Finish mutation call for snapshot deletion

Resolves MS-373

client/cypress/integration/frontend/modules/snapshots.spec.js

@@ -2,6 +2,33 @@ import module from '../../../fixtures/module.minimal';
 import {getMinimalMe} from '../../../support/helpers';
 import {hasOperationName} from '../../../support/graphql';
 
+const mockDeleteSnapshot = (success) => {
+  cy.intercept('POST', '/api/graphql', (req) => {
+    if (hasOperationName(req, 'DeleteSnapshot')) {
+      let result;
+      if (success) {
+        result = {
+              message: 'yay!',
+              __typename: 'Success'
+            };
+      } else {
+        result = {
+          reason: 'Not the owner',
+          __typename: 'NotOwner'
+        };
+      }
+      req.reply({
+        data: {
+          deleteSnapshot: {
+            result
+          }
+        },
+      });
+
+    }
+  });
+};
+
 const mockUpdateSnapshot = (title) => {
   cy.intercept('POST', '/api/graphql', (req) => {
     if (hasOperationName(req, 'UpdateSnapshot')) {
@@ -133,10 +160,11 @@ describe('Snapshot', () => {
 
   it('Deletes Snapshot', () => {
     cy.mockGraphqlOps(operations(true));
+    mockDeleteSnapshot(true);
     cy.visit('module/miteinander-reden/snapshots');
     cy.getByDataCy('snapshot-entry').should('have.length', 1);
     cy.getByDataCy('delete-snapshot-button').click();
-    cy.getByDataCy('confirm-button').click();
+    cy.getByDataCy('modal-save-button').click();
-    cy.getByDataCy('snapshot').should('have.length', 0);
+    cy.getByDataCy('snapshot-entry').should('have.length', 0);
   });
 });

client/src/components/modules/SnapshotListItem.vue

@@ -51,6 +51,7 @@
   import gql from 'graphql-tag';
   import PenIcon from '@/components/icons/PenIcon';
   import TrashIcon from '@/components/icons/TrashIcon';
+  import { removeAtIndex } from '@/graphql/immutable-operations';
 
   export default {
     props: {
@@ -127,11 +128,26 @@
                   const slug = this.$route.params.slug;
                   const query = SNAPSHOTS_QUERY;
                   const variables = {
-                    slug
+                    slug,
                   };
-                  const module = store.readQuery({
+                  const {module} = store.readQuery({
                     query,
-                    variables
+                    variables,
+                  });
+                  const index = module.snapshots.findIndex(snapshot => snapshot.id === this.snapshot.id);
+                  const snapshots = removeAtIndex(module.snapshots, index);
+
+                  const data = {
+                    module: {
+                      ...module,
+                      snapshots
+                    }
+                  };
+
+                  store.writeQuery({
+                    query,
+                    variables,
+                    data
                   });
 
                 }