain("not found");
});
it("returns error for invalid file path", async () => {
const result = await readSlide({ filePath: "relative/path.md" });
expect(result.isError).toBe(true);
expect(result.content[0].text).toContain("absolute");
});
it("returns error for non-existent file", async () => {
const filePath = path.join(tempDir, "nonexistent.md");
const result = await readSlide({ filePath });
expect(result.isError).toBe(true);
expect(result.content[0].text).toContain("Could not read file");
});
});
