Add Kotlin Pages integration tests (#899)

Followup for #885

Author: jkmassel

native/kotlin/api/kotlin/src/integrationTest/kotlin/PagesEndpointTest.kt

@@ -0,0 +1,98 @@
+package rs.wordpress.api.kotlin
+
+import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.Assertions.assertNull
+import org.junit.jupiter.api.Test
+import uniffi.wp_api.PageListParams
+import uniffi.wp_api.PageRetrieveParams
+import uniffi.wp_api.SparsePageFieldWithEditContext
+import uniffi.wp_api.WpErrorCode
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+
+class PagesEndpointTest {
+    private val testCredentials = TestCredentials.INSTANCE
+    private val client = defaultApiClient()
+
+    @Test
+    fun testPageListRequest() = runTest {
+        val postList = client.request { requestBuilder ->
+            requestBuilder.pages().listWithEditContext(params = PageListParams())
+        }.assertSuccessAndRetrieveData().data
+        assert(postList.isNotEmpty())
+    }
+
+    @Test
+    fun testRetrievePageRequest() = runTest {
+        val post = client.request { requestBuilder ->
+            requestBuilder.pages().retrieveWithEditContext(2, PageRetrieveParams())
+        }.assertSuccessAndRetrieveData().data
+        assertNotNull(post)
+    }
+
+    @Test
+    fun testFilterPageListRequest() = runTest {
+        val pageList = client.request { requestBuilder ->
+            requestBuilder.pages().filterListWithEditContext(
+                params = PageListParams(),
+                fields = listOf(
+                    SparsePageFieldWithEditContext.TITLE,
+                    SparsePageFieldWithEditContext.CONTENT
+                )
+            )
+        }.assertSuccessAndRetrieveData().data
+        assert(pageList.isNotEmpty())
+        assertNull(pageList.first().slug)
+    }
+
+    @Test
+    fun testFilterRetrievePageRequest() = runTest {
+        val sparsePage = client.request { requestBuilder ->
+            requestBuilder.pages().filterRetrieveWithEditContext(
+                pageId = 2,
+                params = PageRetrieveParams(),
+                fields = listOf(
+                    SparsePageFieldWithEditContext.TITLE,
+                    SparsePageFieldWithEditContext.CONTENT
+                )
+            )
+        }.assertSuccessAndRetrieveData().data
+        assertNotNull(sparsePage)
+        assertNull(sparsePage.slug)
+    }
+
+    @Test
+    fun testErrorPageListRequestInvalidPageNumber() = runTest {
+        val params = PageListParams(page = 99999999u)
+        val result =
+            client.request { requestBuilder -> requestBuilder.pages().listWithEditContext(params) }
+        assert(result.wpErrorCode() is WpErrorCode.PostInvalidPageNumber)
+    }
+
+    @Test
+    fun testPageListPagination() = runTest {
+        val firstPageResponse = client.request { requestBuilder ->
+            requestBuilder.pages().listWithEditContext(params = PageListParams(perPage = 1u))
+        }.assertSuccessAndRetrieveData()
+        assert(firstPageResponse.data.isNotEmpty())
+        val nextPageResponse = client.request { requestBuilder ->
+            requestBuilder.pages().listWithEditContext(firstPageResponse.nextPageParams!!)
+        }.assertSuccessAndRetrieveData()
+        assert(nextPageResponse.data.isNotEmpty())
+        val prevPageResponse = client.request { requestBuilder ->
+            requestBuilder.pages().listWithEditContext(nextPageResponse.prevPageParams!!)
+        }.assertSuccessAndRetrieveData()
+        assert(prevPageResponse.data.isNotEmpty())
+    }
+
+    @Test
+    fun ensureDateGmtIsParsedCorrectly() = runTest {
+        val page = client.request { requestBuilder ->
+            requestBuilder.pages().retrieveWithEditContext(2, PageRetrieveParams())
+        }.assertSuccessAndRetrieveData().data
+        assertEquals(
+            testCredentials.firstPostDateGmt,
+            TestCredentials.UTC_DATE_FORMAT.format(page.dateGmt)
+        )
+    }
+}