Node Generator

import { Node } from "@dafthunk/types";
import { describe, expect, it } from "vitest";
import { NodeContext } from "../../runtime/node-types";
import { [NodeClassName]Node } from "./<node-id>";

describe("[NodeClassName]Node", () => {
  const createContext = (inputs: Record<string, unknown>): NodeContext => ({
    nodeId: "[node-id]",
    inputs,
    getIntegration: async () => { throw new Error("No integrations in test"); },
    env: {},
  } as unknown as NodeContext);

  it("should [perform expected operation]", async () => {
    const node = new [NodeClassName]Node({ nodeId: "[node-id]" } as unknown as Node);
    const result = await node.execute(createContext({ input1: "test value" }));

    expect(result.status).toBe("completed");
    expect(result.outputs?.output1).toBe("expected value");
  });

  it("should handle empty input", async () => {
    const node = new [NodeClassName]Node({ nodeId: "[node-id]" } as unknown as Node);
    const result = await node.execute(createContext({ input1: "" }));

    expect(result.status).toBe("completed");
  });

  it("should return error for missing input", async () => {
    const node = new [NodeClassName]Node({ nodeId: "[node-id]" } as unknown as Node);
    const result = await node.execute(createContext({}));

    expect(result.status).toBe("error");
    expect(result.error).toContain("Missing required input");
  });

  it("should return error for invalid type", async () => {
    const node = new [NodeClassName]Node({ nodeId: "[node-id]" } as unknown as Node);
    const result = await node.execute(createContext({ input1: 123 }));

    expect(result.status).toBe("error");
    expect(result.error).toContain("Invalid input type");
  });

  it("should handle array of inputs", async () => {
    const node = new [NodeClassName]Node({ nodeId: "[node-id]" } as unknown as Node);
    const result = await node.execute(createContext({ input1: ["val1", "val2"] }));

    expect(result.status).toBe("completed");
  });

  it("should return error for invalid element in array", async () => {
    const node = new [NodeClassName]Node({ nodeId: "[node-id]" } as unknown as Node);
    const result = await node.execute(createContext({ input1: ["valid", 123] }));

    expect(result.status).toBe("error");
    expect(result.error).toContain("position 1");
  });
});

import { [NodeClassName]Node } from "./<category>/<node-id>";

this.registerImplementation([NodeClassName]Node);

pnpm typecheck
pnpm --filter '@dafthunk/api' test <node-id>

if (typeof values === "string") { /* handle single */ }
if (Array.isArray(values)) { /* validate each element */ }

const num = Number(input);
if (isNaN(num)) { return this.createErrorResult("Invalid number"); }

const { required, optional = "default" } = context.inputs;

try {
  const result = library.function(input);
} catch (err) {
  return this.createErrorResult(`Operation failed: ${(err as Error).message}`);
}