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/*
* 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.layout.test
import androidx.ui.layout.DpConstraints
import androidx.ui.layout.enforce
import androidx.ui.layout.hasBoundedHeight
import androidx.ui.layout.hasBoundedWidth
import androidx.ui.layout.hasFixedHeight
import androidx.ui.layout.hasFixedWidth
import androidx.ui.layout.isZero
import androidx.ui.layout.offset
import androidx.ui.unit.Dp
import androidx.ui.unit.dp
import org.junit.Assert.assertFalse
import org.junit.Assert.assertTrue
import org.junit.Assert.fail
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
@RunWith(JUnit4::class)
class DpConstraintsTest {
@Test
fun constructor() {
val defaultDpConstraints = DpConstraints()
defaultDpConstraints.assertEquals(0.dp, Dp.Infinity, 0.dp, Dp.Infinity)
val constraints = DpConstraints(0.dp, 1.dp, 2.dp, 3.dp)
constraints.assertEquals(0.dp, 1.dp, 2.dp, 3.dp)
val tightDpConstraintsForWidth = DpConstraints.fixedWidth(5.dp)
tightDpConstraintsForWidth.assertEquals(5.dp, 5.dp, 0.dp, Dp.Infinity)
val tightDpConstraintsForHeight = DpConstraints.fixedHeight(5.dp)
tightDpConstraintsForHeight.assertEquals(0.dp, Dp.Infinity, 5.dp, 5.dp)
val tightDpConstraints = DpConstraints.fixed(5.dp, 7.dp)
tightDpConstraints.assertEquals(5.dp, 5.dp, 7.dp, 7.dp)
}
@Test
fun hasBoundedDimensions() {
val unbounded = DpConstraints(3.dp, Dp.Infinity, 3.dp, Dp.Infinity)
assertFalse(unbounded.hasBoundedWidth)
assertFalse(unbounded.hasBoundedHeight)
val bounded = DpConstraints(3.dp, 5.dp, 3.dp, 5.dp)
assertTrue(bounded.hasBoundedWidth)
assertTrue(bounded.hasBoundedHeight)
}
@Test
fun hasFixedDimensions() {
val untight = DpConstraints(3.dp, 4.dp, 8.dp, 9.dp)
assertFalse(untight.hasFixedWidth)
assertFalse(untight.hasFixedHeight)
val tight = DpConstraints(3.dp, 3.dp, 5.dp, 5.dp)
assertTrue(tight.hasFixedWidth)
assertTrue(tight.hasFixedHeight)
}
@Test
fun isZero() {
val nonZero = DpConstraints(1.dp, 2.dp, 1.dp, 2.dp)
assertFalse(nonZero.isZero)
val zero = DpConstraints(0.dp, 0.dp, 0.dp, 0.dp)
assertTrue(zero.isZero)
}
@Test
fun enforce() {
val constraints = DpConstraints(5.dp, 10.dp, 5.dp, 10.dp)
constraints.enforce(DpConstraints(4.dp, 11.dp, 4.dp, 11.dp)).assertEquals(
5.dp, 10.dp, 5.dp, 10.dp
)
constraints.enforce(DpConstraints(7.dp, 9.dp, 7.dp, 9.dp)).assertEquals(
7.dp, 9.dp, 7.dp, 9.dp
)
constraints.enforce(DpConstraints(2.dp, 3.dp, 2.dp, 3.dp)).assertEquals(
3.dp, 3.dp, 3.dp, 3.dp
)
constraints.enforce(DpConstraints(10.dp, 11.dp, 10.dp, 11.dp)).assertEquals(
10.dp, 10.dp, 10.dp, 10.dp
)
}
@Test
fun offset() {
val constraints = DpConstraints(2.dp, 2.dp, 5.dp, 5.dp)
constraints.offset(horizontal = 2.dp, vertical = 3.dp).assertEquals(
4.dp, 4.dp, 8.dp, 8.dp
)
constraints.offset(horizontal = -7.dp, vertical = -7.dp).assertEquals(
0.dp, 0.dp, 0.dp, 0.dp
)
}
@Test
fun validity() {
assertInvalid(minWidth = Dp.Infinity)
assertInvalid(minHeight = Dp.Infinity)
assertInvalid(minWidth = Float.NaN.dp)
assertInvalid(maxWidth = Float.NaN.dp)
assertInvalid(minHeight = Float.NaN.dp)
assertInvalid(maxHeight = Float.NaN.dp)
assertInvalid(minWidth = 3.dp, maxWidth = 2.dp)
assertInvalid(minHeight = 3.dp, maxHeight = 2.dp)
assertInvalid(minWidth = -1.dp)
assertInvalid(maxWidth = -1.dp)
assertInvalid(minHeight = -1.dp)
assertInvalid(maxHeight = -1.dp)
}
private fun DpConstraints.assertEquals(
minWidth: Dp,
maxWidth: Dp,
minHeight: Dp,
maxHeight: Dp
) {
assertTrue(this.minWidth == minWidth && this.maxWidth == maxWidth &&
this.minHeight == minHeight && this.maxHeight == maxHeight)
}
private fun assertInvalid(
minWidth: Dp = 0.dp,
maxWidth: Dp = 0.dp,
minHeight: Dp = 0.dp,
maxHeight: Dp = 0.dp
) {
val constraints: DpConstraints
try {
constraints = DpConstraints(minWidth, maxWidth, minHeight, maxHeight)
} catch (_: IllegalArgumentException) {
return
}
fail("Invalid constraints $constraints are considered valid")
}
}