CODEWITHSUNDEEP
javajunit4
Vishwajit Bhadrashetty
Vishwajit Bhadrashetty

Reputation: 3

initializationError: Test class should have exactly one public zero-argument

I am getting initializatoinError.

java.lang.Exception: Test class should have exactly one public zero-argument constructor My code is (This is an example from Java Programming Interview Exposed):

import org.junit.*;

import static org.junit.Assert.*;

public class Complex {
    private final double real;
    private final double imaginary;

    public Complex(final double r, final double i) {
        this.real = r;
        this.imaginary = i;
    }
    public Complex add(final Complex other) {
        return new Complex(this.real + other.real,
                this.imaginary + other.imaginary);
    }
    // hashCode omitted for brevity
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Complex complex = (Complex) o;
        if (Double.compare(complex.imaginary, imaginary) != 0) return false;
        if (Double.compare(complex.real, real) != 0) return false;
        return true;
    }

    @Test
    public void complexNumberAddition() {
        final Complex expected = new Complex(6,2);
        final Complex a = new Complex(8,0);
        final Complex b = new Complex(-2,2);
        assertEquals(a.add(b), expected);
    }
}

Any help would be appreciated.

Upvotes: 0

Views: 3855

Answers (1)

bambula
bambula

Reputation: 415

The error says exactly what is wrong. Your class doesn't have "exactly one public zero-argument constructor".

But the gold rule is to have tests outside of business classes. So create new class called public class ComplexTest and put your test method there.

Upvotes: 1

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