feat: improved validation error messages (#89)

Author: evilebottnawi

Diff for: .github/CONTRIBUTING.md

@@ -147,6 +147,14 @@ module. Thankfully, Github provides a means to do this. Add a dependency to the
 
 Where `{id}` is the # ID of your Pull Request.
 
+## Contributor License Agreement
+
+When submitting your contribution, a CLA (Contributor License Agreement) bot will come by to verify that you signed the [CLA](https://cla.js.foundation/webpack-contrib/cache-loader).
+If it is your first time, it will link you to the right place to sign it.
+However, if you have committed your contributions using an email that is not the same as your email used on GitHub, the CLA bot can't accept your contribution.
+
+Run `git config user.email` to see your Git email, and verify it with [your GitHub email](https://github.com/settings/emails).
+
 ## Thanks
 
 For your interest, time, understanding, and for following this simple guide.

Diff for: lint-staged.config.js

@@ -1,7 +1,4 @@
 module.exports = {
-  ignore: ['package-lock.json', 'CHANGELOG.md'],
-  linters: {
-    '*.js': ['prettier --write', 'eslint --fix', 'git add'],
-    '*.{json,md,yml,css}': ['prettier --write', 'git add'],
-  },
+  '*.js': ['prettier --write', 'eslint --fix', 'git add'],
+  '*.{json,md,yml,css}': ['prettier --write', 'git add'],
 };

Diff for: package-lock.json

@@ -42,39 +42,38 @@
     "loader-utils": "^1.2.3",
     "mkdirp": "^0.5.1",
     "neo-async": "^2.6.1",
-    "schema-utils": "^1.0.0"
+    "schema-utils": "^2.0.0"
   },
   "devDependencies": {
-    "@babel/cli": "^7.4.4",
-    "@babel/core": "^7.4.5",
-    "@babel/preset-env": "^7.4.5",
-    "@commitlint/cli": "^8.0.0",
-    "@commitlint/config-conventional": "^8.0.0",
-    "@webpack-contrib/defaults": "^5.0.0",
+    "@babel/cli": "^7.5.5",
+    "@babel/core": "^7.5.5",
+    "@babel/preset-env": "^7.5.5",
+    "@commitlint/cli": "^8.1.0",
+    "@commitlint/config-conventional": "^8.1.0",
+    "@webpack-contrib/defaults": "^5.0.2",
     "@webpack-contrib/eslint-config-webpack": "^3.0.0",
     "babel-jest": "^24.8.0",
     "babel-loader": "^8.0.6",
     "commitlint-azure-pipelines-cli": "^1.0.2",
     "cross-env": "^5.2.0",
-    "del": "^4.1.1",
+    "del": "^5.0.0",
     "del-cli": "^2.0.0",
-    "eslint": "^5.16.0",
-    "eslint-config-prettier": "^4.3.0",
-    "eslint-plugin-import": "^2.17.3",
-    "eslint-plugin-prettier": "^3.1.0",
-    "file-loader": "^4.0.0",
-    "husky": "^2.4.0",
+    "eslint": "^6.0.1",
+    "eslint-config-prettier": "^6.0.0",
+    "eslint-plugin-import": "^2.18.0",
+    "file-loader": "^4.1.0",
+    "husky": "^3.0.0",
     "jest": "^24.8.0",
     "jest-junit": "^6.4.0",
-    "lint-staged": "^8.1.7",
+    "lint-staged": "^9.2.0",
     "memory-fs": "^0.4.1",
     "normalize-path": "^3.0.0",
     "npm-run-all": "^4.1.5",
-    "prettier": "^1.17.1",
+    "prettier": "^1.18.2",
     "standard-version": "^6.0.1",
     "uuid": "^3.3.2",
-    "webpack": "^4.33.0",
-    "webpack-cli": "^3.3.2"
+    "webpack": "^4.36.1",
+    "webpack-cli": "^3.3.6"
   },
   "keywords": [
     "webpack"

Diff for: package.json

@@ -59,7 +59,11 @@ function roundMs(mtime, precision) {
 // to break watchpack -> chokidar watch logic  over webpack@4 --watch
 function loader(...args) {
   const options = Object.assign({}, defaults, getOptions(this));
-  validateOptions(schema, options, 'Cache Loader');
+
+  validateOptions(schema, options, {
+    name: 'Cache Loader',
+    baseDataPath: 'options',
+  });
 
   const { readOnly, write: writeFn } = options;
 
@@ -148,7 +152,10 @@ function loader(...args) {
 function pitch(remainingRequest, prevRequest, dataInput) {
   const options = Object.assign({}, defaults, getOptions(this));
 
-  validateOptions(schema, options, 'Cache Loader (Pitch)');
+  validateOptions(schema, options, {
+    name: 'Cache Loader (Pitch)',
+    baseDataPath: 'options',
+  });
 
   const {
     cacheContext,

Diff for: src/index.js

@@ -2,30 +2,39 @@
   "type": "object",
   "properties": {
     "cacheContext": {
+      "description": "The default cache context in order to generate the cache relatively to a path. By default it will use absolute paths.",
       "type": "string"
     },
     "cacheKey": {
+      "description": "Allows you to override default cache key generator.",
       "instanceof": "Function"
     },
     "cacheIdentifier": {
+      "description": "Provide a cache directory where cache items should be stored (used for default read/write implementation).",
       "type": "string"
     },
     "cacheDirectory": {
+      "description": "Provide an invalidation identifier which is used to generate the hashes. You can use it for extra dependencies of loaders (used for default read/write implementation).",
       "type": "string"
     },
     "compare": {
+      "description": "Allows you to override default comparison function between the cached dependency and the one is being read. Return true to use the cached resource.",
       "instanceof": "Function"
     },
     "precision": {
+      "description": "Round mtime by this number of milliseconds both for stats and deps before passing those params to the comparing function.",
       "type": "number"
     },
     "read": {
+      "description": "Allows you to override default read cache data from file.",
       "instanceof": "Function"
     },
     "readOnly": {
+      "description": "Allows you to override default value and make the cache read only (useful for some environments where you don't want the cache to be updated, only read from it).",
       "type": "boolean"
     },
     "write": {
+      "description": "Allows you to override default write cache data to file (e.g. Redis, memcached).",
       "instanceof": "Function"
     }
   },

Diff for: src/options.json

@@ -0,0 +1,25 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`validate options error (pitch) 1`] = `
+"Invalid options object. Cache Loader (Pitch) has been initialised using an options object that does not match the API schema.
+ - options.cacheIdentifier should be a string.
+   -> Provide a cache directory where cache items should be stored (used for default read/write implementation)."
+`;
+
+exports[`validate options error 1`] = `
+"Invalid options object. Cache Loader has been initialised using an options object that does not match the API schema.
+ - options.cacheIdentifier should be a string.
+   -> Provide a cache directory where cache items should be stored (used for default read/write implementation)."
+`;
+
+exports[`validate options unknown (pitch) 1`] = `
+"Invalid options object. Cache Loader (Pitch) has been initialised using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { cacheContext?, cacheKey?, cacheIdentifier?, cacheDirectory?, compare?, precision?, read?, readOnly?, write? }"
+`;
+
+exports[`validate options unknown 1`] = `
+"Invalid options object. Cache Loader has been initialised using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { cacheContext?, cacheKey?, cacheIdentifier?, cacheDirectory?, compare?, precision?, read?, readOnly?, write? }"
+`;

Diff for: test/__snapshots__/errors.test.js.snap

@@ -0,0 +1,35 @@
+import loader, { pitch } from '../src';
+
+// Needed for `schema-utils` to not call
+// process.exit(1) when running tests
+process.env.JEST = true;
+
+describe('validate options', () => {
+  test('error', () => {
+    const err = () => loader.call({ query: { cacheIdentifier: 1 } });
+
+    expect(err).toThrow();
+    expect(err).toThrowErrorMatchingSnapshot();
+  });
+
+  test('unknown', () => {
+    const err = () => loader.call({ query: { unknown: 'unknown' } });
+
+    expect(err).toThrow();
+    expect(err).toThrowErrorMatchingSnapshot();
+  });
+
+  test('error (pitch)', () => {
+    const err = () => pitch.call({ query: { cacheIdentifier: 1 } });
+
+    expect(err).toThrow();
+    expect(err).toThrowErrorMatchingSnapshot();
+  });
+
+  test('unknown (pitch)', () => {
+    const err = () => pitch.call({ query: { unknown: 'unknown' } });
+
+    expect(err).toThrow();
+    expect(err).toThrowErrorMatchingSnapshot();
+  });
+});