First Unit Tests for Utilities.java

/*

 * 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.launcher3

import android.content.Context

import android.view.View

import android.view.ViewGroup

import androidx.test.core.app.ApplicationProvider.getApplicationContext

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

import com.android.launcher3.util.ActivityContextWrapper

import org.junit.Assert.*

import org.junit.Before

import org.junit.Test

import org.junit.runner.RunWith

@RunWith(AndroidJUnit4::class)

class UtilitiesTest {

    private lateinit var mContext: Context

    @Before

    fun setUp() {

        mContext = ActivityContextWrapper(getApplicationContext())

    }

    @Test

    fun testIsPropertyEnabled() {

        // This assumes the property "propertyName" is not enabled by default

        assertFalse(Utilities.isPropertyEnabled("propertyName"))

    }

    @Test

    fun testGetDescendantCoordRelativeToAncestor() {

        val ancestor =

            object : ViewGroup(mContext) {

                override fun onLayout(changed: Boolean, l: Int, t: Int, r: Int, b: Int) {}

            }

        val descendant = View(mContext)

        descendant.x = 50f

        descendant.y = 30f

        descendant.scaleX = 2f

        descendant.scaleY = 2f

        ancestor.addView(descendant)

        val coord = floatArrayOf(10f, 15f)

        val scale =

            Utilities.getDescendantCoordRelativeToAncestor(descendant, ancestor, coord, false)

        assertEquals(2f, scale) // Expecting scale to be 2f

        assertEquals(70f, coord[0])

        assertEquals(60f, coord[1])

    }

    @Test

    fun testRoundArray() {

        val floatArray = floatArrayOf(1.2f, 3.7f, 5.5f)

        val intArray = IntArray(3)

        Utilities.roundArray(floatArray, intArray)

        assertArrayEquals(intArrayOf(1, 4, 6), intArray)

    }

    @Test

    fun testOffsetPoints() {

        val points = floatArrayOf(1f, 2f, 3f, 4f)

        Utilities.offsetPoints(points, 5f, 6f)

        val expected = listOf(6f, 8f, 8f, 10f)

        assertEquals(expected, points.toList())

    }

    @Test

    fun testPointInView() {

        val view = View(mContext)

        view.layout(0, 0, 100, 100)

        assertTrue(Utilities.pointInView(view, 50f, 50f, 0f)) // Inside view

        assertFalse(Utilities.pointInView(view, -10f, -10f, 0f)) // Outside view

        assertTrue(Utilities.pointInView(view, -5f, -5f, 10f)) // Inside slop

        assertFalse(Utilities.pointInView(view, 115f, 115f, 10f)) // Outside slop

    }

}