issue_comments: 752777744
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| html_url | issue_url | id | node_id | user | created_at | updated_at | author_association | body | reactions | issue | performed_via_github_app |
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| https://github.com/simonw/datasette/issues/1165#issuecomment-752777744 | https://api.github.com/repos/simonw/datasette/issues/1165 | 752777744 | MDEyOklzc3VlQ29tbWVudDc1Mjc3Nzc0NA== | 9599 | 2020-12-30T22:30:24Z | 2020-12-30T22:30:24Z | OWNER | https://www.valentinog.com/blog/jest/ was useful. I created a `static/__tests__` folder and added this file as `plugins.spec.js`: ```javascript const datasette = require("../plugins.js"); describe("Datasette Plugins", () => { test("it should have datasette.plugins", () => { expect(!!datasette.plugins).toEqual(true); }); test("registering a plugin should work", () => { datasette.plugins.register("numbers", (a, b) => a + b, ["a", "b"]); var result = datasette.plugins.call("numbers", { a: 1, b: 2 }); expect(result).toEqual([3]); datasette.plugins.register("numbers", (a, b) => a * b, ["a", "b"]); var result2 = datasette.plugins.call("numbers", { a: 1, b: 2 }); expect(result2).toEqual([3, 2]); }); }); ``` In `static/plugins.js` I put this: ```javascript var datasette = datasette || {}; datasette.plugins = (() => { var registry = {}; return { register: (hook, fn, parameters) => { if (!registry[hook]) { registry[hook] = []; } registry[hook].push([fn, parameters]); }, call: (hook, args) => { args = args || {}; var results = []; (registry[hook] || []).forEach(([fn, parameters]) => { /* Call with the correct arguments */ var result = fn.apply(fn, parameters.map(parameter => args[parameter])); if (result !== undefined) { results.push(result); } }); return results; } }; })(); module.exports = datasette; ``` Note the `module.exports` line at the end. Then inside `static/` I ran the following command: ``` % npx jest -c '{}' PASS __tests__/plugins.spec.js Datasette Plugins ✓ it should have datasette.plugins (3 ms) ✓ registering a plugin should work (1 ms) Test Suites: 1 passed, 1 total Tests: 2 passed, 2 total Snapshots: 0 total Time: 1.163 s Ran all test suites. ``` The `-c {}` was necessary because I didn't have a Jest configuration or a `package.json`. | {"total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | 776635426 |