Implement AttentionSetUpdateSubject

Add "AttentionSetUpdateSubject" and then use it in AttentionSetIT.

Change-Id: I3fd4196c3c31c6aa295a65538a5ab6b7bdfd1bd9

java/com/google/gerrit/extensions/restapi/testing/AttentionSetUpdateSubject.java

@@ -0,0 +1,83 @@
+// 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.google.gerrit.extensions.restapi.testing;
+
+import static com.google.common.truth.Truth.assertAbout;
+
+import com.google.common.truth.ComparableSubject;
+import com.google.common.truth.FailureMetadata;
+import com.google.common.truth.StringSubject;
+import com.google.common.truth.Subject;
+import com.google.gerrit.entities.Account;
+import com.google.gerrit.entities.AttentionSetUpdate;
+
+/** {@link Subject} for doing assertions on {@link AttentionSetUpdate}s. */
+public class AttentionSetUpdateSubject extends Subject {
+
+  /**
+   * Starts fluent chain to do assertions on a {@link AttentionSetUpdate}.
+   *
+   * @param attentionSetUpdate the {@link AttentionSetUpdate} on which assertions should be done
+   * @return the created {@link AttentionSetUpdateSubject}
+   */
+  public static AttentionSetUpdateSubject assertThat(AttentionSetUpdate attentionSetUpdate) {
+    return assertAbout(attentionSetUpdates()).that(attentionSetUpdate);
+  }
+
+  private static Factory<AttentionSetUpdateSubject, AttentionSetUpdate> attentionSetUpdates() {
+    return AttentionSetUpdateSubject::new;
+  }
+
+  private final AttentionSetUpdate attentionSetUpdate;
+
+  private AttentionSetUpdateSubject(
+      FailureMetadata metadata, AttentionSetUpdate attentionSetUpdate) {
+    super(metadata, attentionSetUpdate);
+    this.attentionSetUpdate = attentionSetUpdate;
+  }
+
+  /**
+   * Returns a {@link ComparableSubject} for the account ID of attention set update.
+   *
+   * @return {@link ComparableSubject} for the account ID of attention set update
+   */
+  public ComparableSubject<Account.Id> hasAccountIdThat() {
+    return check("account()").that(attentionSetUpdate().account());
+  }
+
+  /**
+   * Returns a {@link StringSubject} for the reason of attention set update.
+   *
+   * @return {@link StringSubject} for the reason of attention set update
+   */
+  public StringSubject hasReasonThat() {
+    return check("reason()").that(attentionSetUpdate().reason());
+  }
+
+  /**
+   * Returns a {@link ComparableSubject} for the {@link AttentionSetUpdate.Operation} of attention
+   * set update.
+   *
+   * @return {@link ComparableSubject} for the {@link AttentionSetUpdate.Operation} of attention set
+   *     update
+   */
+  public ComparableSubject<AttentionSetUpdate.Operation> hasOperationThat() {
+    return check("operation()").that(attentionSetUpdate().operation());
+  }
+
+  private AttentionSetUpdate attentionSetUpdate() {
+    isNotNull();
+    return attentionSetUpdate;
+  }
+}

java/com/google/gerrit/extensions/restapi/testing/BUILD

@@ -6,6 +6,7 @@ java_library(
     srcs = glob(["**/*.java"]),
     visibility = ["//visibility:public"],
     deps = [
+        "//java/com/google/gerrit/entities",
         "//java/com/google/gerrit/extensions:api",
         "//java/com/google/gerrit/truth",
         "//lib/truth",