Change-Id: Id1b0566f4c1705372699c69741dc1016ca6e169djdk/fake_window_metrics
Jonathan Koren
5 months ago
parent
9e4532f0eb
commit
f49dda4ddc
@ -0,0 +1,82 @@
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/*
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* Copyright 2024 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.ui
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import android.app.Activity
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import android.content.Context
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import android.graphics.Rect
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import androidx.compose.ui.geometry.Size
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import androidx.compose.ui.unit.toIntSize
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import androidx.window.layout.WindowMetrics
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import androidx.window.layout.WindowMetricsCalculator
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import androidx.window.layout.WindowMetricsCalculatorDecorator
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import org.junit.rules.TestRule
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import org.junit.runner.Description
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import org.junit.runners.model.Statement
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/**
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* A test rule which allows overriding the reported WindowMetrics with an arbitrary size, defaulting
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* to [Size.Zero]. The size is not persisted and will be reset after each test.
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*/
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class FakeWindowMetricsCalculatorRule : TestRule {
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private val calculator = FakeWindowMetricsCalculator()
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fun setWindowSize(size: Size) {
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calculator.windowSize = size
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}
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override fun apply(base: Statement?, description: Description?): Statement {
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return object : Statement() {
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override fun evaluate() {
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WindowMetricsCalculator.overrideDecorator(
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object : WindowMetricsCalculatorDecorator {
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override fun decorate(calculator: WindowMetricsCalculator): WindowMetricsCalculator =
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calculator
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},
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)
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try {
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base?.evaluate()
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} finally {
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WindowMetricsCalculator.reset()
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calculator.resetWindowSize()
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}
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}
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}
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}
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}
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internal class FakeWindowMetricsCalculator : WindowMetricsCalculator {
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var windowSize = Size.Zero
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fun resetWindowSize() {
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windowSize = Size.Zero
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}
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override fun computeCurrentWindowMetrics(context: Context) = compute()
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override fun computeMaximumWindowMetrics(context: Context) = compute()
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override fun computeCurrentWindowMetrics(activity: Activity) = compute()
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override fun computeMaximumWindowMetrics(activity: Activity) = compute()
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private fun compute(): WindowMetrics = windowSize.toIntSize().run {
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WindowMetrics(Rect(0, 0, width, height))
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}
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}
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