From b4f036a63d5c0a65a644b062ab9d0e564bcc5544 Mon Sep 17 00:00:00 2001
From: Alexey Kopytko <alexey@kopytko.com>
Date: Mon, 1 Mar 2021 19:52:26 +0900
Subject: [PATCH] ProxyTrace should check for tests locations (#1494)

Fixes #1480
---
 src/TestFramework/Coverage/ProxyTrace.php               | 4 ++++
 tests/phpunit/TestFramework/Coverage/ProxyTraceTest.php | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/src/TestFramework/Coverage/ProxyTrace.php b/src/TestFramework/Coverage/ProxyTrace.php
index c1597df0b..0a60b8d63 100644
--- a/src/TestFramework/Coverage/ProxyTrace.php
+++ b/src/TestFramework/Coverage/ProxyTrace.php
@@ -108,6 +108,10 @@ public function getTests(): ?TestLocations
 
     public function getAllTestsForMutation(NodeLineRangeData $lineRange, bool $isOnFunctionSignature): iterable
     {
+        if ($this->lazyTestLocations === null) {
+            return [];
+        }
+
         return $this->getTestLocator()->getAllTestsForMutation($lineRange, $isOnFunctionSignature);
     }
 
diff --git a/tests/phpunit/TestFramework/Coverage/ProxyTraceTest.php b/tests/phpunit/TestFramework/Coverage/ProxyTraceTest.php
index ad6ca855f..234d30d0a 100644
--- a/tests/phpunit/TestFramework/Coverage/ProxyTraceTest.php
+++ b/tests/phpunit/TestFramework/Coverage/ProxyTraceTest.php
@@ -109,6 +109,15 @@ public function test_it_returns_null_for_no_tests(): void
         $this->assertNull($trace->getTests());
     }
 
+    public function test_it_returns_empty_iterable_for_no_tests(): void
+    {
+        $fileInfoMock = $this->createMock(SplFileInfo::class);
+
+        $trace = new ProxyTrace($fileInfoMock, null);
+
+        $this->assertCount(0, $trace->getAllTestsForMutation(new NodeLineRangeData(1, 2), false));
+    }
+
     public function test_it_exposes_its_test_locations(): void
     {
         $fileInfoMock = $this->createMock(SplFileInfo::class);