Add return typehints to toString methods for compatibility with PHPUnit 7 (#93)

Author: emodric

PhpUnit/ContainerBuilderHasAliasConstraint.php

@@ -27,7 +27,7 @@ public function __construct($aliasId, $expectedServiceId = null)
         $this->expectedServiceId = $expectedServiceId;
     }
 
-    public function toString()
+    public function toString(): string
     {
         return 'has an alias "' . $this->aliasId . '" for service "' . $this->expectedServiceId . '"';
     }

PhpUnit/ContainerBuilderHasServiceDefinitionConstraint.php

@@ -29,7 +29,7 @@ public function __construct($serviceId, $expectedClass = null, $checkExpectedCla
         $this->checkExpectedClass = $checkExpectedClass;
     }
 
-    public function toString()
+    public function toString(): string
     {
         return sprintf(
             'has a service definition "%s" with class "%s"',

PhpUnit/ContainerBuilderHasSyntheticServiceConstraint.php

@@ -20,7 +20,7 @@ public function __construct($serviceId)
         $this->serviceId = $serviceId;
     }
 
-    public function toString()
+    public function toString(): string
     {
         return sprintf(
             'has a synthetic service "%s"',

PhpUnit/ContainerHasParameterConstraint.php

@@ -21,7 +21,7 @@ public function __construct($parameterName, $expectedParameterValue = null, $che
         $this->checkParameterValue = $checkParameterValue;
     }
 
-    public function toString()
+    public function toString(): string
     {
         return sprintf(
             'has a parameter "%s" with the given value',

PhpUnit/DefinitionHasArgumentConstraint.php

@@ -42,7 +42,7 @@ public function __construct($argumentIndex, $expectedValue, $checkExpectedValue
         $this->checkExpectedValue = $checkExpectedValue;
     }
 
-    public function toString()
+    public function toString(): string
     {
         if (is_string($this->argumentIndex)) {
             return sprintf(

PhpUnit/DefinitionHasMethodCallConstraint.php

@@ -66,7 +66,7 @@ public function evaluate($other, $description = '', $returnResult = false)
         return false;
     }
 
-    public function toString()
+    public function toString(): string
     {
         if (null !== $this->index) {
             return sprintf(

PhpUnit/DefinitionHasTagConstraint.php

@@ -62,7 +62,7 @@ public function evaluate($other, $description = '', $returnResult = false)
         return false;
     }
 
-    public function toString()
+    public function toString(): string
     {
         return sprintf(
             'has the "%s" tag with the given attributes',

PhpUnit/DefinitionIsChildOfConstraint.php

@@ -37,7 +37,7 @@ public function evaluate($other, $description = '', $returnResult = false)
         return true;
     }
 
-    public function toString()
+    public function toString(): string
     {
         return sprintf(
             'is a child of service "%s"',