Merge pull request #40 from paulotokimatu/fix/specify-error-in-dateti…

…me-constraint

Added error message in DateTime constraint.

src/Constraint/DateTime.php

@@ -6,6 +6,11 @@
 
 class DateTime extends Constraint
 {
+    public function __construct(string $errorMessage = null)
+    {
+        $this->setErrorMessage($errorMessage ?? 'Invalid date/time format');
+    }
+
     public function validate($content): bool
     {
         if (!is_string($content)) {

tests/Constraint/DateTimeTest.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Linio\Component\Input\Constraint;
+
+use PHPUnit\Framework\TestCase;
+
+class DateTimeTest extends TestCase
+{
+    public function testIsCheckingInvalidData()
+    {
+        $constraint = new DateTime();
+        $this->assertFalse($constraint->validate('foobar@baz.com'));
+        $this->assertFalse($constraint->validate('2018-01-99'));
+        $this->assertFalse($constraint->validate(123));
+    }
+
+    public function testIsCheckingValidData()
+    {
+        $constraint = new DateTime();
+        $this->assertTrue($constraint->validate('2018-01-01'));
+        $this->assertTrue($constraint->validate('2010-12-31T00:00:00+00:00'));
+        $this->assertTrue($constraint->validate('2006-12-12 10:00:00.5'));
+    }
+
+    public function testIsGettingErrorMessage()
+    {
+        $constraint = new DateTime();
+        $this->assertFalse($constraint->validate('foo/bar'));
+        $this->assertEquals('[field] Invalid date/time format', $constraint->getErrorMessage('field'));
+    }
+
+    public function testErrorMessageIsCustomizable()
+    {
+        $constraint = new DateTime('CUSTOM!');
+        $this->assertSame('[field] CUSTOM!', $constraint->getErrorMessage('field'));
+    }
+}