Fix #1300 - add functions mentioned in class file where class is used

src/Psalm/Internal/Codebase/Populator.php

@@ -764,6 +764,29 @@ class Populator
             );
         }
 
+        foreach ($storage->referenced_classlikes as $fq_class_name) {
+            try {
+                $classlike_storage = $this->classlike_storage_provider->get($fq_class_name);
+            } catch (\InvalidArgumentException $e) {
+                continue;
+            }
+
+            if (!$classlike_storage->location) {
+                continue;
+            }
+
+            try {
+                $included_file_storage = $this->file_storage_provider->get($classlike_storage->location->file_path);
+            } catch (\InvalidArgumentException $e) {
+                continue;
+            }
+
+            $storage->declaring_function_ids = array_merge(
+                $included_file_storage->declaring_function_ids,
+                $storage->declaring_function_ids
+            );
+        }
+
         $storage->required_file_paths = $all_required_file_paths;
 
         foreach ($all_required_file_paths as $required_file_path) {

tests/DummyProject/Bar.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Foo;
+namespace Vimeo\Test\DummyProject;
 
 class Bar
 {
@@ -12,3 +12,8 @@ class Bar
         $this->x = "hello";
     }
 }
+
+function someFunction() : void
+{
+    echo "here";
+}

tests/DummyProject/Bat.php

@@ -1,11 +1,13 @@
 <?php
 
-namespace Foo;
+namespace Vimeo\Test\DummyProject;
 
 class Bat
 {
     public function __construct()
     {
         $a = new Bar();
+
+        someFunction();
     }
 }

tests/ProjectCheckerTest.php

@@ -192,7 +192,7 @@ class ProjectAnalyzerTest extends TestCase
 
         $bat_replacement_contents = '<?php
 
-namespace Foo;
+namespace Vimeo\Test\DummyProject;
 
 class Bat
 {