From e3836910efdafd9edf04daed149c9e839c08047e Mon Sep 17 00:00:00 2001
From: Alexander T <alexander.tarasyuk@outlook.com>
Date: Sat, 30 May 2020 20:02:54 +0300
Subject: [PATCH] fix(eslint-plugin): [no-unused-expressions] ignore import
 expressions (#2130)

---
 packages/eslint-plugin/src/rules/no-unused-expressions.ts   | 3 ++-
 .../eslint-plugin/tests/rules/no-unused-expressions.test.ts | 6 ++++++
 packages/typescript-estree/src/ts-estree/ts-estree.ts       | 3 ++-
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/packages/eslint-plugin/src/rules/no-unused-expressions.ts b/packages/eslint-plugin/src/rules/no-unused-expressions.ts
index 9977f10c140..151b8611c24 100644
--- a/packages/eslint-plugin/src/rules/no-unused-expressions.ts
+++ b/packages/eslint-plugin/src/rules/no-unused-expressions.ts
@@ -26,7 +26,8 @@ export default util.createRule<Options, MessageIds>({
       ExpressionStatement(node): void {
         if (
           node.directive ||
-          node.expression.type === AST_NODE_TYPES.OptionalCallExpression
+          node.expression.type === AST_NODE_TYPES.OptionalCallExpression ||
+          node.expression.type === AST_NODE_TYPES.ImportExpression
         ) {
           return;
         }
diff --git a/packages/eslint-plugin/tests/rules/no-unused-expressions.test.ts b/packages/eslint-plugin/tests/rules/no-unused-expressions.test.ts
index a50d74f6b74..d1b782348d8 100644
--- a/packages/eslint-plugin/tests/rules/no-unused-expressions.test.ts
+++ b/packages/eslint-plugin/tests/rules/no-unused-expressions.test.ts
@@ -65,6 +65,12 @@ ruleTester.run('no-unused-expressions', rule, {
         return null;
       }
     `,
+    `
+      import('./foo');
+    `,
+    `
+      import('./foo').then(() => {});
+    `,
   ],
   invalid: [
     {
diff --git a/packages/typescript-estree/src/ts-estree/ts-estree.ts b/packages/typescript-estree/src/ts-estree/ts-estree.ts
index d57ce09d531..48ce05a6c29 100644
--- a/packages/typescript-estree/src/ts-estree/ts-estree.ts
+++ b/packages/typescript-estree/src/ts-estree/ts-estree.ts
@@ -359,7 +359,8 @@ export type Expression =
   | SpreadElement
   | TSAsExpression
   | TSUnaryExpression
-  | YieldExpression;
+  | YieldExpression
+  | ImportExpression;
 export type ExpressionWithTypeArguments =
   | TSClassImplements
   | TSInterfaceHeritage;