| /* |
| * Copyright 2020 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.compose.foundation |
| |
| import android.os.Build |
| import androidx.test.filters.MediumTest |
| import androidx.test.filters.SdkSuppress |
| import androidx.ui.core.Alignment |
| import androidx.ui.core.DensityAmbient |
| import androidx.ui.core.Modifier |
| import androidx.compose.foundation.shape.corner.CircleShape |
| import androidx.compose.ui.geometry.Offset |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.graphics.RectangleShape |
| import androidx.compose.ui.graphics.toArgb |
| import androidx.compose.foundation.layout.preferredSize |
| import androidx.compose.foundation.layout.wrapContentSize |
| import androidx.ui.test.assertHeightIsEqualTo |
| import androidx.ui.test.assertShape |
| import androidx.ui.test.assertWidthIsEqualTo |
| import androidx.ui.test.captureToBitmap |
| import androidx.ui.test.createComposeRule |
| import androidx.ui.test.onRoot |
| import androidx.ui.unit.dp |
| import org.junit.Assert |
| import org.junit.Rule |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @MediumTest |
| @SdkSuppress(minSdkVersion = Build.VERSION_CODES.O) |
| @RunWith(JUnit4::class) |
| class CanvasTest { |
| |
| val contentTag = "CanvasTest" |
| val boxWidth = 100 |
| val boxHeight = 100 |
| val containerSize = boxWidth |
| |
| @get:Rule |
| val composeTestRule = createComposeRule() |
| |
| @Test |
| fun testCanvas() { |
| val strokeWidth = 5.0f |
| composeTestRule.setContent { |
| val density = DensityAmbient.current.density |
| val containerSize = (containerSize * 2 / density).dp |
| val minWidth = (boxWidth / density).dp |
| val minHeight = (boxHeight / density).dp |
| Box(modifier = Modifier.preferredSize(containerSize) |
| .background(color = Color.White) |
| .wrapContentSize(Alignment.Center)) { |
| Canvas(modifier = Modifier.preferredSize(minWidth, minHeight)) { |
| drawLine( |
| start = Offset.Zero, |
| end = Offset(size.width, size.height), |
| color = Color.Red, |
| strokeWidth = strokeWidth |
| ) |
| } |
| } |
| } |
| |
| val paintBoxColor = Color.Red.toArgb() |
| val containerBgColor = Color.White.toArgb() |
| val strokeOffset = (strokeWidth / 2).toInt() + 3 |
| onRoot().captureToBitmap().apply { |
| val imageStartX = width / 2 - boxWidth / 2 |
| val imageStartY = height / 2 - boxHeight / 2 |
| |
| // Top left |
| Assert.assertEquals(paintBoxColor, getPixel(imageStartX, imageStartY)) |
| |
| // Top Left, to the left of the line |
| Assert.assertEquals(containerBgColor, |
| getPixel(imageStartX - strokeOffset, imageStartY)) |
| |
| // Top Left, to the right of the line |
| Assert.assertEquals(containerBgColor, |
| getPixel(imageStartX + strokeOffset, imageStartY)) |
| |
| // Bottom right |
| Assert.assertEquals(paintBoxColor, getPixel(imageStartX + boxWidth - 1, |
| imageStartY + boxHeight - 1)) |
| |
| // Bottom right to the right of the line |
| Assert.assertEquals(containerBgColor, |
| getPixel(imageStartX + boxWidth + strokeOffset, |
| imageStartY + boxHeight)) |
| |
| // Bottom right to the left of the line |
| Assert.assertEquals(containerBgColor, |
| getPixel(imageStartX + boxWidth - strokeOffset, |
| imageStartY + boxHeight)) |
| |
| // Middle |
| Assert.assertEquals(paintBoxColor, getPixel(imageStartX + boxWidth / 2, |
| imageStartY + boxHeight / 2)) |
| |
| // Middle to the left of the line |
| Assert.assertEquals(containerBgColor, |
| getPixel(imageStartX + boxWidth / 2 - strokeOffset, |
| imageStartY + boxHeight / 2)) |
| |
| // Middle to the right of the line |
| Assert.assertEquals(containerBgColor, |
| getPixel(imageStartX + boxWidth / 2 + strokeOffset, |
| imageStartY + boxHeight / 2)) |
| } |
| } |
| |
| @Test |
| fun canvas_noSize_emptyCanvas() { |
| composeTestRule.setContentForSizeAssertions { |
| Canvas(modifier = Modifier) { |
| drawRect(Color.Black) |
| } |
| } |
| .assertHeightIsEqualTo(0.dp) |
| .assertWidthIsEqualTo(0.dp) |
| } |
| |
| @Test |
| fun canvas_exactSizes() { |
| composeTestRule.setContentForSizeAssertions { |
| Canvas(Modifier.preferredSize(100.dp)) { |
| drawRect(Color.Red) |
| } |
| } |
| .assertWidthIsEqualTo(100.dp) |
| .assertHeightIsEqualTo(100.dp) |
| .captureToBitmap() |
| .assertShape( |
| density = composeTestRule.density, |
| backgroundColor = Color.Red, |
| shapeColor = Color.Red, |
| shape = RectangleShape |
| ) |
| } |
| |
| @Test |
| fun canvas_exactSizes_drawCircle() { |
| composeTestRule.setContentForSizeAssertions { |
| Canvas(Modifier.preferredSize(100.dp)) { |
| drawRect(Color.Red) |
| drawCircle( |
| Color.Blue, |
| radius = 10.0f |
| ) |
| } |
| } |
| .assertWidthIsEqualTo(100.dp) |
| .assertHeightIsEqualTo(100.dp) |
| .captureToBitmap() |
| .assertShape( |
| density = composeTestRule.density, |
| backgroundColor = Color.Red, |
| shapeColor = Color.Blue, |
| shape = CircleShape, |
| shapeSizeX = 20.0f, |
| shapeSizeY = 20.0f, |
| shapeOverlapPixelCount = 2.0f |
| ) |
| } |
| } |