- Rename assure => assertion

 - Deprecate assure. assure will be removed in v2

src/functions.php

@@ -31,9 +31,21 @@ function enforce(bool $condition, string $message = null): Enforcement
  *
  * @throws \AssertionError
  */
-function assure(bool $condition, string $message = null)
+function assertion(bool $condition, string $message = null)
 {
     if (!$condition) {
         throw new \AssertionError($message ?? 'Assertion failed');
     }
+}
+
+/**
+ * @param bool        $condition
+ * @param string|null $message
+ *
+ * @throws \AssertionError
+ * @deprecated Use assertion instead. `assure` is just an alias for `assertion`, since `assertion` is a more meaningful name.
+ */
+function assure(bool $condition, string $message = null)
+{
+    assertion($condition, $message);
 }

tests/AssuranceTest.php → tests/AssertionTest.php

@@ -1,29 +1,37 @@
 <?php
 
 use PHPUnit\Framework\TestCase;
+use function Dgame\Ensurance\assertion;
 use function Dgame\Ensurance\assure;
 
 /**
- * Class Assurance
+ * Class AssertionTest
  */
-final class AssuranceTest extends TestCase
+final class AssertionTest extends TestCase
 {
     public function testNegativeAssuranceWithoutMessage()
     {
         $this->expectException(AssertionError::class);
         $this->expectExceptionMessage('Assertion failed');
-        assure(0);
+        assertion(0);
     }
 
     public function testNegativeAssuranceWithMessage()
     {
         $this->expectException(AssertionError::class);
         $this->expectExceptionMessage('That went wrong');
-        assure(0, 'That went wrong');
+        assertion(0, 'That went wrong');
     }
 
     public function testPositiveAssurance()
     {
-        assure(true);
+        assertion(true);
+    }
+
+    public function testDeprecatedAssurance()
+    {
+        $this->expectException(AssertionError::class);
+        $this->expectExceptionMessage('Assertion failed');
+        assure(0);
     }
 }