--- /dev/null	2019-04-18 12:07:41.000000000 -0700
+++ new/test/jdk/jdk/internal/math/ToDecimal/java.base/jdk/internal/math/BasicChecker.java	2019-04-18 12:07:40.000000000 -0700
@@ -0,0 +1,18 @@
+package jdk.internal.math;
+
+class BasicChecker {
+
+    static final boolean FAILURE_THROWS_EXCEPTION = true;
+
+    static void assertTrue(boolean ok, String valueName) {
+        if (ok) {
+            return;
+        }
+        String msg = valueName + " is not correct";
+        if (FAILURE_THROWS_EXCEPTION) {
+            throw new RuntimeException(msg);
+        }
+        System.err.println(msg);
+    }
+
+}