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Is there any tool/library which can automatically generate the tests for my hashcode and equals methods looking at the instance variables involved in these methods?
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Here is the method: public boolean equals(Object other) { boolean bool = false; if (other instanceof Patron) { Patron patron = (Patron) other; bool = this. idNumber == patron. idNumber; } else if (other instanceof Integer) { Integer id = (Integer) other; bool = this.
General contract associated with hashCode() methodIf two objects are equal(according to equals() method) then the hashCode() method should return the same integer value for both the objects.
Java hashCode() An object hash code value can change in multiple executions of the same application. If two objects are equal according to equals() method, then their hash code must be same. If two objects are unequal according to equals() method, their hash code are not required to be different.
Guava uses this test builder to test equals and hashCode.
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