[Tests] Streamline

Author: OskarStark

Tests/DeprecationErrorHandler/ConfigurationTest.php

@@ -249,8 +249,8 @@ public function testToleratesForIndividualGroups(string $deprecationsHelper, arr
         }
     }
 
-    public static function provideDataForToleratesForGroup() {
-
+    public static function provideDataForToleratesForGroup(): iterable
+    {
         yield 'total threshold not reached' => ['max[total]=1', [
             'unsilenced' => 0,
             'self' => 0,

Tests/DeprecationErrorHandler/DeprecationTest.php

@@ -97,7 +97,7 @@ public function testItMutesOnlySpecificErrorMessagesWhenTheCallingCodeIsInPhpuni
         $this->assertSame($muted, $deprecation->isMuted());
     }
 
-    public static function mutedProvider()
+    public static function mutedProvider(): iterable
     {
         yield 'not from phpunit, and not a whitelisted message' => [
             false,
@@ -147,7 +147,7 @@ public function testItTakesMutesDeprecationFromPhpUnitFiles()
         $this->assertTrue($deprecation->isMuted());
     }
 
-    public static function providerGetTypeDetectsSelf()
+    public static function providerGetTypeDetectsSelf(): array
     {
         return [
             'not_from_vendors_file' => [Deprecation::TYPE_SELF, '', 'MyClass1', __FILE__],
@@ -182,7 +182,7 @@ public function testGetTypeDetectsSelf(string $expectedType, string $message, st
         $this->assertSame($expectedType, $deprecation->getType());
     }
 
-    public static function providerGetTypeUsesRightTrace()
+    public static function providerGetTypeUsesRightTrace(): array
     {
         $vendorDir = self::getVendorDir();
         $fakeTrace = [