Integration testing with IPFS

Help
1

I’m building a library that will read/write to IPFS and I need to setup an integration test suite for it.

This is what I currently have (using Jest):

const IPFS = require("ipfs");

describe("IPFS integration", () => {
  let node;

  const startNode = () =>
    new Promise(resolve => {
      node = new IPFS();
      node.on("ready", resolve);
      node.on("error", (err) => console.error(err));
    });

  const stopNode = async () => {
    await node.stop();
  };

  beforeAll(() => startNode());
  afterAll(() => stopNode());

  it("should show the IPFS node to be online", () => {
    expect(node.isOnline()).toBe(true);
  });
});

And this is the error that I get from my CI (node.isOnline() actually returns false):

  console.error src/storage/ipfs/test/integration.ts:11
    Error: No resolver found for codec "undefined"
        at IPLDResolver.put (/home/travis/build/ethpm/ethpm.js/node_modules/ipld/src/index.js:221:23)
        at DAGNode.create (/home/travis/build/ethpm/ethpm.js/node_modules/ipfs/src/core/components/object.js:137:20)
        at multihashing (/home/travis/build/ethpm/ethpm.js/node_modules/ipfs/node_modules/ipld-dag-pb/src/dag-node/create.js:53:7)
        at Multihashing.Multihashing.digest (/home/travis/build/ethpm/ethpm.js/node_modules/multihashing-async/src/index.js:33:5)
        at setImmediate (/home/travis/build/ethpm/ethpm.js/node_modules/multihashing-async/src/utils.js:8:7)
        at Immediate.<anonymous> (/home/travis/build/ethpm/ethpm.js/node_modules/async/internal/setImmediate.js:27:16)
        at runCallback (timers.js:810:20)
        at tryOnImmediate (timers.js:768:5)
        at processImmediate [as _immediateCallback] (timers.js:745:5)
  console.error node_modules/jest-jasmine2/build/jasmine/Env.js:157
    Unhandled error
  console.error node_modules/jest-jasmine2/build/jasmine/Env.js:158
    Error: second argument must be a CID
        at new Block (/home/travis/build/ethpm/ethpm.js/node_modules/ipfs-block/src/index.js:23:13)
        at new Block (/home/travis/build/ethpm/ethpm.js/node_modules/class-is/index.js:15:17)
        at store.get (/home/travis/build/ethpm/ethpm.js/node_modules/ipfs-repo/src/blockstore.js:84:24)
        at fs.readFile (/home/travis/build/ethpm/ethpm.js/node_modules/datastore-fs/src/index.js:218:7)
        at /home/travis/build/ethpm/ethpm.js/node_modules/graceful-fs/graceful-fs.js:78:16
        at /home/travis/build/ethpm/ethpm.js/node_modules/graceful-fs/graceful-fs.js:78:16
        at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:511:3)

Is there a better way to test integration with IPFS?

2

I think this error comes from running different tests on the same repo. If you use new IPFS() without any options, it will use a default repo. You probably want to pass in repo: 'some/random/path.

Besides that I think isOnline doesn’t work as you’re missing an await on starting the node. Here’s the script I was running (adding the await), which logged true:

const IPFS = require("ipfs");

const main = async () => {
  let node;

  const startNode = () =>
    new Promise(resolve => {
      node = new IPFS({repo: '/tmp/randompath'});
      node.on("ready", resolve);
      node.on("error", (err) => console.error(err));
    });

  const stopNode = async () => {
    await node.stop();
  };

  await startNode();
  console.log(node.isOnline());
  stopNode();
}