src/test/java/au/id/zancanaro/PropertyTests.java


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package au.id.zancanaro;

import au.id.zancanaro.annotations.Property;
import au.id.zancanaro.annotations.Seed;
import org.hamcrest.CoreMatchers;
import org.junit.*;
import org.junit.experimental.theories.DataPoint;
import org.junit.matchers.JUnitMatchers;
import org.junit.runner.RunWith;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@RunWith(PropertyTestRunner.class)
public class PropertyTests {
    public static Generator<Integer> gen = Generators.integer();
    public static Generator<List<Integer>> list = Generators.listOf(Generators.integer());

    @Ignore
    @Property
    public void aIsNotOdd(int a, int b) {
        Assert.assertFalse(a % 2 == 1);
    }

    @Ignore
    @Property
    public void aIsNotLessThanB(int a, int b) {
        Assert.assertFalse(a < b);
    }

    @Ignore
    @Property
    public void aPlusBLessThanOneHundred(int a, int b) {
        Assert.assertTrue(a + b < 100);
    }

    @Property
    public void sortingIsIdempotent(List<Integer> list) {
        List<Integer> left = new ArrayList<>(list);
        Collections.sort(left);

        List<Integer> right = new ArrayList<>(list);
        Collections.sort(right);
        Collections.sort(right);

        Assert.assertEquals(left, right);
    }

    @Property
    public void reverseIsItsOwnInverse(List<Integer> list) {
        List<Integer> reversed = new ArrayList<>(list);
        Collections.reverse(reversed);
        Collections.reverse(reversed);

        Assert.assertEquals(list, reversed);
    }
}