Fix timeout waiting for endpoint properties initialization

gr-confirm-dialog contains gr-endpoint-decorator. gr-endpoint-param
with the name action is bound to gr-confirm-dialog.action property.
During the initialization, gr-endpoint-decorator waits while all
properties are assigned. If a server returns revisionActions without
submit property, then thr binding is not updated and
gr-endpoint-decorator doesn't receive the notification when
initialization is complete.

Bug: Issue 11120
Change-Id: I529812c45edecf584897a4168fde28835feb316e

3 files changed, 84 insertions, 2 deletions

diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.html b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.html
index e69d48f13f..1e50e4bfba 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.html
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.html
@@ -176,7 +176,7 @@ limitations under the License.
           on-cancel="_handleConfirmDialogCancel"
           branch="[[change.branch]]"
           has-parent="[[hasParent]]"
-          rebase-on-current="[[revisionActions.rebase.rebaseOnCurrent]]"
+          rebase-on-current="[[_revisionRebaseAction.rebaseOnCurrent]]"
           hidden></gr-confirm-rebase-dialog>
       <gr-confirm-cherrypick-dialog id="confirmCherrypick"
           class="confirmDialog"
@@ -216,7 +216,7 @@ limitations under the License.
           id="confirmSubmitDialog"
           class="confirmDialog"
           change="[[change]]"
-          action="[[revisionActions.submit]]"
+          action="[[_revisionSubmitAction]]"
           on-cancel="_handleConfirmDialogCancel"
           on-confirm="_handleSubmitConfirm" hidden></gr-confirm-submit-dialog>
       <gr-dialog id="createFollowUpDialog"
diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.js b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.js
index 83a454b20b..02bf783772 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.js
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.js
@@ -271,6 +271,20 @@
         type: Object,
         value() { return {}; },
       },
+      // If property binds directly to [[revisionActions.submit]] it is not
+      // updated when revisionActions doesn't contain submit action.
+      /** @type {?} */
+      _revisionSubmitAction: {
+        type: Object,
+        computed: '_getSubmitAction(revisionActions)',
+      },
+      // If property binds directly to [[revisionActions.rebase]] it is not
+      // updated when revisionActions doesn't contain rebase action.
+      /** @type {?} */
+      _revisionRebaseAction: {
+        type: Object,
+        computed: '_getRebaseAction(revisionActions)',
+      },
       privateByDefault: String,
 
       _loading: {
@@ -415,6 +429,28 @@
       this._handleLoadingComplete();
     },
 
+    _getSubmitAction(revisionActions) {
+      return this._getRevisionAction(revisionActions, 'submit', null);
+    },
+
+    _getRebaseAction(revisionActions) {
+      return this._getRevisionAction(revisionActions, 'rebase',
+        {rebaseOnCurrent: null}
+      );
+    },
+
+    _getRevisionAction(revisionActions, actionName, emptyActionValue) {
+      if (!revisionActions) {
+        return undefined;
+      }
+      if (revisionActions[actionName] === undefined) {
+        // Return null to fire an event when reveisionActions was loaded
+        // but doesn't contain actionName. undefined doesn't fire an event
+        return emptyActionValue;
+      }
+      return revisionActions[actionName];
+    },
+
     reload() {
       if (!this.changeNum || !this.latestPatchNum) {
         return Promise.resolve();
diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html
index 184e175419..b88e06b3d8 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html
@@ -1513,4 +1513,50 @@ limitations under the License.
       assert.equal(reportStub.lastCall.args[0], 'type-key');
     });
   });
+
+  suite('getChangeRevisionActions returns only some actions', () => {
+    let element;
+    let sandbox;
+    let changeRevisionActions;
+
+    setup(() => {
+      stub('gr-rest-api-interface', {
+        getChangeRevisionActions() {
+          return Promise.resolve(changeRevisionActions);
+        },
+        send(method, url, payload) {
+          return Promise.reject(new Error('error'));
+        },
+        getProjectConfig() { return Promise.resolve({}); },
+      });
+
+      sandbox = sinon.sandbox.create();
+      sandbox.stub(Gerrit, 'awaitPluginsLoaded').returns(Promise.resolve());
+
+      element = fixture('basic');
+      // getChangeRevisionActions is not called without
+      // set the following properies
+      element.change = {};
+      element.changeNum = '42';
+      element.latestPatchNum = '2';
+
+
+      sandbox.stub(element.$.confirmCherrypick.$.restAPI,
+          'getRepoBranches').returns(Promise.resolve([]));
+      sandbox.stub(element.$.confirmMove.$.restAPI,
+          'getRepoBranches').returns(Promise.resolve([]));
+      return element.reload();
+    });
+
+    teardown(() => {
+      sandbox.restore();
+    });
+
+    test('confirmSubmitDialog and confirmRebase properties are changed', () => {
+      changeRevisionActions = {};
+      element.reload();
+      assert.strictEqual(element.$.confirmSubmitDialog.action, null);
+      assert.strictEqual(element.$.confirmRebase.rebaseOnCurrent, null);
+    });
+  });
 </script>