Add tests for SearchUtils

Change-Id: Ie69d87ca97c0471ae1b93ac4e1fabd34887337cd
diff --git a/src/test/java/com/googlesource/gerrit/plugins/its/phabricator/conduit/SearchUtilsTest.java b/src/test/java/com/googlesource/gerrit/plugins/its/phabricator/conduit/SearchUtilsTest.java
new file mode 100644
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--- /dev/null
+++ b/src/test/java/com/googlesource/gerrit/plugins/its/phabricator/conduit/SearchUtilsTest.java
@@ -0,0 +1,79 @@
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.its.phabricator.conduit;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.collect.Lists;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import com.googlesource.gerrit.plugins.its.base.testutil.LoggingMockingTestCase;
+import com.googlesource.gerrit.plugins.its.phabricator.conduit.results.PhabObject;
+import java.util.List;
+import java.util.stream.Stream;
+import org.junit.Test;
+
+public class SearchUtilsTest extends LoggingMockingTestCase {
+  @Test
+  public void testStreamEmpty() throws Exception {
+    JsonObject searchResult = new JsonObject();
+    searchResult.add("data", new JsonArray());
+
+    SearchUtils searchUtils = createSearchUtils();
+    Stream<PhabObject> stream = searchUtils.stream(searchResult, PhabObject.class);
+    List<String> streamAsPhidList = Lists.newArrayList(stream.map(o -> o.getPhid()).iterator());
+    assertThat(streamAsPhidList).isEmpty();
+  }
+
+  @Test
+  public void testStreamSingle() throws Exception {
+    JsonArray data = new JsonArray();
+    data.add(createJsonOfPhabObject("PHID1"));
+
+    JsonObject searchResult = new JsonObject();
+    searchResult.add("data", data);
+
+    SearchUtils searchUtils = createSearchUtils();
+    Stream<PhabObject> stream = searchUtils.stream(searchResult, PhabObject.class);
+    List<String> streamAsPhidList = Lists.newArrayList(stream.map(o -> o.getPhid()).iterator());
+    assertThat(streamAsPhidList).containsExactly("PHID1");
+  }
+
+  @Test
+  public void testStreamMultiple() throws Exception {
+    JsonArray data = new JsonArray();
+    data.add(createJsonOfPhabObject("PHID1"));
+    data.add(createJsonOfPhabObject("PHID2"));
+    data.add(createJsonOfPhabObject("PHID3"));
+
+    JsonObject searchResult = new JsonObject();
+    searchResult.add("data", data);
+
+    SearchUtils searchUtils = createSearchUtils();
+    Stream<PhabObject> stream = searchUtils.stream(searchResult, PhabObject.class);
+    List<String> streamAsPhidList = Lists.newArrayList(stream.map(o -> o.getPhid()).iterator());
+    assertThat(streamAsPhidList).containsExactly("PHID1", "PHID2", "PHID3");
+  }
+
+  private SearchUtils createSearchUtils() {
+    return new SearchUtils();
+  }
+
+  private JsonObject createJsonOfPhabObject(String phid) {
+    JsonObject ret = new JsonObject();
+    ret.addProperty("phid", phid);
+
+    return ret;
+  }
+}