java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
	at ds.tests.OrdArrayTest$ToStringTests.testDisplay(OrdArrayTest.java:622)
Caused by: java.lang.IllegalStateException: Internal problem occurred, please report it. Mockito is unable to load the default implementation of class that is a part of Mockito distribution. Failed to load interface org.mockito.plugins.MockMaker
Caused by: java.lang.reflect.InvocationTargetException
Caused by: org.mockito.exceptions.base.MockitoInitializationException: 

Could not initialize inline Byte Buddy mock maker.

It appears as if your JDK does not supply a working agent attachment mechanism.
Java               : 19
JVM vendor name    : Oracle Corporation
JVM vendor version : 19.0.2+7
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 19.0.2+7
JVM info           : mixed mode
OS name            : Linux
OS version         : 5.4.147-qgki-g65a062a09cb7

Caused by: java.lang.IllegalStateException: Could not self-attach to current VM using external process

[ERROR] Errors: 
[ERROR]   HighArrayTest$ToStringTests.testDisplay:524 » IllegalState Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
[ERROR]   OrdArrayTest$ToStringTests.testDisplay:622 » IllegalState Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)