add a test for concat strings

Author: co0lc0der

composer.json

@@ -4,7 +4,11 @@
     "type": "library",
     "require": {
         "php": ">=7.4",
-        "ext-pdo": "*"
+        "ext-pdo": "*",
+        "ext-fileinfo": "*",
+        "ext-intl": "*",
+        "ext-json": "*",
+        "ext-mbstring": "*"
     },
     "license": "MIT",
     "autoload": {
@@ -21,5 +25,8 @@
     "minimum-stability": "stable",
     "require-dev": {
         "phpunit/phpunit": "^9.5"
+    },
+    "scripts": {
+        "test": "phpunit"
     }
 }

tests/SqlSelectTest.php

@@ -374,6 +374,15 @@ public function testSelectSubStr()
         $this->assertSame([], $result->getParams());
     }
 
+    public function testSelectConcatStr()
+    {
+        $result = $this->qb->select("'Hello' || ' world!' as 'str'");
+
+        $this->assertSame(false, $result->hasError());
+        $this->assertSame("SELECT 'Hello' || ' world!' as 'str'", $result->getSql());
+        $this->assertSame([], $result->getParams());
+    }
+
     public function testSelectSqliteVersion()
     {
         $result = $this->qb->select("sqlite_version() as ver");