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Test itemsAfter is set when item count is high #1480

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merged 1 commit into from
Sep 13, 2023
Merged

Test itemsAfter is set when item count is high #1480

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19 changes: 15 additions & 4 deletions ...ylayout-compose/src/commonTest/kotlin/app/cash/redwood/lazylayout/compose/LazyListTest.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -61,14 +61,25 @@ class LazyListTest {
}

@Test
fun populatedLazyColumn() = runTest {
fun populatedLazyColumnVariesItemsAfter_0() =
populatedLazyColumnVariesItemsAfter(10, 0, 10)

@Test
fun populatedLazyColumnVariesItemsAfter_1() =
populatedLazyColumnVariesItemsAfter(100, 85, 15)

private fun populatedLazyColumnVariesItemsAfter(
itemCount: Int,
expectedItemsAfter: Int,
expectedItemCount: Int,
) = runTest {
val snapshot = TestSchemaTester {
setContent {
LazyColumn(
state = rememberLazyListState(),
placeholder = { Text("Placeholder") },
) {
items(10) {
items(itemCount) {
Text(it.toString())
}
}
Expand All @@ -83,14 +94,14 @@ class LazyListTest {
isVertical = true,
onViewportChanged = { _, _ -> },
itemsBefore = 0,
itemsAfter = 0,
itemsAfter = expectedItemsAfter,
width = Constraint.Wrap,
height = Constraint.Wrap,
margin = Margin(0.0.dp),
crossAxisAlignment = CrossAxisAlignment.Start,
scrollItemIndex = ScrollItemIndex(0, 0),
placeholder = List(20) { TextValue(Modifier, "Placeholder") },
items = List(10) { TextValue(Modifier, it.toString()) },
items = List(expectedItemCount) { TextValue(Modifier, it.toString()) },
),
)
}
Expand Down