add tests for paged loading components

pagination/compose/src/jvmTest/kotlin/InfinityPagedComponentTests.kt

@@ -0,0 +1,47 @@
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.ui.test.ExperimentalTestApi
+import androidx.compose.ui.test.runComposeUiTest
+import dev.inmo.micro_utils.pagination.*
+import dev.inmo.micro_utils.pagination.compose.InfinityPagedComponent
+import dev.inmo.micro_utils.pagination.compose.PagedComponent
+import org.jetbrains.annotations.TestOnly
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class InfinityPagedComponentTests {
+    @OptIn(ExperimentalTestApi::class)
+    @Test
+    @TestOnly
+    fun testSimpleLoad() = runComposeUiTest {
+        var expectedList = listOf<Int>()
+        setContent {
+            InfinityPagedComponent<Int>(
+                size = 1,
+                loader = {
+                    PaginationResult(
+                        page = it.page,
+                        size = it.size,
+                        results = (it.firstIndex .. it.lastIndex).toList(),
+                        objectsNumber = 3
+                    ).also {
+                        expectedList += it.results
+                    }
+                }
+            ) {
+                assertEquals(expectedList, it)
+
+                LaunchedEffect(it ?.size) {
+                    loadNext()
+                }
+            }
+        }
+
+        waitForIdle()
+
+        assertContentEquals(
+            listOf(0, 1, 2),
+            expectedList
+        )
+    }
+}

pagination/compose/src/jvmTest/kotlin/PagedComponentTests.kt

@@ -0,0 +1,64 @@
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.ui.test.ExperimentalTestApi
+import androidx.compose.ui.test.runComposeUiTest
+import dev.inmo.micro_utils.pagination.*
+import dev.inmo.micro_utils.pagination.compose.PagedComponent
+import org.jetbrains.annotations.TestOnly
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class PagedComponentTests {
+    @OptIn(ExperimentalTestApi::class)
+    @Test
+    @TestOnly
+    fun testSimpleLoad() = runComposeUiTest {
+        var expectedPage = PaginationResult(
+            page = 0,
+            size = 1,
+            results = listOf(0),
+            objectsNumber = 3
+        )
+        var previousPage = expectedPage
+        setContent {
+            PagedComponent<Int>(
+                initialPage = 0,
+                size = 1,
+                loader = {
+                    previousPage = expectedPage
+                    expectedPage = PaginationResult(
+                        page = it.page,
+                        size = it.size,
+                        results = (it.firstIndex .. it.lastIndex).toList(),
+                        objectsNumber = 3
+                    )
+                    expectedPage
+                }
+            ) {
+                assertEquals(expectedPage, it)
+                assertEquals(expectedPage.results, it.results)
+
+                if (it.isLastPage || it.page < previousPage.page) {
+                    if (it.isFirstPage) {
+                        // do nothing - end of test
+                    } else {
+                        loadPrevious()
+                    }
+                } else {
+                    loadNext()
+                }
+            }
+        }
+
+        waitForIdle()
+
+        assertEquals(
+            PaginationResult(
+                page = 0,
+                size = 1,
+                results = listOf(0),
+                objectsNumber = 3
+            ),
+            expectedPage
+        )
+    }
+}