test(useQuery): ensure updateQuery can modify cache

Author: syllomex

packages/test-e2e-composable-vue3/src/components/UpdateQuery.vue

@@ -0,0 +1,141 @@
+<script lang="ts" setup>
+import { useMutation, useQuery } from '@vue/apollo-composable'
+import gql from 'graphql-tag'
+import { computed, ref } from 'vue'
+import MessageItem from './MessageItem.vue'
+
+interface Channel {
+  id: string
+  label: string
+}
+
+const channelsQuery = useQuery<{ channels: Channel[] }>(gql`
+  query channels {
+    channels {
+      id
+      label
+    }
+  }
+`)
+
+const channels = computed(() => channelsQuery.result.value?.channels ?? [])
+
+const selectedChannelId = ref<string | null>(null)
+
+const selectedChannelQuery = useQuery(gql`
+  query channel ($id: ID!) {
+    channel (id: $id) {
+      id
+      label
+      messages {
+        id
+        text
+      }
+    }
+  }
+`, () => ({
+  id: selectedChannelId.value,
+}), () => ({
+  enabled: !!selectedChannelId.value,
+}))
+
+const addMessageMutation = useMutation(gql`
+  mutation sendMessage ($input: AddMessageInput!) {
+    message: addMessage (input: $input) {
+      id
+      text
+    }
+  }
+`)
+
+const selectedChannel = computed(() => selectedChannelQuery.result.value?.channel)
+
+const newMessageText = ref('')
+
+async function sendMessage () {
+  if (!newMessageText.value.length) return
+
+  const result = await addMessageMutation.mutate({
+    input: {
+      channelId: selectedChannelId.value,
+      text: newMessageText.value,
+    },
+  })
+
+  newMessageText.value = ''
+
+  selectedChannelQuery.updateQuery(previousResult => ({
+    ...previousResult,
+    channel: {
+      ...previousResult.channel,
+      messages: [
+        ...previousResult.channel.messages,
+        result?.data.message,
+      ],
+    },
+  }))
+}
+</script>
+
+<template>
+  <div class="h-full flex flex-col">
+    <div class="flex h-full">
+      <div class="flex flex-col">
+        <button
+          v-for="channel of channels"
+          :key="channel.id"
+          class="channel-btn p-4"
+          :class="{
+            'bg-green-200': selectedChannelId === channel.id,
+          }"
+          @click="selectedChannelId = channel.id"
+        >
+          {{ channel.label }}
+        </button>
+      </div>
+
+      <div
+        v-if="selectedChannel"
+        class="the-channel flex flex-col w-full h-full overflow-auto"
+      >
+        <div class="flex-none p-6 border-b border-gray-200 bg-white">
+          # {{ selectedChannel.label }}
+        </div>
+
+        <div class="flex-1 overflow-y-auto">
+          <MessageItem
+            v-for="message of selectedChannel.messages"
+            :key="message.id"
+            :message="message"
+            class="m-2"
+          />
+        </div>
+
+        <div class="flex gap-x-2 p-4">
+          <div class="border border-gray-200 rounded-lg bg-white flex-1">
+            <input
+              v-model="newMessageText"
+              type="text"
+              class="message-input w-full h-full bg-transparent px-3"
+              placeholder="Type a message..."
+            >
+          </div>
+
+          <button
+            class="send-message-btn bg-green-200 py-3 px-4 rounded-lg"
+            @click="sendMessage"
+          >
+            Send
+          </button>
+        </div>
+      </div>
+
+      <div
+        v-else
+        class="no-data"
+      >
+        No data
+      </div>
+    </div>
+  </div>
+</template>

packages/test-e2e-composable-vue3/src/router.ts

@@ -93,5 +93,9 @@ export const router = createRouter({
         layout: 'blank',
       },
     },
+    {
+      path: '/update-query',
+      component: () => import('./components/UpdateQuery.vue'),
+    },
   ],
 })

packages/test-e2e-composable-vue3/tests/e2e/specs/updateQuery.cy.ts

@@ -0,0 +1,30 @@
+describe('updateQuery', () => {
+  beforeEach(() => {
+    cy.task('db:reset')
+    cy.visit('/update-query')
+  })
+
+  it('should add new message to cache using updateQuery', () => {
+    cy.get('.channel-btn').eq(0).click()
+    cy.get('.message-input').type('hello 1')
+    cy.get('.message').should('have.lengthOf', 0)
+    cy.get('.send-message-btn').click()
+    cy.get('.message').should('have.lengthOf', 1)
+    cy.get('.message-input').type('hello 2')
+    cy.get('.send-message-btn').click()
+    cy.get('.message').should('have.lengthOf', 2)
+    cy.contains('.message', 'hello 1')
+    cy.contains('.message', 'hello 2')
+
+    cy.get('.channel-btn').eq(1).click()
+    cy.get('.message-input').type('hello 3')
+    cy.get('.message').should('have.lengthOf', 0)
+    cy.get('.send-message-btn').click()
+    cy.get('.message').should('have.lengthOf', 1)
+    cy.get('.message-input').type('hello 4')
+    cy.get('.send-message-btn').click()
+    cy.get('.message').should('have.lengthOf', 2)
+    cy.contains('.message', 'hello 3')
+    cy.contains('.message', 'hello 4')
+  })
+})