Override hashCode in AnimatableScaleMatrix

/*

 * Copyright (C) 2024 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.wm.shell.bubbles.animation

import androidx.test.ext.junit.runners.AndroidJUnit4

import androidx.test.filters.SmallTest

import com.google.common.truth.Truth.assertThat

import org.junit.Test

import org.junit.runner.RunWith

/** Tests for [AnimatableScaleMatrix] */

@SmallTest

@RunWith(AndroidJUnit4::class)

class AnimatableScaleMatrixTest {

    @Test

    fun test_equals_matricesWithSameValuesAreNotEqual() {

        val matrix1 = AnimatableScaleMatrix().apply { setScale(0.5f, 0.5f) }

        val matrix2 = AnimatableScaleMatrix().apply { setScale(0.5f, 0.5f) }

        assertThat(matrix1).isNotEqualTo(matrix2)

    }

    @Test

    fun test_hashCode_remainsSameIfMatrixUpdates() {

        val matrix = AnimatableScaleMatrix().apply { setScale(0.5f, 0.5f) }

        val hash1 = matrix.hashCode()

        matrix.setScale(0.75f, 0.75f)

        val hash2 = matrix.hashCode()

        assertThat(hash1).isEqualTo(hash2)

    }

    @Test

    fun test_hashCode_matricesWithSameValuesHaveDiffHashCode() {

        val matrix1 = AnimatableScaleMatrix().apply { setScale(0.5f, 0.5f) }

        val matrix2 = AnimatableScaleMatrix().apply { setScale(0.5f, 0.5f) }

        assertThat(matrix1.hashCode()).isNotEqualTo(matrix2.hashCode())

    }

}

        // PhysicsAnimator's animator caching).

        return obj == this;

    }

    @Override

    public int hashCode() {

        // Make sure equals and hashCode work in a similar way. Rely on object identity for both.

        return System.identityHashCode(this);

    }

}