mocha (#295)

* mocha

* drop Node 12.x from CI

Author: mbostock

.eslintrc.json

@@ -2,17 +2,19 @@
   "extends": "eslint:recommended",
   "parserOptions": {
     "sourceType": "module",
-    "ecmaVersion": 8
+    "ecmaVersion": 2020
   },
   "env": {
-    "browser": true,
     "es6": true,
-    "node": true
+    "node": true,
+    "browser": true
   },
   "rules": {
-    "semi": 2,
-    "no-process-env": 2,
     "no-cond-assign": 0,
-    "no-redeclare": 0
+    "no-constant-condition": 0,
+    "no-sparse-arrays": 0,
+    "no-unexpected-multiline": 0,
+    "comma-dangle": ["error", "never"],
+    "semi": [2, "always"]
   }
 }

.github/workflows/nodejs.yml

@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [14.x, 16.x]
 
     runs-on: ${{ matrix.os }}
 

.prettierrc

@@ -1,3 +1,4 @@
 {
-  "bracketSpacing": false
+  "bracketSpacing": false,
+  "trailingComma": "none"
 }

package.json

@@ -3,7 +3,7 @@
   "version": "3.19.5",
   "license": "ISC",
   "main": "dist/stdlib.js",
-  "module": "src/index.js",
+  "module": "src/index.mjs",
   "author": {
     "name": "Observable, Inc.",
     "url": "https://observablehq.com"
@@ -13,25 +13,25 @@
     "url": "https://github.com/observablehq/stdlib.git"
   },
   "scripts": {
-    "test": "tap 'test/**/*-test.js' --reporter classic",
+    "test": "mocha 'test/**/*-test.mjs' && eslint src test --ext mjs",
     "prepublishOnly": "rollup -c",
     "postpublish": "git push && git push --tags"
   },
   "files": [
-    "src/**/*.js",
+    "src/**/*.mjs",
     "dist/**/*.js"
   ],
   "dependencies": {
     "d3-dsv": "^2.0.0",
     "d3-require": "^1.3.0"
   },
   "devDependencies": {
-    "eslint": "^7.18.0",
+    "@rollup/plugin-node-resolve": "^13.3.0",
+    "eslint": "^8.18.0",
     "exceljs": "^4.3.0",
+    "mocha": "^10.0.0",
     "node-fetch": "^2.6.1",
     "rollup": "^2.37.1",
-    "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-terser": "^7.0.2",
-    "tap": "^14.11.0"
+    "rollup-plugin-terser": "^7.0.2"
   }
 }

rollup.config.js

@@ -1,12 +1,12 @@
-import node from "rollup-plugin-node-resolve";
+import node from "@rollup/plugin-node-resolve";
 import {terser} from "rollup-plugin-terser";
 import * as meta from "./package.json";
 
 const copyright = `// @observablehq/stdlib v${meta.version} Copyright ${(new Date).getFullYear()} Observable, Inc.`;
 
 export default [
   {
-    input: "src/index.js",
+    input: "src/index.mjs",
     plugins: [
       node(),
       terser({

src/dependencies.js renamed to src/dependencies.mjs

@@ -1,4 +1,4 @@
-import dependency from "./dependency.js";
+import dependency from "./dependency.mjs";
 export const d3 = dependency("d3", "7.5.0", "dist/d3.min.js");
 export const inputs = dependency("@observablehq/inputs", "0.10.4", "dist/inputs.min.js");
 export const plot = dependency("@observablehq/plot", "0.5.1", "dist/plot.umd.min.js");