test: cover workspace file services

src/server/workspaces/fileContentService.test.ts

@@ -0,0 +1,70 @@
+import { mkdtemp, mkdir, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { readWorkspaceFile } from "./fileContentService.js";
+
+const roots: string[] = [];
+
+async function tempWorkspace(): Promise<string> {
+  const root = await mkdtemp(join(tmpdir(), "pi-web-file-content-"));
+  roots.push(root);
+  return root;
+}
+
+afterEach(async () => {
+  await Promise.all(roots.splice(0).map((root) => rm(root, { recursive: true, force: true })));
+});
+
+describe("readWorkspaceFile", () => {
+  it("reads text files with normalized paths and language metadata", async () => {
+    const root = await tempWorkspace();
+    await mkdir(join(root, "src"));
+    await writeFile(join(root, "src", "main.ts"), "const answer = 42;\n");
+
+    const file = await readWorkspaceFile(root, "./src//main.ts");
+
+    expect(file).toMatchObject({
+      path: "src/main.ts",
+      language: "typescript",
+      encoding: "utf8",
+      content: "const answer = 42;\n",
+      truncated: false,
+      binary: false,
+    });
+    expect(file.size).toBe(19);
+    expect(Date.parse(file.modifiedAt)).not.toBeNaN();
+  });
+
+  it("rejects missing paths, directories, traversal, and absolute paths", async () => {
+    const root = await tempWorkspace();
+    await mkdir(join(root, "dir"));
+
+    await expect(readWorkspaceFile(root, undefined)).rejects.toThrow("path query parameter is required");
+    await expect(readWorkspaceFile(root, "dir")).rejects.toThrow("Path is not a file");
+    await expect(readWorkspaceFile(root, "../secret.txt")).rejects.toThrow("Path traversal is not allowed");
+    await expect(readWorkspaceFile(root, "/etc/passwd")).rejects.toThrow("Absolute paths are not allowed");
+  });
+
+  it("detects binary files and omits binary content", async () => {
+    const root = await tempWorkspace();
+    await writeFile(join(root, "image.bin"), Buffer.from([0x66, 0x6f, 0x00, 0x6f]));
+
+    const file = await readWorkspaceFile(root, "image.bin");
+
+    expect(file).toMatchObject({ content: "", binary: true, truncated: false });
+    expect(file.size).toBe(4);
+  });
+
+  it("truncates large text files", async () => {
+    const root = await tempWorkspace();
+    await writeFile(join(root, "large.md"), "a".repeat(512 * 1024 + 7));
+
+    const file = await readWorkspaceFile(root, "large.md");
+
+    expect(file.language).toBe("markdown");
+    expect(file.content).toHaveLength(512 * 1024);
+    expect(file.truncated).toBe(true);
+    expect(file.binary).toBe(false);
+  });
+});