test(packages): add package-smoke.test.ts

packages/ast-grep-mcp/src/package-smoke.test.ts

@@ -0,0 +1,48 @@
+import { describe, expect, it } from "bun:test";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+
+type PackageJson = {
+  readonly name: string;
+  readonly type: string;
+  readonly bin: Record<string, string>;
+};
+
+function readPackageJson(path: string): PackageJson {
+  const parsed: unknown = JSON.parse(readFileSync(path, "utf8"));
+  if (!isPackageJson(parsed)) throw new TypeError(`Invalid package metadata: ${path}`);
+  return parsed;
+}
+
+describe("package metadata", () => {
+  it("#given packaged ast-grep MCP files #when validating entrypoints #then package metadata exposes the omo CLI", () => {
+    // given
+    const packageJson = readPackageJson(fileURLToPath(new URL("../package.json", import.meta.url)));
+    const cliSource = readFileSync(fileURLToPath(new URL("cli.ts", import.meta.url)), "utf8");
+
+    // then
+    expect(packageJson.name).toBe("@oh-my-opencode/ast-grep-mcp");
+    expect(packageJson.type).toBe("module");
+    expect(packageJson.bin["omo-ast-grep"]).toBe("dist/cli.js");
+    expect(packageJson.bin["ast-grep-mcp"]).toBeUndefined();
+    expect(cliSource.startsWith("#!/usr/bin/env node")).toBe(true);
+    expect(cliSource).toContain("Usage: omo-ast-grep [mcp]");
+  });
+});
+
+function isPackageJson(value: unknown): value is PackageJson {
+  return (
+    isRecord(value) &&
+    value["name"] === "@oh-my-opencode/ast-grep-mcp" &&
+    value["type"] === "module" &&
+    isStringRecord(value["bin"])
+  );
+}
+
+function isStringRecord(value: unknown): value is Record<string, string> {
+  return isRecord(value) && Object.values(value).every((item) => typeof item === "string");
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value);
+}