Fix submit rule evaluation for non blocking labels

Putting a negative score on a label configured as `NoBlock` causes
the submit button to be disabled.  However, a `NoBlock` label is
supposed to be purely informational and its values not considered
when determining whether a change is submittable.

Fix the submit rule evaluation to prevent the button from being
disabled.

Also add an integration test.

Bug: Issue 2453
Change-Id: I0825b3c2d4774c17d523ac5f7890b983fa07af39

gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/rest/change/BUCK

@@ -1,8 +1,8 @@
 include_defs('//gerrit-acceptance-tests/tests.defs')
 
 acceptance_tests(
-  srcs = ['ChangeMessagesIT.java', 'DeleteDraftChangeIT.java',
-          'DeleteDraftPatchSetIT.java'],
+  srcs = ['CustomLabelIT.java', 'ChangeMessagesIT.java',
+          'DeleteDraftChangeIT.java', 'DeleteDraftPatchSetIT.java'],
   deps = [
     ':util',
     '//gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/git:util',
@@ -37,6 +37,7 @@ java_library(
   deps = [
     '//lib:guava',
     '//gerrit-reviewdb:server',
+    '//gerrit-acceptance-tests:lib',
   ],
   visibility = ['//gerrit-acceptance-tests/...'],
 )

gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/rest/change/ChangeInfo.java

@@ -15,8 +15,10 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.server.change.ChangeJson.LabelInfo;
 
 import java.util.List;
+import java.util.Map;
 
 public class ChangeInfo {
   String id;
@@ -25,4 +27,5 @@ public class ChangeInfo {
   List<ChangeMessageInfo> messages;
   Change.Status status;
   public Boolean starred;
+  Map<String, LabelInfo> labels;
 }

gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/rest/change/CustomLabelIT.java

@@ -0,0 +1,207 @@
+// Copyright (C) 2014 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.acceptance.rest.change;
+
+import static com.google.gerrit.acceptance.git.GitUtil.cloneProject;
+import static com.google.gerrit.acceptance.git.GitUtil.createProject;
+import static com.google.gerrit.acceptance.git.GitUtil.initSsh;
+import static com.google.gerrit.server.project.Util.REGISTERED;
+import static com.google.gerrit.server.project.Util.category;
+import static com.google.gerrit.server.project.Util.grant;
+import static com.google.gerrit.server.project.Util.value;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import com.google.common.collect.Maps;
+import com.google.gerrit.acceptance.AbstractDaemonTest;
+import com.google.gerrit.acceptance.AccountCreator;
+import com.google.gerrit.acceptance.RestResponse;
+import com.google.gerrit.acceptance.RestSession;
+import com.google.gerrit.acceptance.SshSession;
+import com.google.gerrit.acceptance.TestAccount;
+import com.google.gerrit.acceptance.git.PushOneCommit;
+import com.google.gerrit.common.changes.ListChangesOption;
+import com.google.gerrit.common.data.LabelType;
+import com.google.gerrit.common.data.Permission;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.OutputFormat;
+import com.google.gerrit.server.change.ChangeJson.LabelInfo;
+import com.google.gerrit.server.config.AllProjectsName;
+import com.google.gerrit.server.git.MetaDataUpdate;
+import com.google.gerrit.server.git.ProjectConfig;
+import com.google.gerrit.server.project.ProjectCache;
+import com.google.gwtorm.server.SchemaFactory;
+import com.google.inject.Inject;
+
+import org.apache.http.HttpStatus;
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+
+public class CustomLabelIT extends AbstractDaemonTest {
+
+  @Inject
+  private ProjectCache projectCache;
+
+  @Inject
+  private AllProjectsName allProjects;
+
+  @Inject
+  private MetaDataUpdate.Server metaDataUpdateFactory;
+
+  @Inject
+  private AccountCreator accounts;
+
+  @Inject
+  private SchemaFactory<ReviewDb> reviewDbProvider;
+
+  private TestAccount admin;
+
+  private RestSession session;
+  private Git git;
+  private ReviewDb db;
+
+  private final LabelType Q = category("CustomLabel",
+      value(1, "Positive"),
+      value(0, "No score"),
+      value(-1, "Negative"));
+
+  @Before
+  public void setUp() throws Exception {
+    admin = accounts.admin();
+    session = new RestSession(server, admin);
+    initSsh(admin);
+    Project.NameKey project = new Project.NameKey("p");
+    SshSession sshSession = new SshSession(server, admin);
+    createProject(sshSession, project.get());
+    git = cloneProject(sshSession.getUrl() + "/" + project.get());
+    sshSession.close();
+    db = reviewDbProvider.open();
+    ProjectConfig cfg = projectCache.checkedGet(allProjects).getConfig();
+    grant(cfg, Permission.forLabel(Q.getName()), -1, +1, REGISTERED,
+        "refs/heads/*");
+    saveProjectConfig(cfg);
+  }
+
+  @After
+  public void cleanup() {
+    db.close();
+  }
+
+  @Test
+  public void customLabelNoOp_NegativeVoteNotBlock() throws Exception {
+    Q.setFunctionName("NoOp");
+    saveLabelConfig();
+    ChangeInfo c = get(disliked(change()));
+    LabelInfo q = c.labels.get(Q.getName());
+    assertEquals(1, q.all.size());
+    assertNull(q.rejected);
+    assertNotNull(q.disliked);
+  }
+
+  @Test
+  public void customLabelNoBlock_NegativeVoteNotBlock() throws Exception {
+    Q.setFunctionName("NoBlock");
+    saveLabelConfig();
+    ChangeInfo c = get(disliked(change()));
+    LabelInfo q = c.labels.get(Q.getName());
+    assertEquals(1, q.all.size());
+    assertNull(q.rejected);
+    assertNotNull(q.disliked);
+  }
+
+  @Test
+  public void customLabelMaxNoBlock_NegativeVoteNotBlock() throws Exception {
+    Q.setFunctionName("MaxNoBlock");
+    saveLabelConfig();
+    ChangeInfo c = get(disliked(change()));
+    LabelInfo q = c.labels.get(Q.getName());
+    assertEquals(1, q.all.size());
+    assertNull(q.rejected);
+    assertNotNull(q.disliked);
+  }
+
+  @Test
+  public void customLabelAnyWithBlock_NegativeVoteBlock() throws Exception {
+    Q.setFunctionName("AnyWithBlock");
+    saveLabelConfig();
+    ChangeInfo c = get(disliked(change()));
+    LabelInfo q = c.labels.get(Q.getName());
+    assertEquals(1, q.all.size());
+    assertNull(q.disliked);
+    assertNotNull(q.rejected);
+  }
+
+  @Test
+  public void customLabelMaxWithBlock_NegativeVoteBlock() throws Exception {
+    saveLabelConfig();
+    ChangeInfo c = get(disliked(change()));
+    LabelInfo q = c.labels.get(Q.getName());
+    assertEquals(1, q.all.size());
+    assertNull(q.disliked);
+    assertNotNull(q.rejected);
+  }
+
+  private String disliked(String changeId) throws IOException {
+    ReviewInput in = new ReviewInput();
+    in.labels = Maps.newHashMap();
+    in.labels.put(Q.getName(), -1);
+    RestResponse r =
+        session.post("/changes/" + changeId + "/revisions/current/review",
+            in);
+    assertEquals(HttpStatus.SC_OK, r.getStatusCode());
+    r.consume();
+    return changeId;
+  }
+
+  private ChangeInfo get(String changeId) throws IOException {
+    RestResponse r = session.get("/changes/"
+        + changeId
+        + "?o="
+        + ListChangesOption.DETAILED_LABELS
+        + "&o="
+        + ListChangesOption.LABELS);
+    return OutputFormat.JSON.newGson()
+        .fromJson(r.getReader(), ChangeInfo.class);
+  }
+
+  private String change() throws GitAPIException,
+      IOException {
+    PushOneCommit push = new PushOneCommit(db, admin.getIdent());
+    return push.to(git, "refs/for/master").getChangeId();
+  }
+
+  private void saveLabelConfig() throws Exception {
+    ProjectConfig cfg = projectCache.checkedGet(allProjects).getConfig();
+    cfg.getLabelSections().put(Q.getName(), Q);
+    saveProjectConfig(cfg);
+  }
+
+  private void saveProjectConfig(ProjectConfig cfg) throws Exception {
+    MetaDataUpdate md = metaDataUpdateFactory.create(allProjects);
+    try {
+      cfg.commit(md);
+    } finally {
+      md.close();
+    }
+    projectCache.evict(allProjects);
+  }
+}

gerrit-server/src/main/java/com/google/gerrit/server/change/ChangeJson.java

@@ -454,21 +454,13 @@ public class ChangeJson {
       return;
     }
 
-    if (score != 0) {
-      if (score == type.getMin().getValue()) {
-        label.rejected = accountLoader.get(accountId);
-      } else if (score == type.getMax().getValue()) {
-        label.approved = accountLoader.get(accountId);
-      } else if (score < 0) {
-        label.disliked = accountLoader.get(accountId);
-        label.value = score;
-      } else if (score > 0 && label.disliked == null) {
-        label.recommended = accountLoader.get(accountId);
-        label.value = score;
-      }
+    if (score < 0) {
+      label.disliked = accountLoader.get(accountId);
+      label.value = score;
+    } else if (score > 0 && label.disliked == null) {
+      label.recommended = accountLoader.get(accountId);
+      label.value = score;
     }
-
-    return;
   }
 
   private void setAllApprovals(ChangeData cd,
@@ -984,19 +976,19 @@ public class ChangeJson {
     String message;
   }
 
-  static class LabelInfo {
+  public static class LabelInfo {
     transient SubmitRecord.Label.Status _status;
 
-    AccountInfo approved;
-    AccountInfo rejected;
-    AccountInfo recommended;
-    AccountInfo disliked;
-    List<ApprovalInfo> all;
+    public AccountInfo approved;
+    public AccountInfo rejected;
+    public AccountInfo recommended;
+    public AccountInfo disliked;
+    public List<ApprovalInfo> all;
 
-    Map<String, String> values;
+    public Map<String, String> values;
 
-    Short value;
-    Boolean optional;
+    public Short value;
+    public Boolean optional;
 
     void addApproval(ApprovalInfo ai) {
       if (all == null) {