| /* |
| * Copyright 2019 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 androidx.ui.material.ripple |
| |
| import androidx.ui.unit.Density |
| import androidx.ui.unit.PxSize |
| import androidx.ui.unit.dp |
| import androidx.ui.unit.px |
| import com.google.common.truth.Truth.assertThat |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| import kotlin.math.sqrt |
| |
| @RunWith(JUnit4::class) |
| class DefaultRippleEffectTest { |
| |
| @Test |
| fun testStartRadius() { |
| val size = PxSize(10.px, 30.px) |
| val expectedRadius = 9.px // 30% of 30 |
| |
| // Top-level functions are not resolved properly in IR modules |
| val result = getRippleStartRadius(size) |
| assertThat(result).isEqualTo(expectedRadius) |
| } |
| |
| @Test |
| fun testTargetRadius() { |
| val width = 100f |
| val height = 160f |
| val size = PxSize(width.px, height.px) |
| val density = Density(2f) |
| val expectedRadius = with(density) { |
| // 10 is an extra offset from spec |
| halfDistance(width, height) + 10.dp.toPx().value |
| } |
| val result = with(density) { getRippleTargetRadius(size) } |
| assertThat(result).isEqualTo(expectedRadius.px) |
| } |
| |
| private fun halfDistance(width: Float, height: Float) = |
| sqrt(width * width + height * height) / 2 |
| } |