#3841 Unit Test DepictsClient (#3842)

* #3468 Switch from RvRenderer to AdapterDelegates - replace SearchDepictionsRenderer

* #3468 Switch from RvRenderer to AdapterDelegates - replace UploadCategoryDepictionsRenderer

* #3468 Switch from RvRenderer to AdapterDelegates - update BaseAdapter to be easier to use

* #3468 Switch from RvRenderer to AdapterDelegates - replace SearchImagesRenderer

* #3468 Switch from RvRenderer to AdapterDelegates - replace SearchCategoriesRenderer

* #3468 Switch from RvRenderer to AdapterDelegates - replace NotificationRenderer

* #3468 Switch from RvRenderer to AdapterDelegates - replace UploadDepictsRenderer

* #3468 Switch from RvRenderer to AdapterDelegates - replace PlaceRenderer

* #3756 Convert SearchDepictionsFragment to use Pagination - convert SearchDepictionsFragment

* #3756 Convert SearchDepictionsFragment to use Pagination - fix presenter unit tests now that view is not nullable - fix Category prefix imports

* #3756 Convert SearchDepictionsFragment to use Pagination - test DataSource related classes

* #3756 Convert SearchDepictionsFragment to use Pagination - reset rx scheduler - ignore failing test

* #3760 Convert SearchCategoriesFragment to use Pagination - extract functionality of pagination to base classes - add category pagination

* #3772 Convert SearchImagesFragment to use Pagination  - convert SearchImagesFragment - tidy up showing the empty view - make search fragments show snackbar with appropriate text

* #3772 Convert SearchImagesFragment to use Pagination  - allow viewpager to load more data

* #3760 remove test that got re-added by merge

* #3760 remove duplicate dependency

* #3772 fix compilation

* #3780 Create media using a combination of Entities & MwQueryResult - construct media with an entity - move fields from media down to contribution - move dynamic fields outside of media - remove unused constructors - remove all unnecessary fetching of captions/descriptions - bump database version

* #3808 Construct media objects that depict an item id correctly - use generator to construct media for DepictedImages

* #3810 Convert DepictedImagesFragment to use Pagination - extract common media paging methods - convert to DepictedImages to use pagination

* #3810 Convert DepictedImagesFragment to use Pagination - rename base classes to better reflect usage

* #3810 Convert DepictedImagesFragment to use Pagination - map to empty result with no pages

* #3810 Convert DepictedImagesFragment to use Pagination - align test with returned values

* #3780 Create media using a combination of Entities & MwQueryResult - update wikicode to align with expected behaviour

* #3780 Create media using a combination of Entities & MwQueryResult - replace old site of thumbnail title with most relevant caption

* #3818 Convert SubDepictionListFragment to use Pagination - replace SubDepictionList with Child and Parent Fragments - replace contracts with simple presenter declarations - move classes to appropriate packages - delete unused network models - delete duplicated paging classes

* #3820 Convert CategoryImagesListFragment to use Pagination - replace CategoryImagesListFragment with CategoriesMediaFragment - disallow the construction of media objects without imageinfo

* #3822 Convert SubCategoryImagesListFragment to use Pagination - convert subcategories - add continuation support in category client - rely on interfaces for callbacks of PageableMediaFragments

* #3822 Convert SubCategoryImagesListFragment to use Pagination - convert parent categories - delete list fragment - creat base class to support continuation requests in clients

* #3822 Convert SubCategoryImagesListFragment to use Pagination - add tests for ParentCategoriesDataSource

* #3822 Convert SubCategoryImagesListFragment to use Pagination - remove no longer applicable test

* #3841 Unit Test DepictsClient - add tests

* #3841 Unit Test DepictsClient - fix return types

app/src/main/java/fr/free/nrw/commons/explore/depictions/DepictsClient.kt

@@ -1,9 +1,10 @@
 package fr.free.nrw.commons.explore.depictions
 
+import fr.free.nrw.commons.mwapi.Binding
 import fr.free.nrw.commons.mwapi.SparqlResponse
 import fr.free.nrw.commons.upload.depicts.DepictsInterface
 import fr.free.nrw.commons.upload.structure.depictions.DepictedItem
-import io.reactivex.Observable
+import fr.free.nrw.commons.wikidata.model.DepictSearchItem
 import io.reactivex.Single
 import org.wikipedia.wikidata.Entities
 import java.util.*
@@ -14,9 +15,7 @@ import javax.inject.Singleton
  * Depicts Client to handle custom calls to Commons Wikibase APIs
  */
 @Singleton
-class DepictsClient @Inject constructor(
+class DepictsClient @Inject constructor(private val depictsInterface: DepictsInterface) {
-    private val depictsInterface: DepictsInterface
-) {
 
     /**
      * Search for depictions using the search item
@@ -25,22 +24,21 @@ class DepictsClient @Inject constructor(
     fun searchForDepictions(query: String?, limit: Int, offset: Int): Single<List<DepictedItem>> {
         val language = Locale.getDefault().language
         return depictsInterface.searchForDepicts(query, "$limit", language, language, "$offset")
-            .map { it.search.joinToString("|") { searchItem -> searchItem.id } }
+            .map { it.search.joinToString("|", transform = DepictSearchItem::id) }
-            .flatMap(::getEntities)
+            .mapToDepictions()
-            .map { it.entities().values.map(::DepictedItem) }
     }
 
     fun getEntities(ids: String): Single<Entities> {
         return depictsInterface.getEntities(ids)
     }
 
-    fun toDepictions(sparqlResponse: Observable<SparqlResponse>): Observable<List<DepictedItem>> {
+    fun toDepictions(sparqlResponse: Single<SparqlResponse>): Single<List<DepictedItem>> {
         return sparqlResponse.map {
-            it.results.bindings.joinToString("|") { binding ->
+            it.results.bindings.joinToString("|", transform = Binding::id)
-                binding.id
+        }.mapToDepictions()
     }
-        }
+
-            .flatMap { getEntities(it).toObservable() }
+    private fun Single<String>.mapToDepictions() =
+        flatMap(::getEntities)
         .map { it.entities().values.map(::DepictedItem) }
 }
-}

app/src/main/java/fr/free/nrw/commons/explore/depictions/child/PageableChildDepictionsDataSource.kt

@@ -11,7 +11,7 @@ class PageableChildDepictionsDataSource @Inject constructor(
     private val okHttpJsonApiClient: OkHttpJsonApiClient
 ) : PageableBaseDataSource<DepictedItem>(liveDataConverter) {
     override val loadFunction = { limit: Int, startPosition: Int ->
-        okHttpJsonApiClient.getChildDepictions(query, startPosition, limit).blockingFirst()
+        okHttpJsonApiClient.getChildDepictions(query, startPosition, limit).blockingGet()
     }
 }
 

app/src/main/java/fr/free/nrw/commons/explore/depictions/parent/PageableParentDepictionsDataSource.kt

@@ -11,7 +11,7 @@ class PageableParentDepictionsDataSource @Inject constructor(
     private val okHttpJsonApiClient: OkHttpJsonApiClient
 ) : PageableBaseDataSource<DepictedItem>(liveDataConverter) {
     override val loadFunction = { limit: Int, startPosition: Int ->
-        okHttpJsonApiClient.getParentDepictions(query, startPosition, limit).blockingFirst()
+        okHttpJsonApiClient.getParentDepictions(query, startPosition, limit).blockingGet()
     }
 }
 

app/src/main/java/fr/free/nrw/commons/mwapi/OkHttpJsonApiClient.java

@@ -209,7 +209,7 @@ public class OkHttpJsonApiClient {
    * Get the QIDs of all Wikidata items that are subclasses of the given Wikidata item. Example:
    * bridge -> suspended bridge, aqueduct, etc
    */
-  public Observable<List<DepictedItem>> getChildDepictions(String qid, int startPosition,
+  public Single<List<DepictedItem>> getChildDepictions(String qid, int startPosition,
       int limit) throws IOException {
     return depictedItemsFrom(sparqlQuery(qid, startPosition, limit,"/queries/subclasses_query.rq"));
   }
@@ -218,14 +218,14 @@ public class OkHttpJsonApiClient {
    * Get the QIDs of all Wikidata items that are subclasses of the given Wikidata item. Example:
    * bridge -> suspended bridge, aqueduct, etc
    */
-  public Observable<List<DepictedItem>> getParentDepictions(String qid, int startPosition,
+  public Single<List<DepictedItem>> getParentDepictions(String qid, int startPosition,
       int limit) throws IOException {
     return depictedItemsFrom(sparqlQuery(qid, startPosition, limit,
         "/queries/parentclasses_query.rq"));
   }
 
-  private Observable<List<DepictedItem>> depictedItemsFrom(Request request) {
+  private Single<List<DepictedItem>> depictedItemsFrom(Request request) {
-    return depictsClient.toDepictions(Observable.fromCallable(() -> {
+    return depictsClient.toDepictions(Single.fromCallable(() -> {
       try (ResponseBody body = okHttpClient.newCall(request).execute().body()) {
         return gson.fromJson(body.string(), SparqlResponse.class);
       }

app/src/test/kotlin/ModelFunctions.kt

@@ -7,6 +7,7 @@ import fr.free.nrw.commons.nearby.Label
 import fr.free.nrw.commons.nearby.Place
 import fr.free.nrw.commons.nearby.Sitelinks
 import fr.free.nrw.commons.upload.structure.depictions.DepictedItem
+import fr.free.nrw.commons.wikidata.model.DepictSearchItem
 import org.wikipedia.wikidata.*
 import java.util.*
 
@@ -63,6 +64,14 @@ fun media(
     depictionIds
 )
 
+fun depictSearchItem(
+    id: String = "id",
+    pageId: String = "pageid",
+    url: String = "url",
+    label: String = "label",
+    description: String = "description"
+) = DepictSearchItem(id, pageId, url, label, description)
+
 fun place(
     name: String = "name",
     label: Label? = null,

app/src/test/kotlin/fr/free/nrw/commons/explore/depictions/DepictsClientTest.kt

@@ -0,0 +1,69 @@
+package fr.free.nrw.commons.explore.depictions
+
+import com.nhaarman.mockitokotlin2.mock
+import com.nhaarman.mockitokotlin2.whenever
+import depictSearchItem
+import fr.free.nrw.commons.mwapi.Binding
+import fr.free.nrw.commons.mwapi.Result
+import fr.free.nrw.commons.mwapi.SparqlResponse
+import fr.free.nrw.commons.upload.depicts.DepictsInterface
+import fr.free.nrw.commons.wikidata.model.DepictSearchResponse
+import io.reactivex.Single
+import org.junit.Before
+import org.junit.Test
+import org.mockito.Mock
+import org.mockito.MockitoAnnotations
+import org.wikipedia.wikidata.Entities
+
+class DepictsClientTest {
+
+    @Mock
+    private lateinit var depictsInterface: DepictsInterface
+    private lateinit var depictsClient: DepictsClient
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        depictsClient = DepictsClient(depictsInterface)
+    }
+
+    @Test
+    fun searchForDepictions() {
+        val depictSearchResponse = mock<DepictSearchResponse>()
+        whenever(depictsInterface.searchForDepicts("query", "1", "en", "en", "0"))
+            .thenReturn(Single.just(depictSearchResponse))
+        whenever(depictSearchResponse.search).thenReturn(listOf(depictSearchItem("1"),depictSearchItem("2")))
+        val entities = mock<Entities>()
+        whenever(depictsInterface.getEntities("1|2")).thenReturn(Single.just(entities))
+        whenever(entities.entities()).thenReturn(emptyMap())
+        depictsClient.searchForDepictions("query", 1, 0)
+            .test()
+            .assertValue(emptyList())
+    }
+
+
+    @Test
+    fun getEntities() {
+        val entities = mock<Entities>()
+        whenever(depictsInterface.getEntities("ids")).thenReturn(Single.just(entities))
+        depictsClient.getEntities("ids").test().assertValue(entities)
+    }
+
+    @Test
+    fun toDepictions() {
+        val sparqlResponse = mock<SparqlResponse>()
+        val result = mock<Result>()
+        whenever(sparqlResponse.results).thenReturn(result)
+        val binding1 = mock<Binding>()
+        val binding2 = mock<Binding>()
+        whenever(result.bindings).thenReturn(listOf(binding1, binding2))
+        whenever(binding1.id).thenReturn("1")
+        whenever(binding2.id).thenReturn("2")
+        val entities = mock<Entities>()
+        whenever(depictsInterface.getEntities("1|2")).thenReturn(Single.just(entities))
+        whenever(entities.entities()).thenReturn(emptyMap())
+        depictsClient.toDepictions(Single.just(sparqlResponse))
+            .test()
+            .assertValue(emptyList())
+    }
+}

app/src/test/kotlin/fr/free/nrw/commons/explore/depictions/child/PageableChildDepictionsDataSourceTest.kt

@@ -1,11 +1,10 @@
 package fr.free.nrw.commons.explore.depictions.child
 
-import com.nhaarman.mockitokotlin2.verifyZeroInteractions
 import com.nhaarman.mockitokotlin2.whenever
 import depictedItem
 import fr.free.nrw.commons.explore.paging.LiveDataConverter
 import fr.free.nrw.commons.mwapi.OkHttpJsonApiClient
-import io.reactivex.Observable
+import io.reactivex.Single
 import org.hamcrest.CoreMatchers.`is`
 import org.hamcrest.MatcherAssert.assertThat
 import org.junit.Before
@@ -30,7 +29,7 @@ class PageableChildDepictionsDataSourceTest {
             PageableChildDepictionsDataSource(liveDataConverter, okHttpJsonApiClient)
         dataSource.onQueryUpdated("test")
         whenever(okHttpJsonApiClient.getChildDepictions("test", 0, 1))
-            .thenReturn(Observable.just(listOf(depictedItem())))
+            .thenReturn(Single.just(listOf(depictedItem())))
         assertThat(dataSource.loadFunction(1, 0), `is`(listOf(depictedItem())))
     }
 }

app/src/test/kotlin/fr/free/nrw/commons/explore/depictions/parent/PageableParentDepictionsDataSourceTest.kt

@@ -4,7 +4,7 @@ import com.nhaarman.mockitokotlin2.whenever
 import depictedItem
 import fr.free.nrw.commons.explore.paging.LiveDataConverter
 import fr.free.nrw.commons.mwapi.OkHttpJsonApiClient
-import io.reactivex.Observable
+import io.reactivex.Single
 import org.hamcrest.CoreMatchers.`is`
 import org.hamcrest.MatcherAssert.assertThat
 import org.junit.Before
@@ -30,7 +30,7 @@ class PageableParentDepictionsDataSourceTest {
             PageableParentDepictionsDataSource(liveDataConverter, okHttpJsonApiClient)
         dataSource.onQueryUpdated("test")
         whenever(okHttpJsonApiClient.getParentDepictions("test", 0, 1))
-            .thenReturn(Observable.just(listOf(depictedItem())))
+            .thenReturn(Single.just(listOf(depictedItem())))
         assertThat(dataSource.loadFunction(1, 0), `is`(listOf(depictedItem())))
     }
 }