TestCase:prepareTestData(): check that every data provider item is array [Closes #431]

Author: milo

src/Framework/TestCase.php

@@ -245,6 +245,11 @@ private function prepareTestData(\ReflectionMethod $method, array $dataprovider)
 			}
 
 			foreach ($res as $k => $set) {
+				if (!is_array($set)) {
+					$type = is_object($set) ? get_class($set) : gettype($set);
+					throw new TestCaseException("Data provider $provider() item '$k' must be an array, $type given.");
+				}
+
 				$data["$i-$k"] = is_string(key($set))
 					? array_merge($defaultParams, $set)
 					: $set;

tests/Framework/TestCase.invalidProvider.phpt

@@ -23,6 +23,18 @@ class InvalidProviderTest extends Tester\TestCase
 	public function testMissingDataProvider($a)
 	{
 	}
+
+
+	public function invalidDataProviderItem()
+	{
+		return ['non-array-item'];
+	}
+
+
+	/** @dataProvider invalidDataProviderItem */
+	public function testInvalidDataProviderItem()
+	{
+	}
 }
 
 
@@ -35,3 +47,8 @@ Assert::exception(function () {
 	$test = new InvalidProviderTest;
 	$test->runTest('testMissingDataProvider');
 }, Tester\TestCaseException::class, 'Method testMissingDataProvider() has arguments, but @dataProvider is missing.');
+
+Assert::exception(function () {
+	$test = new InvalidProviderTest;
+	$test->runTest('testInvalidDataProviderItem');
+}, Tester\TestCaseException::class, "Data provider invalidDataProviderItem() item '0' must be an array, string given.");