| /* |
| * 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.test |
| |
| import androidx.compose.Composable |
| import androidx.ui.unit.Density |
| import androidx.ui.unit.DensityScope |
| import androidx.ui.unit.Dp |
| import androidx.ui.unit.IntPx |
| import androidx.ui.core.OnChildPositioned |
| import androidx.ui.unit.PxSize |
| import androidx.ui.unit.dp |
| import androidx.ui.unit.withDensity |
| import androidx.ui.layout.DpConstraints |
| import androidx.ui.layout.LayoutSize |
| import androidx.ui.layout.Stack |
| import androidx.ui.layout.Wrap |
| import androidx.ui.unit.round |
| import androidx.ui.unit.toPxSize |
| import kotlin.math.abs |
| |
| /** |
| * Constant to emulate very big but finite constraints |
| */ |
| val BigTestConstraints = DpConstraints(maxWidth = 5000.dp, maxHeight = 5000.dp) |
| |
| /** |
| * Set content as with [ComposeTestRule.setContent], but return sizes of this content |
| * |
| * @param parentConstraints desired parent constraints for content |
| * @param performSetContent lambda that should be performed to set content. |
| * Defaults to [ComposeTestRule.setContent] and usually don't need to be changed |
| * @param children content to set |
| */ |
| fun ComposeTestRule.setContentAndGetPixelSize( |
| parentConstraints: DpConstraints = BigTestConstraints, |
| // TODO : figure out better way to make it flexible |
| performSetContent: (@Composable() () -> Unit) -> Unit = { setContent(it) }, |
| children: @Composable() () -> Unit |
| ): PxSize { |
| var realSize: PxSize? = null |
| performSetContent { |
| Wrap { |
| Stack( |
| LayoutSize.Min(parentConstraints.minWidth, parentConstraints.minHeight) + |
| LayoutSize.Max(parentConstraints.maxWidth, parentConstraints.maxHeight) |
| ) { |
| OnChildPositioned( |
| onPositioned = { coordinates -> realSize = coordinates.size.toPxSize() }, |
| children = children |
| ) |
| } |
| } |
| } |
| return realSize!! |
| } |
| |
| /** |
| * Set content as with [ComposeTestRule.setContent], but return [CollectedSizes] to assert |
| * width and height of this content |
| * |
| * @param parentConstraints desired parent constraints for content |
| * @param children content to set |
| */ |
| fun ComposeTestRule.setContentAndCollectSizes( |
| parentConstraints: DpConstraints = BigTestConstraints, |
| children: @Composable() () -> Unit |
| ): CollectedSizes { |
| val size = setContentAndGetPixelSize(parentConstraints, { setContent(it) }, children) |
| return CollectedSizes(size, density) |
| } |
| |
| /** |
| * Small utility class to provide convenient assertion for width and height for some [PxSize]. |
| * It also provides [DensityScope] while asserting. |
| * |
| * @see ComposeTestRule.setContentAndCollectSizes |
| */ |
| class CollectedSizes(private val size: PxSize, private val density: Density) { |
| fun assertHeightEqualsTo(expectedHeight: Dp) = |
| assertHeightEqualsTo { expectedHeight.toIntPx() } |
| |
| fun assertWidthEqualsTo(expectedWidth: Dp): CollectedSizes = |
| assertWidthEqualsTo { expectedWidth.toIntPx() } |
| |
| fun assertIsSquareWithSize(expectedSize: Dp) = assertIsSquareWithSize { expectedSize.toIntPx() } |
| |
| fun assertWidthEqualsTo(expectedWidthPx: DensityScope.() -> IntPx): CollectedSizes { |
| val widthPx = withDensity(density) { |
| expectedWidthPx() |
| } |
| assertSize(size.width.round(), widthPx) |
| return this |
| } |
| |
| fun assertHeightEqualsTo(expectedHeightPx: DensityScope.() -> IntPx): CollectedSizes { |
| val heightPx = withDensity(density) { |
| expectedHeightPx() |
| } |
| assertSize(size.height.round(), heightPx) |
| return this |
| } |
| |
| fun assertIsSquareWithSize(expectedSquarePx: DensityScope.() -> IntPx): CollectedSizes { |
| val squarePx = withDensity(density) { |
| expectedSquarePx() |
| } |
| assertSize(size.width.round(), squarePx) |
| assertSize(size.height.round(), squarePx) |
| return this |
| } |
| } |
| |
| private fun assertSize(actual: IntPx, expected: IntPx) { |
| // TODO: because if dp and ipx collision. Remove dp assertion later |
| if (abs(actual.value - expected.value) > 1) { |
| throw AssertionError("Found size: $actual pixels.\nExpected size $expected pixels") |
| } |
| } |