Simplify Stream check in FieldArgumentsProvider

Author: sbrannen

junit-jupiter-params/src/main/java/org/junit/jupiter/params/provider/FieldArgumentsProvider.java

@@ -19,9 +19,7 @@
 import java.util.Iterator;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
-import java.util.stream.DoubleStream;
-import java.util.stream.IntStream;
-import java.util.stream.LongStream;
+import java.util.stream.BaseStream;
 import java.util.stream.Stream;
 
 import org.junit.jupiter.api.extension.ExtensionContext;
@@ -107,15 +105,8 @@ private static Object readField(Field field, Object testInstance) {
 		Preconditions.notNull(value,
 			() -> format("The value of field [%s] in class [%s] must not be null", fieldName, declaringClass));
 
-		boolean isStream = value instanceof Stream//
-				|| value instanceof DoubleStream//
-				|| value instanceof IntStream//
-				|| value instanceof LongStream;
-
-		Preconditions.condition(!isStream,
-			() -> format(
-				"The value of field [%s] in class [%s] must not be a Stream, IntStream, LongStream, or DoubleStream",
-				fieldName, declaringClass));
+		Preconditions.condition(!(value instanceof BaseStream),
+			() -> format("The value of field [%s] in class [%s] must not be a stream", fieldName, declaringClass));
 
 		Preconditions.condition(!(value instanceof Iterator),
 			() -> format("The value of field [%s] in class [%s] must not be an Iterator", fieldName, declaringClass));

junit-jupiter-params/src/test/java/org/junit/jupiter/params/provider/FieldArgumentsProviderTests.java

@@ -434,8 +434,7 @@ void throwsExceptionWhenLocalFieldHasStreamReturnType(String field) {
 
 			var exception = assertThrows(PreconditionViolationException.class, () -> provideArguments(field).toArray());
 
-			assertThat(exception.getMessage()).isEqualTo(
-				"The value of field [%s] in class [%s] must not be a Stream, IntStream, LongStream, or DoubleStream",
+			assertThat(exception.getMessage()).isEqualTo("The value of field [%s] in class [%s] must not be a stream",
 				field, factoryClass);
 		}