// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.provision;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

/**
 * @author bratseth
 */
public class CapacityTest {

    @Test
    public void testCapacityValidation() {
        // Equal min and max is allowed
        Capacity.from(new ClusterResources(4, 2, new NodeResources(1,2,3,4)),
                      new ClusterResources(4, 2, new NodeResources(1,2,3,4)),
                      false, true);
        assertValidationFailure(new ClusterResources(4, 2, new NodeResources(1,2,3,4)),
                                new ClusterResources(2, 2, new NodeResources(1,2,3,4)));
        assertValidationFailure(new ClusterResources(4, 4, new NodeResources(1,2,3,4)),
                                new ClusterResources(4, 2, new NodeResources(1,2,3,4)));
        assertValidationFailure(new ClusterResources(4, 2, new NodeResources(2,2,3,4)),
                                new ClusterResources(4, 2, new NodeResources(1,2,3,4)));
        assertValidationFailure(new ClusterResources(4, 2, new NodeResources(1,3,3,4)),
                                new ClusterResources(4, 2, new NodeResources(1,2,3,4)));
        assertValidationFailure(new ClusterResources(4, 2, new NodeResources(1,2,4,4)),
                                new ClusterResources(4, 2, new NodeResources(1,2,3,4)));
        assertValidationFailure(new ClusterResources(4, 2, new NodeResources(1,2,3,5)),
                                new ClusterResources(4, 2, new NodeResources(1,2,3,4)));
        // It's enough than one dimension is smaller also when the others are larger
        assertValidationFailure(new ClusterResources(4, 2, new NodeResources(1,2,3,4)),
                                new ClusterResources(8, 4, new NodeResources(2,1,6,8)));
    }

    private void assertValidationFailure(ClusterResources min, ClusterResources max) {
        try {
            Capacity.from(min, max, false, true);
            fail("Expected exception with min " + min + " and max " + max);
        }
        catch (IllegalArgumentException e) {
            assertEquals("The max capacity must be larger than the min capacity, but got min " + min + " and max " + max,
                         e.getMessage());
        }
    }

}