public void apply()
throws IllegalAccessException, InvocationTargetException, InstantiationException {
if (type.isEnum()) {
for (T instance : type.getEnumConstants()) {
assertThat(
instance.toString(),
is(
type.getCanonicalName().substring(type.getPackage().getName().length() + 1)
+ "."
+ ((Enum<?>) instance).name()));
}
return;
}
for (Constructor<?> constructor : type.getDeclaredConstructors()) {
if (constructor.isSynthetic() && skipSynthetic) {
continue;
}
constructor.setAccessible(true);
Class<?>[] parameterTypes = constructor.getParameterTypes();
Object[] actualArguments = new Object[parameterTypes.length];
Object[] otherArguments = new Object[parameterTypes.length];
int index = 0;
for (Class<?> parameterType : parameterTypes) {
putInstance(parameterType, actualArguments, otherArguments, index++);
}
int testIndex = 0;
@SuppressWarnings("unchecked")
T instance = (T) constructor.newInstance(actualArguments);
assertThat(instance, is(instance));
assertThat(instance, not(is((Object) null)));
assertThat(instance, not(is(new Object())));
Object similarInstance = constructor.newInstance(actualArguments);
assertThat(instance.hashCode(), is(similarInstance.hashCode()));
assertThat(instance, is(similarInstance));
if (skipToString) {
assertThat(instance.toString(), notNullValue());
} else if (optionalToStringRegex == null) {
checkString(instance);
} else {
assertThat(instance.toString(), new RegexMatcher(optionalToStringRegex));
}
for (Object otherArgument : otherArguments) {
Object[] compareArguments = new Object[actualArguments.length];
int argumentIndex = 0;
for (Object actualArgument : actualArguments) {
if (argumentIndex == testIndex) {
compareArguments[argumentIndex] = otherArgument;
} else {
compareArguments[argumentIndex] = actualArgument;
}
argumentIndex++;
}
Object unlikeInstance = constructor.newInstance(compareArguments);
assertThat(instance.hashCode(), not(is(unlikeInstance)));
assertThat(instance, not(is(unlikeInstance)));
testIndex++;
}
}
}
private void putInstance(
Class<?> parameterType, Object actualArguments, Object otherArguments, int index) {
Object actualArgument, otherArgument;
if (parameterType == boolean.class) {
actualArgument = DEFAULT_BOOLEAN;
otherArgument = OTHER_BOOLEAN;
} else if (parameterType == byte.class) {
actualArgument = DEFAULT_BYTE;
otherArgument = OTHER_BYTE;
} else if (parameterType == char.class) {
actualArgument = DEFAULT_CHAR;
otherArgument = OTHER_CHAR;
} else if (parameterType == short.class) {
actualArgument = DEFAULT_SHORT;
otherArgument = OTHER_SHORT;
} else if (parameterType == int.class) {
actualArgument = DEFAULT_INT;
otherArgument = OTHER_INT;
} else if (parameterType == long.class) {
actualArgument = DEFAULT_LONG;
otherArgument = OTHER_LONG;
} else if (parameterType == float.class) {
actualArgument = DEFAULT_FLOAT;
otherArgument = OTHER_FLOAT;
} else if (parameterType == double.class) {
actualArgument = DEFAULT_DOUBLE;
otherArgument = OTHER_DOUBLE;
} else if (parameterType.isEnum()) {
Object[] enumConstants = parameterType.getEnumConstants();
if (enumConstants.length == 1) {
throw new IllegalArgumentException("Enum with only one constant: " + parameterType);
}
actualArgument = enumConstants[0];
otherArgument = enumConstants[1];
} else if (parameterType.isArray()) {
actualArgument = Array.newInstance(parameterType.getComponentType(), 1);
otherArgument = Array.newInstance(parameterType.getComponentType(), 1);
putInstance(parameterType.getComponentType(), actualArgument, otherArgument, 0);
} else {
actualArgument = creator.replace(parameterType, generator, false);
refinement.apply(actualArgument);
otherArgument = creator.replace(parameterType, generator, true);
refinement.apply(otherArgument);
}
Array.set(actualArguments, index, actualArgument);
Array.set(otherArguments, index, otherArgument);
}