test: add tests for dasel, pandoc and vtracer

tests/converters/dasel.test.ts

@@ -0,0 +1,72 @@
+import fs from "fs";
+import { beforeEach, afterEach, expect, test, describe } from "bun:test";
+import { convert } from "../../src/converters/dasel";
+import type { ExecFileFn } from "../../src/converters/types";
+
+const originalWriteFile = fs.writeFile;
+
+describe("convert", () => {
+  let mockExecFile: ExecFileFn;
+
+  beforeEach(() => {
+    // mock fs.writeFile
+    // @ts-expect-error: property __promisify__ is missing
+    fs.writeFile = (path, data, cb) => cb(null);
+    // mock execFile
+    mockExecFile = (cmd, args, callback) => callback(null, "output-data", "");
+  });
+
+  afterEach(() => {
+    // reset fs.writeFile
+    fs.writeFile = originalWriteFile;
+  });
+
+  test("should call dasel with correct arguments and write output", async () => {
+    let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
+    mockExecFile = (cmd, args, callback) => {
+      calledArgs = [cmd, args, callback];
+      callback(null, "output-data", "");
+    };
+
+    let writeFileCalled = false;
+    // @ts-expect-error: property __promisify__ is missing
+    fs.writeFile = (path, data, cb) => {
+      writeFileCalled = true;
+      expect(path).toBe("output.json");
+      expect(data).toBe("output-data");
+      // @ts-expect-error: could not be callable with null
+      cb(null);
+    };
+
+    const result = await convert(
+      "input.yaml",
+      "yaml",
+      "json",
+      "output.json",
+      undefined,
+      mockExecFile,
+    );
+
+    expect(calledArgs[0]).toBe("dasel");
+    expect(calledArgs[1]).toEqual(["--file", "input.yaml", "--read", "yaml", "--write", "json"]);
+    expect(writeFileCalled).toBe(true);
+    expect(result).toBe("Done");
+  });
+
+  test("should reject if execFile returns an error", async () => {
+    mockExecFile = (cmd, args, callback) => callback(new Error("fail"), "", "");
+    expect(
+      convert("input.yaml", "yaml", "json", "output.json", undefined, mockExecFile),
+    ).rejects.toMatch(/error: Error: fail/);
+  });
+
+  test("should reject if writeFile fails", async () => {
+    // @ts-expect-error: property __promisify__ is missing
+    fs.writeFile = (path, data, cb) => cb(new Error("write fail"));
+    expect(
+      convert("input.yaml", "yaml", "json", "output.json", undefined, (cmd, args, cb) =>
+        cb(null, "output-data", ""),
+      ),
+    ).rejects.toMatch(/Failed to write output/);
+  });
+});