n8n/packages/core/test/NodeExecuteFunctions.test.ts

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import { join } from 'path';
import { tmpdir } from 'os';
import { readFileSync, mkdtempSync } from 'fs';
import { BinaryDataManager, NodeExecuteFunctions } from '../src';
import { IBinaryData, ITaskDataConnections } from 'n8n-workflow';
const temporaryDir = mkdtempSync(join(tmpdir(), 'n8n'));
describe('NodeExecuteFunctions', () => {
describe(`test binary data helper methods`, () => {
// Reset BinaryDataManager for each run. This is a dirty operation, as individual managers are not cleaned.
beforeEach(() => {
//@ts-ignore
BinaryDataManager.instance = undefined;
});
test(`test getBinaryDataBuffer(...) & setBinaryDataBuffer(...) methods in 'default' mode`, async () => {
// Setup a 'default' binary data manager instance
await BinaryDataManager.init({
mode: 'default',
availableModes: 'default',
localStoragePath: temporaryDir,
binaryDataTTL: 1,
persistedBinaryDataTTL: 1,
});
// Set our binary data buffer
let inputData: Buffer = Buffer.from('This is some binary data', 'utf8');
let setBinaryDataBufferResponse: IBinaryData = await NodeExecuteFunctions.setBinaryDataBuffer(
{
mimeType: 'txt',
data: 'This should be overwritten by the actual payload in the response',
},
inputData,
'executionId',
);
// Expect our return object to contain the base64 encoding of the input data, as it should be stored in memory.
expect(setBinaryDataBufferResponse.data).toEqual(inputData.toString('base64'));
// Now, re-fetch our data.
// An ITaskDataConnections object is used to share data between nodes. The top level property, 'main', represents the successful output object from a previous node.
let taskDataConnectionsInput: ITaskDataConnections = {
main: [],
};
// We add an input set, with one item at index 0, to this input. It contains an empty json payload and our binary data.
taskDataConnectionsInput.main.push([
{
json: {},
binary: {
data: setBinaryDataBufferResponse,
},
},
]);
// Now, lets fetch our data! The item will be item index 0.
let getBinaryDataBufferResponse: Buffer = await NodeExecuteFunctions.getBinaryDataBuffer(
taskDataConnectionsInput,
0,
'data',
0,
);
expect(getBinaryDataBufferResponse).toEqual(inputData);
});
test(`test getBinaryDataBuffer(...) & setBinaryDataBuffer(...) methods in 'filesystem' mode`, async () => {
// Setup a 'filesystem' binary data manager instance
await BinaryDataManager.init({
mode: 'filesystem',
availableModes: 'filesystem',
localStoragePath: temporaryDir,
binaryDataTTL: 1,
persistedBinaryDataTTL: 1,
});
// Set our binary data buffer
let inputData: Buffer = Buffer.from('This is some binary data', 'utf8');
let setBinaryDataBufferResponse: IBinaryData = await NodeExecuteFunctions.setBinaryDataBuffer(
{
mimeType: 'txt',
data: 'This should be overwritten with the name of the configured data manager',
},
inputData,
'executionId',
);
// Expect our return object to contain the name of the configured data manager.
expect(setBinaryDataBufferResponse.data).toEqual('filesystem');
// Ensure that the input data was successfully persisted to disk.
expect(
readFileSync(
`${temporaryDir}/${setBinaryDataBufferResponse.id?.replace('filesystem:', '')}`,
),
).toEqual(inputData);
// Now, re-fetch our data.
// An ITaskDataConnections object is used to share data between nodes. The top level property, 'main', represents the successful output object from a previous node.
let taskDataConnectionsInput: ITaskDataConnections = {
main: [],
};
// We add an input set, with one item at index 0, to this input. It contains an empty json payload and our binary data.
taskDataConnectionsInput.main.push([
{
json: {},
binary: {
data: setBinaryDataBufferResponse,
},
},
]);
// Now, lets fetch our data! The item will be item index 0.
let getBinaryDataBufferResponse: Buffer = await NodeExecuteFunctions.getBinaryDataBuffer(
taskDataConnectionsInput,
0,
'data',
0,
);
expect(getBinaryDataBufferResponse).toEqual(inputData);
});
});
});