net.jqwik.engine.execution.reporting.ParameterChangesDetector Maven / Gradle / Ivy
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package net.jqwik.engine.execution.reporting;
import java.lang.reflect.*;
import java.util.*;
import net.jqwik.api.*;
import org.jspecify.annotations.*;
class ParameterChangesDetector {
static boolean haveParametersChanged(List before, List after) {
return atLeastOneParameterHasChanged(before, after);
}
private static boolean atLeastOneParameterHasChanged(List before, List after) {
if (before.size() != after.size()) {
return true;
}
for (int i = 0; i < before.size(); i++) {
Object beforeValue = before.get(i);
Object afterValue = after.get(i);
if (valuesDiffer(beforeValue, afterValue)) {
return true;
}
}
return false;
}
private static boolean valuesDiffer(@Nullable Object before, @Nullable Object after) {
if ((before == null) != (after == null)) {
return true;
}
if (before == null) {
return false;
}
if (before.getClass() != after.getClass()) {
return true;
}
if (before instanceof Tuple) {
return tupleValuesDiffer((Tuple) before, (Tuple) after);
}
if (hasOwnEqualsImplementation(before.getClass())) {
return !Objects.equals(before, after);
} else {
return false;
}
}
private static boolean tupleValuesDiffer(Tuple before, Tuple after) {
return atLeastOneParameterHasChanged(before.items(), after.items());
}
private static boolean hasOwnEqualsImplementation(Class aClass) {
// TODO: There are probably other pathological cases of classes with equals implementation
if (Proxy.isProxyClass(aClass)) {
return false;
}
return !equalsMethod(aClass).equals(equalsMethod(Object.class));
}
private static Method equalsMethod(Class aClass) {
try {
return aClass.getMethod("equals", Object.class);
} catch (NoSuchMethodException e) {
throw new JqwikException("All classes should have an equals() method");
}
}
}