Enable psalm check for tests folder

Author: sandrokeil

psalm.xml

@@ -1,20 +1,31 @@
 <?xml version="1.0"?>
 <psalm
-    errorLevel="4"
-    resolveFromConfigFile="true"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xmlns="https://getpsalm.org/schema/config"
-    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
-    errorBaseline="psalm-baseline.xml"
+        errorLevel="4"
+        resolveFromConfigFile="true"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xmlns="https://getpsalm.org/schema/config"
+        xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+        errorBaseline="psalm-baseline.xml"
 >
-    <projectFiles>
-        <directory name="src" />
-        <ignoreFiles>
-            <directory name="vendor" />
-        </ignoreFiles>
-    </projectFiles>
+  <projectFiles>
+    <directory name="src"/>
+    <directory name="tests"/>
+    <ignoreFiles>
+      <directory name="vendor"/>
+    </ignoreFiles>
+  </projectFiles>
 
-    <plugins>
-        <pluginClass class="Psalm\PhpUnitPlugin\Plugin"/>
-    </plugins>
+  <plugins>
+    <pluginClass class="Psalm\PhpUnitPlugin\Plugin"/>
+  </plugins>
+
+  <issueHandlers>
+    <MissingPropertyType errorLevel="suppress"/>
+
+    <InternalMethod>
+      <errorLevel type="suppress">
+        <directory name="tests/ValueObject"/>
+      </errorLevel>
+    </InternalMethod>
+  </issueHandlers>
 </psalm>