1 /*
2  * Copyright 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.compose.ui.unit
18 
19 import android.app.Activity
20 import android.util.TypedValue
21 import androidx.test.ext.junit.runners.AndroidJUnit4
22 import androidx.test.filters.SmallTest
23 import org.junit.Assert.assertEquals
24 import org.junit.Before
25 import org.junit.Rule
26 import org.junit.Test
27 import org.junit.runner.RunWith
28 
29 @SmallTest
30 @RunWith(AndroidJUnit4::class)
31 class DpDeviceTest {
32     @Suppress("DEPRECATION")
33     @get:Rule
34     val activityTestRule =
35         androidx.test.rule.ActivityTestRule<TestActivity>(TestActivity::class.java)
36 
37     private lateinit var activity: Activity
38 
39     @Before
setupnull40     fun setup() {
41         activity = activityTestRule.activity
42     }
43 
44     @Test
dimensionCalculationnull45     fun dimensionCalculation() {
46         val dm = activity.resources.displayMetrics
47         val dp10InPx = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 10f, dm)
48         with(Density(activity)) { assertEquals(dp10InPx, 10.dp.toPx(), 0.01f) }
49     }
50 
51     companion object {
52         class TestActivity : Activity()
53     }
54 }
55