Add PHP Unit and basic Unit tests

.gitignore

@@ -1,3 +1,4 @@
 vendor/
 composer.lock
-.idea
+.idea
+.phpunit.result.cache

composer.json

@@ -18,5 +18,13 @@
         "psr-4": {
             "DivineOmega\\LaravelPasswordExposedValidationRule\\": "./src/"
         }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\": "tests/"
+        }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^8.0"
     }
 }

tests/Unit/PasswordExposedTest.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Tests\Unit;
+
+use PHPUnit\Framework\TestCase;
+use DivineOmega\LaravelPasswordExposedValidationRule\PasswordExposed;
+
+class PasswordExposedTest extends TestCase
+{
+    public function setUp() : void
+    {
+        $this->passwordExposed = new PasswordExposed();
+    }
+
+    /** @test */
+    public function defaultMessageIsReturned()
+    {
+        $message = $this->passwordExposed->message();
+        $this->assertEquals('The :attribute has been exposed in a data breach.', $message);
+    }
+
+    /** @test */
+    public function customMessageCanBeSet()
+    {
+        $customMessage = 'Custom message';
+        $passwordExposedObject = $this->passwordExposed->setMessage($customMessage);
+        $setMessage = $passwordExposedObject->message();
+        $this->assertEquals($customMessage, $setMessage);
+    }
+
+    /** @test */
+    public function passwordFailsValidation()
+    {
+        $password = 'password';
+        $passed = $this->passwordExposed->passes('password', $password);
+        $this->assertFalse($passed);
+    }
+
+    /** @test */
+    public function passwordPassesValidation()
+    {
+        $password = uniqid();
+        $passed = $this->passwordExposed->passes('password', $password);
+        $this->assertTrue($passed);
+    }
+}