Module2 lesson1 testing library

examples/module1/lesson1/solver/App.tsx

@@ -1,58 +1,36 @@
-import React, { useState } from 'react';
-import { f1, f2, f3, f4 } from './functions';
+import { useState } from 'react';
+import { sum, sub, multiply, divide } from './functions';
+import Button from './components/Button';
+import Input from './components/Input';
 
 const App = () => {
-  const [numA, setNumA] = useState<number>(0);
-  const [numB, setNumB] = useState<number>(0);
-  const [numC, setNumC] = useState<number | string>(0);
+  const [firstDigit, setFirstDigit] = useState<number>(0);
+  const [secondDigit, setSecondDigit] = useState<number>(0);
+  const [result, setResult] = useState<number | string>(0);
 
   const doWork = (func: (a: number, b: number) => number) => {
-    setNumC(func(numA, numB));
+    setResult(func(firstDigit, secondDigit));
   };
 
   return (
     <div>
       <div className="grid grid-cols-2 gap-x-4">
-        <input
-          type="number"
-          className="rounded-md shadow-md p-4"
-          value={numA}
-          onChange={(e) => setNumA(parseFloat(e.target.value))}
+        <Input
+          value={firstDigit}
+          onChange={(e) => setFirstDigit(parseFloat(e.target.value))}
         />
-        <input
-          type="number"
-          className="rounded-md shadow-md p-4"
-          value={numB}
-          onChange={(e) => setNumB(parseFloat(e.target.value))}
+        <Input
+          value={secondDigit}
+          onChange={(e) => setSecondDigit(parseFloat(e.target.value))}
         />
       </div>
       <div className="grid grid-cols-4 gap-x-4 my-4">
-        <button
-          className="bg-blue-200 px-2 py-4 text-lg hover:bg-blue-500 hover:text-white rounded-md"
-          onClick={() => doWork(f1)}
-        >
-          +
-        </button>
-        <button
-          className="bg-blue-200 px-2 py-4 text-lg hover:bg-blue-500 hover:text-white rounded-md"
-          onClick={() => doWork(f2)}
-        >
-          -
-        </button>
-        <button
-          className="bg-blue-200 px-2 py-4 text-lg hover:bg-blue-500 hover:text-white rounded-md"
-          onClick={() => doWork(f3)}
-        >
-          *
-        </button>
-        <button
-          className="bg-blue-200 px-2 py-4 text-lg hover:bg-blue-500 hover:text-white rounded-md"
-          onClick={() => doWork(f4)}
-        >
-          /
-        </button>
+        <Button onClick={() => doWork(sum)}> + </Button>
+        <Button onClick={() => doWork(sub)}> - </Button>
+        <Button onClick={() => doWork(multiply)}> * </Button>
+        <Button onClick={() => doWork(divide)}> / </Button>
       </div>
-      <div>Result: {numC}</div>
+      <div>Result: {result}</div>
     </div>
   );
 };

examples/module1/lesson1/solver/components/Button.tsx

@@ -0,0 +1,20 @@
+import React from 'react';
+
+const Button = ({
+  children,
+  onClick,
+}: {
+  children: React.ReactNode;
+  onClick: () => void;
+}) => {
+  return (
+    <button
+      onClick={onClick}
+      className="bg-blue-200 px-2 py-4 text-lg hover:bg-blue-500 hover:text-white rounded-md"
+    >
+      {children}
+    </button>
+  );
+};
+
+export default Button;

examples/module1/lesson1/solver/components/Input.tsx

@@ -0,0 +1,14 @@
+import React from 'react';
+
+const Input = ({ value, onChange }: { value: any; onChange: any }) => {
+  return (
+    <input
+      type="number"
+      className="rounded-md shadow-md p-4"
+      value={value}
+      onChange={onChange}
+    />
+  );
+};
+
+export default Input;

examples/module1/lesson1/solver/functions.ts

@@ -1,13 +1,14 @@
-export function f1(a, b) {
+export function sum(a: number, b: number): number {
   return a + b;
 }
-export function f2(a, b) {
+export function sub(a: number, b: number): number {
   return a - b;
 }
-export function f3(a, b) {
+export function multiply(a: number, b: number): number {
   return a * b;
 }
 
-export function f4(a, b) {
+export function divide(a: number, b: number): number | string {
+  if (b === 0) return 'Cannot divide by zero';
   return a / b;
 }

examples/module1/lesson1/validate-it/index.html

@@ -1,37 +1,30 @@
 <!DOCTYPE html>
 <html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Validation - Demo App</title>
-    <script src="https://cdn.tailwindcss.com"></script>
-  </head>
-  <body class="bg-gray-100 p-4">
-    <div class="max-w-4xl mx-auto">
-      <div class="flex flex-col">
-        <input
-          class="rounded-md p-4 shadow-lg"
-          type="text"
-          id="input"
-          placeholder="Enter a number between 0 and 100"
-        />
-        <div class="grid grid-cols-2 gap-x-2">
-          <button
-            class="rounded-md text-lg bg-blue-200 hover:bg-blue-800 hover:text-white p-4 mt-4"
-            id="button"
-          >
-            Validate It!
-          </button>
-          <button
-            class="rounded-md text-lg bg-red-200 hover:bg-red-800 hover:text-white p-4 mt-4"
-            id="button2"
-          >
-            Clear!
-          </button>
-        </div>
-        <div class="text-lg mt-4" id="result"></div>
+
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Validation - Demo App</title>
+  <script src="https://cdn.tailwindcss.com"></script>
+</head>
+
+<body class="bg-gray-100 p-4">
+  <div class="max-w-4xl mx-auto">
+    <div class="flex flex-col">
+      <input class="rounded-md p-4 shadow-lg" type="text" id="input" placeholder="Enter a number between 0 and 100" />
+      <div class="grid grid-cols-2 gap-x-2">
+        <button class="rounded-md text-lg bg-blue-200 hover:bg-blue-800 hover:text-white p-4 mt-4"
+          id="onValidateButton">
+          Validate It!
+        </button>
+        <button class="rounded-md text-lg bg-red-200 hover:bg-red-800 hover:text-white p-4 mt-4" id="onCancelButton">
+          Clear!
+        </button>
       </div>
+      <div class="text-lg mt-4" id="result"></div>
     </div>
-    <script type="module" src="./index.js"></script>
-  </body>
-</html>
+  </div>
+  <script type="module" src="./index.ts"></script>
+</body>
+
+</html>

examples/module1/lesson1/validate-it/index.ts

@@ -0,0 +1,21 @@
+import { NUMBER_VALIDATORS } from './validator/validation_rule';
+import { validate } from './validator/validator';
+
+function main() {
+  const input: HTMLInputElement = document.getElementById('input')!;
+  const onValidate: HTMLElement = document.getElementById('onValidateButton')!;
+  const onCancel: HTMLElement = document.getElementById('onCancelButton')!;
+  const result: HTMLElement = document.getElementById('result')!;
+
+  onValidate.addEventListener('click', () => {
+    const validationMessage = validate(input.value, NUMBER_VALIDATORS);
+    result.innerHTML = validationMessage;
+  });
+
+  onCancel.addEventListener('click', () => {
+    input.value = '';
+    result.innerHTML = '';
+  });
+}
+
+main();

examples/module1/lesson1/validate-it/validator/validation_rule.ts

@@ -0,0 +1,15 @@
+export type ValidationRule = (input: number) => boolean;
+
+const isEven: ValidationRule = (input: number) => input % 2 === 0;
+const isGreaterThan = (boundary: number): ValidationRule => {
+  return (input: number) => input > boundary;
+};
+const isLessThan = (boundary: number): ValidationRule => {
+  return (input: number) => input < boundary;
+};
+
+export const NUMBER_VALIDATORS: ValidationRule[] = [
+  isEven,
+  isGreaterThan(0),
+  isLessThan(100),
+];

examples/module1/lesson1/validate-it/validator/validator.ts

@@ -0,0 +1,7 @@
+import { ValidationRule } from './validation_rule';
+
+export function validate(value: string, validators: ValidationRule[]) {
+  const isValid = validators.every((validates) => validates(Number(value)));
+  if (!isValid) return 'Invalid';
+  return 'Valid';
+}

examples/module1/lesson2/container-components/components/CharacterItem.tsx

@@ -0,0 +1,12 @@
+import { Character } from '../types/Character';
+
+const CharacterItem = ({ character }: { character: Character }) => {
+  return (
+    <li key={character.id} className="flex flex-col items-center">
+      <h3>{character.name}</h3>
+      <img src={character.image} alt={character.name} />
+    </li>
+  );
+};
+
+export default CharacterItem;

examples/module1/lesson2/container-components/components/CharacterList.tsx

@@ -1,13 +1,11 @@
 import { Character } from '../types/Character';
+import CharacterItem from './CharacterItem';
 
 function CharacterList({ characters }: { characters: Character[] }) {
   return (
     <ol className="grid grid-cols-1 gap-4 list-none md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4">
       {characters.map((character) => (
-        <li key={character.id} className="flex flex-col items-center">
-          <h3>{character.name}</h3>
-          <img src={character.image} alt={character.name} />
-        </li>
+        <CharacterItem character={character} key={character.id} />
       ))}
     </ol>
   );

examples/module1/lesson2/container-components/components/GenderSelect.tsx

@@ -0,0 +1,21 @@
+type GenderSelectProps = {
+  onChange: (event: React.ChangeEvent<HTMLSelectElement>) => void;
+  gender: string;
+};
+
+const GenderSelect = ({ onChange, gender }: GenderSelectProps) => {
+  return (
+    <label className="flex flex-col">
+      Gender
+      <select value={gender} onChange={onChange} className="border h-7 mt-1">
+        <option value="">Any Gender</option>
+        <option value="female">Female</option>
+        <option value="male">Male</option>
+        <option value="genderless">Genderless</option>
+        <option value="unknown">Unknown</option>
+      </select>
+    </label>
+  );
+};
+
+export default GenderSelect;

examples/module1/lesson2/container-components/components/NameField.tsx

@@ -0,0 +1,21 @@
+type NameFieldProps = {
+  onChange: (event: React.ChangeEvent<HTMLInputElement>) => void;
+  name: string;
+};
+
+const NameField = ({ onChange, name }: NameFieldProps) => {
+  return (
+    <label className="flex flex-col">
+      Name
+      <input
+        className="border h-7 mt-1 indent-2"
+        type="text"
+        placeholder="Rick Sanchez..."
+        value={name}
+        onChange={onChange}
+      />
+    </label>
+  );
+};
+
+export default NameField;