Add tests for declaform.

jest.config.js

@@ -0,0 +1,11 @@
+const { createDefaultPreset } = require("ts-jest");
+
+const tsJestTransformCfg = createDefaultPreset().transform;
+
+/** @type {import("jest").Config} **/
+module.exports = {
+  testEnvironment: "jsdom",
+  transform: {
+    ...tsJestTransformCfg,
+  },
+};

package.json

@@ -4,11 +4,15 @@
   "description": "A collection of useful web components and functionality.",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "npx jest"
   },
   "author": "Austin Smith",
   "license": "ISC",
   "devDependencies": {
+    "@types/jest": "^30.0.0",
+    "jest": "^30.2.0",
+    "jest-environment-jsdom": "^30.2.0",
+    "ts-jest": "^29.4.5",
     "typescript": "^5.9.2"
   }
 }

src/declaform/declaform.ts

@@ -35,7 +35,7 @@ class Field {
         return this._name;
     }
 
-    get value() {
+    get value(): string | string[] | undefined {
         switch(this._type) {
             case 'checkbox':
                 return (this._inputs as HTMLInputElement[]).filter(x => x.checked).map(x => x.value);
@@ -54,7 +54,30 @@ class Field {
         }
     }
 
-    set value(x: any) {
+    set value(val: string) {
+        switch(this._type) {
+            case 'radio':
+            case 'checkbox':
+                (this._inputs as HTMLInputElement[])
+                .forEach(input => {
+                    if (input.value === val) {
+                        input.setAttribute('checked', '');
+                    } else {
+                        input.removeAttribute('checked');
+                    }
+                });
+                break;
+            default:
+            case 'date':
+            case 'datatime-local':
+            case 'email':
+            case 'number':
+            case 'password':
+            case 'select':
+            case 'text':
+                this._inputs.forEach(x => x.value = val);
+                break;
+        }
     }
 
     get type() {
@@ -121,10 +144,12 @@ export class Declaform extends HTMLElement {
         for (const [name, inputs] of inputGroups.entries()) {
             this._fields.push(new Field(name, inputs))
         }
+        /*
         const src = this.getAttribute('src');
         if (src) {
             this.hydrateForm(src);
         }
+        */
     }
 
     get form() {
@@ -135,7 +160,7 @@ export class Declaform extends HTMLElement {
         return this._fields;
     }
 
-    toJSON() {
+    toObject() {
         const setProperty = (obj: Record<string, any>, name: string, value: any) => {
             const [current, children] = name.split('.');
             if (!current) {
@@ -156,12 +181,11 @@ export class Declaform extends HTMLElement {
         return obj;
     }
 
-    private async hydrateForm(endpoint: string) {
-        const response = await fetch(endpoint);
-        const obj = await response.json();
+    hydrate(obj: Record<string, any>) {
         const populateFields = (current: Record<string, any>, path: string) => {
             for (const key of Object.keys(current)) {
                 const value = current[key];
+                console.log(`Visiting ${key} with value ${value}`)
                 const propPath = (path.length) ? `${path}.${key}` : key;
                 if (typeof value !== 'object') {
                     const fields = this.fields.filter(x => x.name === propPath);

src/declaform/tests/declaform.test.ts

@@ -0,0 +1,120 @@
+//import '../declaform';
+import { Declaform } from '../declaform';
+
+const MOVIE_FORM = `
+<decla-form id="form">
+    <form slot="form">
+        <div class="input-group">
+            <label for="name">Name</label>
+            <input id="name" name="name" />
+        </div>
+        <select id="genre" name="genre">
+            <option value="comedy">Comedy</option>
+            <option value="horror">Horror</option>
+        </select>
+        <fieldset>
+            <legend>Rating</legend>
+            <div class="input-group">
+                <label for="rating-type-user">Type</label>
+                <input id="rating-type-user" name="rating.type" type="radio" value="user" />
+            </div>
+            <div class="input-group">
+                <label for="rating-type-critic">Type</label>
+                <input id="rating-type-critic" name="rating.type" type="radio" value="critic" />
+            </div>
+            <div class="input-group">
+                <label for="rating-score">Score</label>
+                <input id="rating-score" name="rating.score" type="number" />
+            </div>
+        </fieldset>
+        <button type="submit">Submit</button>
+    </form>
+</decla-form>
+`;
+
+describe('Declaform', () => {
+    it('Should mount.', () => {
+        document.body.innerHTML = MOVIE_FORM;
+        expect(document.getElementById('form')).toBeTruthy();
+    })
+
+    it('.toObject() should serialize form into a JS object', () => {
+        document.body.innerHTML = MOVIE_FORM;
+        const form = document.getElementById('form') as Declaform;
+        setInputValue('name', 'Monty Python');
+        setInputValue('genre', 'comedy');
+        setRadioValue('rating.type', 'user');
+        setInputValue('rating-score', '5');
+        const obj = form.toObject();
+        expect(obj).toMatchObject({
+            name: 'Monty Python',
+            genre: 'comedy',
+            rating: {
+                score: 5,
+                type: 'user',
+            },
+        });
+    });
+
+    it('.hydrate() should populate input fields from a JS object', () => {
+        document.body.innerHTML = MOVIE_FORM;
+        const form = document.getElementById('form') as Declaform;
+        form.hydrate({
+            name: 'Jaws',
+            genre: 'horror',
+            rating: {
+                score: 5,
+                type: 'critic',
+            }
+        });
+        const obj = form.toObject();
+        expect(obj).toMatchObject({
+            name: 'Jaws',
+            genre: 'horror',
+            rating: {
+                score: 5,
+                type: 'critic',
+            }
+        })
+    })
+});
+
+function setInputValue(id: string, value: string) {
+    const input = document.getElementById(id);
+    if (!input) {
+        throw new Error(`No input with id "${id}"!`);
+    }
+    if (!('value' in input)) {
+        throw new Error(`Tag with id "${id}" does not have "value" attribute!`);
+    }
+    input.value = value;
+}
+
+function getInputValue(id: string) {
+    const input = document.getElementById(id);
+    if (!input) {
+        throw new Error(`No input with id "${id}"!`);
+    }
+    if (!('value' in input)) {
+        throw new Error(`Tag with id "${id}" does not have "value" attribute!`);
+    }
+    return input.value;
+}
+
+function setRadioValue(name: string, value: string) {
+    const radios = document.querySelectorAll(`[name="${name}"]`);
+    if (!radios) {
+        throw new Error(`No radios with name "${name}"!`);
+    }
+    radios.forEach(radio => { 
+        if (!('value' in radio)) {
+            throw new Error('Radio option does not have "value" attribute!');
+        }
+        radio.removeAttribute('checked');
+    })
+    const option = ([...radios] as HTMLInputElement[]).find(x => x.value);
+    if (!option) {
+        throw new Error(`No option with value "${value}"`);
+    }
+    option.setAttribute('checked', '');
+}

tsconfig.json

@@ -7,6 +7,7 @@
 
     // Environment Settings
     // See also https://aka.ms/tsconfig/module
+    "esModuleInterop": true,
     "module": "esnext",
     "target": "es6",
     "types": [],
@@ -40,5 +41,6 @@
     "noUncheckedSideEffectImports": true,
     "moduleDetection": "force",
     "skipLibCheck": true,
-  }
+  },
+  "exclude": ["./src/**/*.test.ts"]
 }