From 7a5fd177c8d4f7578ff45755f83c21981a41a0c5 Mon Sep 17 00:00:00 2001
From: Mikhail Astafyev <astafyev.mikhail@gmail.com>
Date: Mon, 4 Nov 2019 15:00:42 +0500
Subject: [PATCH] PSC-2 added test implementation for ContentAPI
---
.../core/content/api/WriteContentAPI.kt | 6 +-
.../postssystem/core/utils/DateTimeUtils.kt | 9 +++
.../core/utils/pagination/Pagination.kt | 9 +++
.../core/api/InMemoryContentAPI.kt | 67 +++++++++++++++++++
4 files changed, 89 insertions(+), 2 deletions(-)
create mode 100644 core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/DateTimeUtils.kt
create mode 100644 core/src/test/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryContentAPI.kt
diff --git a/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt b/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt
index 3fbad021..acda8975 100644
--- a/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt
+++ b/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt
@@ -1,12 +1,14 @@
package com.insanusmokrassar.postssystem.core.content.api
-import com.insanusmokrassar.postssystem.core.content.*
+import com.insanusmokrassar.postssystem.core.content.Content
+import com.insanusmokrassar.postssystem.core.content.ContentId
+import com.insanusmokrassar.postssystem.core.content.RegisteredContent
import kotlinx.coroutines.flow.Flow
interface WriteContentAPI {
val contentCreatedFlow: Flow<RegisteredContent>
val contentDeletedFlow: Flow<RegisteredContent>
- suspend fun createContent(post: Content): RegisteredContent?
+ suspend fun createContent(content: Content): RegisteredContent?
suspend fun deleteContent(id: ContentId): Boolean
}
diff --git a/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/DateTimeUtils.kt b/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/DateTimeUtils.kt
new file mode 100644
index 00000000..3beef0cd
--- /dev/null
+++ b/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/DateTimeUtils.kt
@@ -0,0 +1,9 @@
+package com.insanusmokrassar.postssystem.core.utils
+
+import org.joda.time.DateTime
+
+fun DateTime?.orMin(): DateTime = this ?: MIN_DATE
+fun DateTime?.orMax(): DateTime = this ?: MAX_DATE
+
+private val MIN_DATE = DateTime(Long.MIN_VALUE)
+private val MAX_DATE = DateTime(Long.MAX_VALUE)
diff --git a/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/pagination/Pagination.kt b/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/pagination/Pagination.kt
index a8496b9d..c58d4953 100644
--- a/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/pagination/Pagination.kt
+++ b/core/src/main/kotlin/com/insanusmokrassar/postssystem/core/utils/pagination/Pagination.kt
@@ -1,5 +1,7 @@
package com.insanusmokrassar.postssystem.core.utils.pagination
+import kotlin.math.ceil
+
/**
* Base interface of pagination
*
@@ -33,3 +35,10 @@ val Pagination.firstIndex: Int
*/
val Pagination.lastIndex: Int
get() = firstIndex + size - 1
+
+/**
+ * Calculates pages count for given [datasetSize]
+ */
+fun Pagination.pagesCount(datasetSize: Int): Int {
+ return ceil(datasetSize.toDouble() / size).toInt()
+}
diff --git a/core/src/test/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryContentAPI.kt b/core/src/test/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryContentAPI.kt
new file mode 100644
index 00000000..795db98d
--- /dev/null
+++ b/core/src/test/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryContentAPI.kt
@@ -0,0 +1,67 @@
+package com.insanusmokrassar.postssystem.core.api
+
+import com.insanusmokrassar.postssystem.core.content.*
+import com.insanusmokrassar.postssystem.core.content.api.ContentAPI
+import com.insanusmokrassar.postssystem.core.utils.pagination.Pagination
+import com.insanusmokrassar.postssystem.core.utils.pagination.PaginationResult
+import com.insanusmokrassar.postssystem.core.utils.pagination.firstIndex
+import com.insanusmokrassar.postssystem.core.utils.pagination.pagesCount
+import kotlinx.coroutines.channels.BroadcastChannel
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.asFlow
+import kotlinx.serialization.ImplicitReflectionSerializer
+import java.util.*
+
+@ImplicitReflectionSerializer
+private fun generateId(): ContentId = UUID.randomUUID().toString()
+
+@ImplicitReflectionSerializer
+class InMemoryContentAPI(
+ initialContent: List<RegisteredContent> = emptyList()
+): ContentAPI {
+
+ override val contentCreatedFlow: Flow<RegisteredContent>
+ get() = contentCreatedBroadcastChannel.asFlow()
+
+ override val contentDeletedFlow: Flow<RegisteredContent>
+ get() = contentDeletedBroadcastChannel.asFlow()
+
+ private val contents: MutableMap<ContentId, RegisteredContent> = initialContent
+ .associateBy(RegisteredContent::id)
+ .toMutableMap()
+
+ private val contentCreatedBroadcastChannel = BroadcastChannel<RegisteredContent>(Channel.BUFFERED)
+ private val contentDeletedBroadcastChannel = BroadcastChannel<RegisteredContent>(Channel.BUFFERED)
+
+ override suspend fun createContent(content: Content): RegisteredContent? {
+ return content.createRegisteredEntity(generateId())?.also { registeredContent ->
+ contents[registeredContent.id] = registeredContent
+ contentCreatedBroadcastChannel.send(registeredContent)
+ }
+ }
+
+ override suspend fun getContentById(id: ContentId): RegisteredContent? = contents[id]
+
+ override suspend fun getContentByPagination(pagination: Pagination): PaginationResult<out RegisteredContent> {
+ return PaginationResult(
+ page = pagination.page,
+ pagesNumber = pagination.pagesCount(contents.size),
+ results = contents.values.drop(pagination.firstIndex).take(pagination.size)
+ )
+ }
+
+ override suspend fun deleteContent(id: ContentId): Boolean {
+ return contents.remove(id)?.also { content ->
+ contentDeletedBroadcastChannel.send(content)
+ } != null
+ }
+
+ private fun Content.createRegisteredEntity(id: ContentId): RegisteredContent? {
+ return when(this) {
+ is TextContent -> SimpleTextRegisteredContent(id, text)
+ is SpecialContent -> SimpleTextRegisteredContent(id, internalId)
+ else -> null
+ }
+ }
+}
\ No newline at end of file