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/**
* EdDSA-Java by str4d
*
* To the extent possible under law, the person who associated CC0 with
* EdDSA-Java has waived all copyright and related or neighboring rights
* to EdDSA-Java.
*
* You should have received a copy of the CC0 legalcode along with this
* work. If not, see <https://creativecommons.org/publicdomain/zero/1.0/>.
*
*/
package net.i2p.crypto.eddsa.math.ed25519;
import net.i2p.crypto.eddsa.math.*;
import org.hamcrest.core.*;
import org.junit.*;
import java.math.BigInteger;
/**
* Tests rely on the BigInteger class.
*/
public class Ed25519FieldElementTest extends AbstractFieldElementTest {
protected FieldElement getRandomFieldElement() {
return MathUtils.getRandomFieldElement();
}
protected BigInteger toBigInteger(FieldElement f) {
return MathUtils.toBigInteger(f);
}
protected BigInteger getQ() {
return MathUtils.getQ();
}
protected Field getField() {
return MathUtils.getField();
}
// region constructor
@Test
public void canConstructFieldElementFromArrayWithCorrectLength() {
// Assert:
new Ed25519FieldElement(MathUtils.getField(), new int[10]);
}
@Test (expected = IllegalArgumentException.class)
public void cannotConstructFieldElementFromArrayWithIncorrectLength() {
// Assert:
new Ed25519FieldElement(MathUtils.getField(), new int[9]);
}
@Test (expected = IllegalArgumentException.class)
public void cannotConstructFieldElementWithoutField() {
// Assert:
new Ed25519FieldElement(null, new int[9]);
}
// endregion
// region isNonZero
protected FieldElement getZeroFieldElement() {
return new Ed25519FieldElement(MathUtils.getField(), new int[10]);
}
protected FieldElement getNonZeroFieldElement() {
final int[] t = new int[10];
t[0] = 5;
return new Ed25519FieldElement(MathUtils.getField(), t);
}
// endregion
// region toString
@Test
public void toStringReturnsCorrectRepresentation() {
// Arrange:
final byte[] bytes = new byte[32];
for (int i=0; i<32; i++) {
bytes[i] = (byte)(i+1);
}
final FieldElement f = MathUtils.getField().getEncoding().decode(bytes);
// Act:
final String fAsString = f.toString();
final StringBuilder builder = new StringBuilder();
builder.append("[Ed25519FieldElement val=");
for (byte b : bytes) {
builder.append(String.format("%02x", b));
}
builder.append("]");
// Assert:
Assert.assertThat(fAsString, IsEqual.equalTo(builder.toString()));
}
// endregion
}
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