From 5c3138499f6f2d76cfc9be324523c725f3114d32 Mon Sep 17 00:00:00 2001
From: yosuke ota <otameshiyo23@gmail.com>
Date: Sat, 3 Jul 2021 22:03:55 +0900
Subject: [PATCH 1/2] Update `vue/require-prop-types` rule to support `<script
 setup>`

---
 lib/rules/require-explicit-emits.js       | 424 +++++++++++++---------
 tests/lib/rules/require-explicit-emits.js | 184 ++++++++++
 2 files changed, 445 insertions(+), 163 deletions(-)

diff --git a/lib/rules/require-explicit-emits.js b/lib/rules/require-explicit-emits.js
index 797428254..34b557b4b 100644
--- a/lib/rules/require-explicit-emits.js
+++ b/lib/rules/require-explicit-emits.js
@@ -7,8 +7,10 @@
 /**
  * @typedef {import('../utils').ComponentArrayEmit} ComponentArrayEmit
  * @typedef {import('../utils').ComponentObjectEmit} ComponentObjectEmit
+ * @typedef {import('../utils').ComponentTypeEmit} ComponentTypeEmit
  * @typedef {import('../utils').ComponentArrayProp} ComponentArrayProp
  * @typedef {import('../utils').ComponentObjectProp} ComponentObjectProp
+ * @typedef {import('../utils').ComponentTypeProp} ComponentTypeProp
  * @typedef {import('../utils').VueObjectData} VueObjectData
  */
 
@@ -105,42 +107,43 @@ module.exports = {
     ],
     messages: {
       missing:
-        'The "{{name}}" event has been triggered but not declared on `emits` option.',
-      addOneOption: 'Add the "{{name}}" to `emits` option.',
+        'The "{{name}}" event has been triggered but not declared on {{emitsKind}}.',
+      addOneOption: 'Add the "{{name}}" to {{emitsKind}}.',
       addArrayEmitsOption:
-        'Add the `emits` option with array syntax and define "{{name}}" event.',
+        'Add the {{emitsKind}} with array syntax and define "{{name}}" event.',
       addObjectEmitsOption:
-        'Add the `emits` option with object syntax and define "{{name}}" event.'
+        'Add the {{emitsKind}} with object syntax and define "{{name}}" event.'
     }
   },
   /** @param {RuleContext} context */
   create(context) {
     const options = context.options[0] || {}
     const allowProps = !!options.allowProps
-    /** @type {Map<ObjectExpression, { contextReferenceIds: Set<Identifier>, emitReferenceIds: Set<Identifier> }>} */
+    /** @type {Map<ObjectExpression | Program, { contextReferenceIds: Set<Identifier>, emitReferenceIds: Set<Identifier> }>} */
     const setupContexts = new Map()
-    /** @type {Map<ObjectExpression, (ComponentArrayEmit | ComponentObjectEmit)[]>} */
+    /** @type {Map<ObjectExpression | Program, (ComponentArrayEmit | ComponentObjectEmit | ComponentTypeEmit)[]>} */
     const vueEmitsDeclarations = new Map()
-    /** @type {Map<ObjectExpression, (ComponentArrayProp | ComponentObjectProp)[]>} */
+    /** @type {Map<ObjectExpression | Program, (ComponentArrayProp | ComponentObjectProp | ComponentTypeProp)[]>} */
     const vuePropsDeclarations = new Map()
 
     /**
-     * @typedef {object} VueTemplateObjectData
-     * @property {'export' | 'mark' | 'definition'} type
-     * @property {ObjectExpression} object
-     * @property {(ComponentArrayEmit | ComponentObjectEmit)[]} emits
-     * @property {(ComponentArrayProp | ComponentObjectProp)[]} props
+     * @typedef {object} VueTemplateDefineData
+     * @property {'export' | 'mark' | 'definition' | 'setup'} type
+     * @property {ObjectExpression | Program} define
+     * @property {(ComponentArrayEmit | ComponentObjectEmit | ComponentTypeEmit)[]} emits
+     * @property {(ComponentArrayProp | ComponentObjectProp | ComponentTypeProp)[]} props
+     * @property {CallExpression} [defineEmits]
      */
-    /** @type {VueTemplateObjectData | null} */
-    let vueTemplateObjectData = null
+    /** @type {VueTemplateDefineData | null} */
+    let vueTemplateDefineData = null
 
     /**
-     * @param {(ComponentArrayEmit | ComponentObjectEmit)[]} emits
-     * @param {(ComponentArrayProp | ComponentObjectProp)[]} props
+     * @param {(ComponentArrayEmit | ComponentObjectEmit | ComponentTypeEmit)[]} emits
+     * @param {(ComponentArrayProp | ComponentObjectProp | ComponentTypeProp)[]} props
      * @param {Literal} nameLiteralNode
-     * @param {ObjectExpression} vueObjectNode
+     * @param {ObjectExpression | Program} vueDefineNode
      */
-    function verifyEmit(emits, props, nameLiteralNode, vueObjectNode) {
+    function verifyEmit(emits, props, nameLiteralNode, vueDefineNode) {
       const name = `${nameLiteralNode.value}`
       if (emits.some((e) => e.emitName === name)) {
         return
@@ -155,12 +158,98 @@ module.exports = {
         node: nameLiteralNode,
         messageId: 'missing',
         data: {
-          name
+          name,
+          emitsKind:
+            vueDefineNode.type === 'ObjectExpression'
+              ? '`emits` option'
+              : '`defineEmits`'
         },
-        suggest: buildSuggest(vueObjectNode, emits, nameLiteralNode, context)
+        suggest: buildSuggest(vueDefineNode, emits, nameLiteralNode, context)
       })
     }
 
+    const programNode = context.getSourceCode().ast
+    if (utils.isScriptSetup(context)) {
+      // init
+      vueTemplateDefineData = {
+        type: 'setup',
+        define: programNode,
+        emits: [],
+        props: []
+      }
+    }
+
+    const callVisitor = {
+      /**
+       * @param {CallExpression & { arguments: [Literal, ...Expression] }} node
+       * @param {VueObjectData} [info]
+       */
+      'CallExpression[arguments.0.type=Literal]'(node, info) {
+        const callee = utils.skipChainExpression(node.callee)
+        const nameLiteralNode = node.arguments[0]
+        if (!nameLiteralNode || typeof nameLiteralNode.value !== 'string') {
+          // cannot check
+          return
+        }
+        const vueDefineNode = info ? info.node : programNode
+        const emitsDeclarations = vueEmitsDeclarations.get(vueDefineNode)
+        if (!emitsDeclarations) {
+          return
+        }
+
+        let emit
+        if (callee.type === 'MemberExpression') {
+          const name = utils.getStaticPropertyName(callee)
+          if (name === 'emit' || name === '$emit') {
+            emit = { name, member: callee }
+          }
+        }
+
+        // verify setup context
+        const setupContext = setupContexts.get(vueDefineNode)
+        if (setupContext) {
+          const { contextReferenceIds, emitReferenceIds } = setupContext
+          if (callee.type === 'Identifier' && emitReferenceIds.has(callee)) {
+            // verify setup(props,{emit}) {emit()}
+            verifyEmit(
+              emitsDeclarations,
+              vuePropsDeclarations.get(vueDefineNode) || [],
+              nameLiteralNode,
+              vueDefineNode
+            )
+          } else if (emit && emit.name === 'emit') {
+            const memObject = utils.skipChainExpression(emit.member.object)
+            if (
+              memObject.type === 'Identifier' &&
+              contextReferenceIds.has(memObject)
+            ) {
+              // verify setup(props,context) {context.emit()}
+              verifyEmit(
+                emitsDeclarations,
+                vuePropsDeclarations.get(vueDefineNode) || [],
+                nameLiteralNode,
+                vueDefineNode
+              )
+            }
+          }
+        }
+
+        // verify $emit
+        if (emit && emit.name === '$emit') {
+          const memObject = utils.skipChainExpression(emit.member.object)
+          if (utils.isThis(memObject, context)) {
+            // verify this.$emit()
+            verifyEmit(
+              emitsDeclarations,
+              vuePropsDeclarations.get(vueDefineNode) || [],
+              nameLiteralNode,
+              vueDefineNode
+            )
+          }
+        }
+      }
+    }
+
     return utils.defineTemplateBodyVisitor(
       context,
       {
@@ -172,54 +261,41 @@ module.exports = {
             // cannot check
             return
           }
-          if (!vueTemplateObjectData) {
+          if (!vueTemplateDefineData) {
             return
           }
           if (callee.type === 'Identifier' && callee.name === '$emit') {
             verifyEmit(
-              vueTemplateObjectData.emits,
-              vueTemplateObjectData.props,
+              vueTemplateDefineData.emits,
+              vueTemplateDefineData.props,
               nameLiteralNode,
-              vueTemplateObjectData.object
+              vueTemplateDefineData.define
             )
           }
         }
       },
-      utils.defineVueVisitor(context, {
-        onVueObjectEnter(node) {
-          vueEmitsDeclarations.set(node, utils.getComponentEmits(node))
-          if (allowProps) {
-            vuePropsDeclarations.set(node, utils.getComponentProps(node))
-          }
-        },
-        onSetupFunctionEnter(node, { node: vueNode }) {
-          const contextParam = node.params[1]
-          if (!contextParam) {
-            // no arguments
-            return
-          }
-          if (contextParam.type === 'RestElement') {
-            // cannot check
-            return
-          }
-          if (contextParam.type === 'ArrayPattern') {
-            // cannot check
-            return
-          }
-          /** @type {Set<Identifier>} */
-          const contextReferenceIds = new Set()
-          /** @type {Set<Identifier>} */
-          const emitReferenceIds = new Set()
-          if (contextParam.type === 'ObjectPattern') {
-            const emitProperty = utils.findAssignmentProperty(
-              contextParam,
-              'emit'
-            )
-            if (!emitProperty) {
+      utils.compositingVisitors(
+        utils.defineScriptSetupVisitor(context, {
+          onDefineEmitsEnter(node, emits) {
+            vueEmitsDeclarations.set(programNode, emits)
+
+            if (
+              vueTemplateDefineData &&
+              vueTemplateDefineData.type === 'setup'
+            ) {
+              vueTemplateDefineData.emits = emits
+              vueTemplateDefineData.defineEmits = node
+            }
+
+            if (
+              !node.parent ||
+              node.parent.type !== 'VariableDeclarator' ||
+              node.parent.init !== node
+            ) {
               return
             }
-            const emitParam = emitProperty.value
-            // `setup(props, {emit})`
+
+            const emitParam = node.parent.id
             const variable =
               emitParam.type === 'Identifier'
                 ? findVariable(context.getScope(), emitParam)
@@ -227,6 +303,8 @@ module.exports = {
             if (!variable) {
               return
             }
+            /** @type {Set<Identifier>} */
+            const emitReferenceIds = new Set()
             for (const reference of variable.references) {
               if (!reference.isRead()) {
                 continue
@@ -234,150 +312,170 @@ module.exports = {
 
               emitReferenceIds.add(reference.identifier)
             }
-          } else if (contextParam.type === 'Identifier') {
-            // `setup(props, context)`
-            const variable = findVariable(context.getScope(), contextParam)
-            if (!variable) {
+            setupContexts.set(programNode, {
+              contextReferenceIds: new Set(),
+              emitReferenceIds
+            })
+          },
+          onDefinePropsEnter(_node, props) {
+            if (allowProps) {
+              vuePropsDeclarations.set(programNode, props)
+
+              if (
+                vueTemplateDefineData &&
+                vueTemplateDefineData.type === 'setup'
+              ) {
+                vueTemplateDefineData.props = props
+              }
+            }
+          },
+          ...callVisitor
+        }),
+        utils.defineVueVisitor(context, {
+          onVueObjectEnter(node) {
+            vueEmitsDeclarations.set(node, utils.getComponentEmits(node))
+            if (allowProps) {
+              vuePropsDeclarations.set(node, utils.getComponentProps(node))
+            }
+          },
+          onSetupFunctionEnter(node, { node: vueNode }) {
+            const contextParam = node.params[1]
+            if (!contextParam) {
+              // no arguments
               return
             }
-            for (const reference of variable.references) {
-              if (!reference.isRead()) {
-                continue
-              }
-
-              contextReferenceIds.add(reference.identifier)
+            if (contextParam.type === 'RestElement') {
+              // cannot check
+              return
             }
-          }
-          setupContexts.set(vueNode, {
-            contextReferenceIds,
-            emitReferenceIds
-          })
-        },
-        /**
-         * @param {CallExpression & { arguments: [Literal, ...Expression] }} node
-         * @param {VueObjectData} data
-         */
-        'CallExpression[arguments.0.type=Literal]'(node, { node: vueNode }) {
-          const callee = utils.skipChainExpression(node.callee)
-          const nameLiteralNode = node.arguments[0]
-          if (!nameLiteralNode || typeof nameLiteralNode.value !== 'string') {
-            // cannot check
-            return
-          }
-          const emitsDeclarations = vueEmitsDeclarations.get(vueNode)
-          if (!emitsDeclarations) {
-            return
-          }
-
-          let emit
-          if (callee.type === 'MemberExpression') {
-            const name = utils.getStaticPropertyName(callee)
-            if (name === 'emit' || name === '$emit') {
-              emit = { name, member: callee }
+            if (contextParam.type === 'ArrayPattern') {
+              // cannot check
+              return
             }
-          }
-
-          // verify setup context
-          const setupContext = setupContexts.get(vueNode)
-          if (setupContext) {
-            const { contextReferenceIds, emitReferenceIds } = setupContext
-            if (callee.type === 'Identifier' && emitReferenceIds.has(callee)) {
-              // verify setup(props,{emit}) {emit()}
-              verifyEmit(
-                emitsDeclarations,
-                vuePropsDeclarations.get(vueNode) || [],
-                nameLiteralNode,
-                vueNode
+            /** @type {Set<Identifier>} */
+            const contextReferenceIds = new Set()
+            /** @type {Set<Identifier>} */
+            const emitReferenceIds = new Set()
+            if (contextParam.type === 'ObjectPattern') {
+              const emitProperty = utils.findAssignmentProperty(
+                contextParam,
+                'emit'
               )
-            } else if (emit && emit.name === 'emit') {
-              const memObject = utils.skipChainExpression(emit.member.object)
-              if (
-                memObject.type === 'Identifier' &&
-                contextReferenceIds.has(memObject)
-              ) {
-                // verify setup(props,context) {context.emit()}
-                verifyEmit(
-                  emitsDeclarations,
-                  vuePropsDeclarations.get(vueNode) || [],
-                  nameLiteralNode,
-                  vueNode
-                )
+              if (!emitProperty) {
+                return
               }
-            }
-          }
+              const emitParam = emitProperty.value
+              // `setup(props, {emit})`
+              const variable =
+                emitParam.type === 'Identifier'
+                  ? findVariable(context.getScope(), emitParam)
+                  : null
+              if (!variable) {
+                return
+              }
+              for (const reference of variable.references) {
+                if (!reference.isRead()) {
+                  continue
+                }
 
-          // verify $emit
-          if (emit && emit.name === '$emit') {
-            const memObject = utils.skipChainExpression(emit.member.object)
-            if (utils.isThis(memObject, context)) {
-              // verify this.$emit()
-              verifyEmit(
-                emitsDeclarations,
-                vuePropsDeclarations.get(vueNode) || [],
-                nameLiteralNode,
-                vueNode
-              )
+                emitReferenceIds.add(reference.identifier)
+              }
+            } else if (contextParam.type === 'Identifier') {
+              // `setup(props, context)`
+              const variable = findVariable(context.getScope(), contextParam)
+              if (!variable) {
+                return
+              }
+              for (const reference of variable.references) {
+                if (!reference.isRead()) {
+                  continue
+                }
+
+                contextReferenceIds.add(reference.identifier)
+              }
             }
-          }
-        },
-        onVueObjectExit(node, { type }) {
-          const emits = vueEmitsDeclarations.get(node)
-          if (
-            !vueTemplateObjectData ||
-            vueTemplateObjectData.type !== 'export'
-          ) {
+            setupContexts.set(vueNode, {
+              contextReferenceIds,
+              emitReferenceIds
+            })
+          },
+          ...callVisitor,
+          onVueObjectExit(node, { type }) {
+            const emits = vueEmitsDeclarations.get(node)
             if (
-              emits &&
-              (type === 'mark' || type === 'export' || type === 'definition')
+              !vueTemplateDefineData ||
+              (vueTemplateDefineData.type !== 'export' &&
+                vueTemplateDefineData.type !== 'setup')
             ) {
-              vueTemplateObjectData = {
-                type,
-                object: node,
-                emits,
-                props: vuePropsDeclarations.get(node) || []
+              if (
+                emits &&
+                (type === 'mark' || type === 'export' || type === 'definition')
+              ) {
+                vueTemplateDefineData = {
+                  type,
+                  define: node,
+                  emits,
+                  props: vuePropsDeclarations.get(node) || []
+                }
               }
             }
+            setupContexts.delete(node)
+            vueEmitsDeclarations.delete(node)
+            vuePropsDeclarations.delete(node)
           }
-          setupContexts.delete(node)
-          vueEmitsDeclarations.delete(node)
-          vuePropsDeclarations.delete(node)
-        }
-      })
+        })
+      )
     )
   }
 }
 
 /**
- * @param {ObjectExpression} object
- * @param {(ComponentArrayEmit | ComponentObjectEmit)[]} emits
+ * @param {ObjectExpression|Program} define
+ * @param {(ComponentArrayEmit | ComponentObjectEmit | ComponentTypeEmit)[]} emits
  * @param {Literal} nameNode
  * @param {RuleContext} context
  * @returns {Rule.SuggestionReportDescriptor[]}
  */
-function buildSuggest(object, emits, nameNode, context) {
+function buildSuggest(define, emits, nameNode, context) {
+  const emitsKind =
+    define.type === 'ObjectExpression' ? '`emits` option' : '`defineEmits`'
   const certainEmits = emits.filter((e) => e.key)
   if (certainEmits.length) {
     const last = certainEmits[certainEmits.length - 1]
     return [
       {
         messageId: 'addOneOption',
-        data: { name: `${nameNode.value}` },
+        data: {
+          name: `${nameNode.value}`,
+          emitsKind
+        },
         fix(fixer) {
-          if (last.value === null) {
+          if (last.type === 'array') {
             // Array
             return fixer.insertTextAfter(last.node, `, '${nameNode.value}'`)
-          } else {
+          } else if (last.type === 'object') {
             // Object
             return fixer.insertTextAfter(
               last.node,
               `, '${nameNode.value}': null`
             )
+          } else {
+            // type
+            // The argument is unknown and cannot be suggested.
+            return null
           }
         }
       }
     ]
   }
 
+  if (define.type !== 'ObjectExpression') {
+    // We don't know where to put defineEmits.
+    return []
+  }
+
+  const object = define
+
   const propertyNodes = object.properties.filter(utils.isProperty)
 
   const emitsOption = propertyNodes.find(
@@ -393,7 +491,7 @@ function buildSuggest(object, emits, nameNode, context) {
       return [
         {
           messageId: 'addOneOption',
-          data: { name: `${nameNode.value}` },
+          data: { name: `${nameNode.value}`, emitsKind },
           fix(fixer) {
             return fixer.insertTextAfter(
               leftBracket,
@@ -411,7 +509,7 @@ function buildSuggest(object, emits, nameNode, context) {
       return [
         {
           messageId: 'addOneOption',
-          data: { name: `${nameNode.value}` },
+          data: { name: `${nameNode.value}`, emitsKind },
           fix(fixer) {
             return fixer.insertTextAfter(
               leftBrace,
@@ -433,7 +531,7 @@ function buildSuggest(object, emits, nameNode, context) {
   return [
     {
       messageId: 'addArrayEmitsOption',
-      data: { name: `${nameNode.value}` },
+      data: { name: `${nameNode.value}`, emitsKind },
       fix(fixer) {
         if (afterOptionNode) {
           return fixer.insertTextAfter(
@@ -468,7 +566,7 @@ function buildSuggest(object, emits, nameNode, context) {
     },
     {
       messageId: 'addObjectEmitsOption',
-      data: { name: `${nameNode.value}` },
+      data: { name: `${nameNode.value}`, emitsKind },
       fix(fixer) {
         if (afterOptionNode) {
           return fixer.insertTextAfter(
diff --git a/tests/lib/rules/require-explicit-emits.js b/tests/lib/rules/require-explicit-emits.js
index 6cf1cc6eb..a1682028b 100644
--- a/tests/lib/rules/require-explicit-emits.js
+++ b/tests/lib/rules/require-explicit-emits.js
@@ -394,6 +394,69 @@ tester.run('require-explicit-emits', rule, {
       </script>
       `,
       options: [{ allowProps: true }]
+    },
+
+    // <script setup>
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('foo')"/>
+      </template>
+      <script setup>
+      defineEmits(['foo'])
+      </script>
+      `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('foo')"/>
+      </template>
+      <script setup>
+      defineEmits({foo:null})
+      </script>
+      `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('foo')"/>
+      </template>
+      <script setup lang="ts">
+      defineEmits<{
+        (e: 'foo'): void
+      }>()
+      </script>
+      `,
+      parserOptions: { parser: require.resolve('@typescript-eslint/parser') }
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('foo')"/>
+      </template>
+      <script setup lang="ts">
+      defineEmits<(e: 'foo') => void>()
+      </script>
+      `,
+      parserOptions: { parser: require.resolve('@typescript-eslint/parser') }
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('foo')"/>
+        <div @click="$emit('bar')"/>
+      </template>
+      <script setup lang="ts">
+      defineEmits<(e: 'foo' | 'bar') => void>()
+      </script>
+      `,
+      parserOptions: { parser: require.resolve('@typescript-eslint/parser') }
     }
   ],
   invalid: [
@@ -1607,6 +1670,127 @@ emits: {'foo': null}
           messageId: 'missing'
         }
       ]
+    },
+
+    // <script setup>
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('bar')"/>
+      </template>
+      <script setup>
+      defineEmits(['foo'])
+      </script>
+      `,
+      errors: [
+        {
+          message:
+            'The "bar" event has been triggered but not declared on `defineEmits`.',
+          line: 3,
+          suggestions: [
+            {
+              desc: 'Add the "bar" to `defineEmits`.',
+              output: `
+      <template>
+        <div @click="$emit('bar')"/>
+      </template>
+      <script setup>
+      defineEmits(['foo', 'bar'])
+      </script>
+      `
+            }
+          ]
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('bar')"/>
+      </template>
+      <script setup>
+      defineEmits({foo:null})
+      </script>
+      `,
+      errors: [
+        {
+          message:
+            'The "bar" event has been triggered but not declared on `defineEmits`.',
+          line: 3,
+          suggestions: [
+            {
+              desc: 'Add the "bar" to `defineEmits`.',
+              output: `
+      <template>
+        <div @click="$emit('bar')"/>
+      </template>
+      <script setup>
+      defineEmits({foo:null, 'bar': null})
+      </script>
+      `
+            }
+          ]
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('bar')"/>
+      </template>
+      <script setup lang="ts">
+      defineEmits<{
+        (e: 'foo'): void
+      }>()
+      </script>
+      `,
+      parserOptions: { parser: require.resolve('@typescript-eslint/parser') },
+      errors: [
+        {
+          message:
+            'The "bar" event has been triggered but not declared on `defineEmits`.',
+          line: 3
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('bar')"/>
+      </template>
+      <script setup lang="ts">
+      defineEmits<(e: 'foo') => void>()
+      </script>
+      `,
+      parserOptions: { parser: require.resolve('@typescript-eslint/parser') },
+      errors: [
+        {
+          message:
+            'The "bar" event has been triggered but not declared on `defineEmits`.',
+          line: 3
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <div @click="$emit('foo')"/>
+      </template>
+      <script setup>
+      </script>
+      `,
+      errors: [
+        {
+          message:
+            'The "foo" event has been triggered but not declared on `defineEmits`.',
+          line: 3
+        }
+      ]
     }
   ]
 })

From 1a63f8da98375d1adf9bfefe36b0156928dd7017 Mon Sep 17 00:00:00 2001
From: yosuke ota <otameshiyo23@gmail.com>
Date: Sat, 3 Jul 2021 22:50:50 +0900
Subject: [PATCH 2/2] add test

---
 tests/lib/rules/require-explicit-emits.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/tests/lib/rules/require-explicit-emits.js b/tests/lib/rules/require-explicit-emits.js
index a1682028b..1ea1758d2 100644
--- a/tests/lib/rules/require-explicit-emits.js
+++ b/tests/lib/rules/require-explicit-emits.js
@@ -1791,6 +1791,24 @@ emits: {'foo': null}
           line: 3
         }
       ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+      <script setup lang="ts">
+      const emit = defineEmits<(e: 'foo') => void>()
+      emit('foo');
+      emit('bar')
+      </script>
+      `,
+      parserOptions: { parser: require.resolve('@typescript-eslint/parser') },
+      errors: [
+        {
+          message:
+            'The "bar" event has been triggered but not declared on `defineEmits`.',
+          line: 5
+        }
+      ]
     }
   ]
 })