Use attributes instead of deprecated assertions (#15758)

Co-authored-by: SUZUKI Sosuke <aosukeke@gmail.com>

src/language-js/print/module.js

@@ -254,7 +254,7 @@ function shouldPrintAttributes(node, options) {
     return false;
   }
 
-  if (isNonEmptyArray(node.attributes) || isNonEmptyArray(node.assertions)) {
+  if (isNonEmptyArray(node.attributes)) {
     return true;
   }
 
@@ -296,24 +296,16 @@ function getTextWithoutComments(options, start, end) {
   return text;
 }
 
-function getImportAttributesOrAssertionsKeyword(node, options) {
-  if (
-    // Babel parser add this property to indicate the keyword is `assert`
-    node.extra?.deprecatedAssertSyntax ||
-    (isNonEmptyArray(node.assertions) && !isNonEmptyArray(node.attributes))
-  ) {
+function getImportAttributesKeyword(node, options) {
+  // Babel parser add this property to indicate the keyword is `assert`
+  if (node.extra?.deprecatedAssertSyntax) {
     return "assert";
   }
 
-  if (!isNonEmptyArray(node.assertions) && isNonEmptyArray(node.attributes)) {
-    return "with";
-  }
-
-  const firstAttribute = node.attributes?.[0] ?? node.assertions?.[0];
   const textBetweenSourceAndAttributes = getTextWithoutComments(
     options,
     locEnd(node.source),
-    firstAttribute ? locStart(firstAttribute) : locEnd(node),
+    node.attributes?.[0] ? locStart(node.attributes[0]) : locEnd(node),
   );
 
   if (textBetweenSourceAndAttributes.trimStart().startsWith("assert")) {
@@ -323,10 +315,6 @@ function getImportAttributesOrAssertionsKeyword(node, options) {
   return "with";
 }
 
-/**
- * Print Import Attributes syntax.
- * If old ImportAssertions syntax is used, print them here.
- */
 function printImportAttributes(path, options, print) {
   const { node } = path;
 
@@ -334,21 +322,16 @@ function printImportAttributes(path, options, print) {
     return "";
   }
 
-  const keyword = getImportAttributesOrAssertionsKeyword(node, options);
+  const keyword = getImportAttributesKeyword(node, options);
   /** @type{Doc[]} */
   const parts = [` ${keyword} {`];
 
-  const property = isNonEmptyArray(node.attributes)
-    ? "attributes"
-    : isNonEmptyArray(node.assertions)
-      ? "assertions"
-      : undefined;
-  if (property) {
+  if (isNonEmptyArray(node.attributes)) {
     if (options.bracketSpacing) {
       parts.push(" ");
     }
 
-    parts.push(join(", ", path.map(print, property)));
+    parts.push(join(", ", path.map(print, "attributes")));
 
     if (options.bracketSpacing) {
       parts.push(" ");

src/language-js/traverse/visitor-keys.evaluate.js

@@ -61,6 +61,11 @@ const excludeKeys = {
   // Flow parser changed `.types` to `.elementTypes` https://github.com/facebook/flow/commit/5b60e6a81dc277dfab2e88fa3737a4dc9aafdcab
   // TupleTypeAnnotation: ["types"],
   PropertyDefinition: ["tsModifiers"],
+
+  // Legacy property
+  ExportAllDeclaration: ["assertions"],
+  ExportNamedDeclaration: ["assertions"],
+  ImportDeclaration: ["assertions"],
 };
 
 const visitorKeys = Object.fromEntries(

tests/unit/__snapshots__/visitor-keys.js.snap

@@ -273,7 +273,6 @@ exports[`visitor keys estree 1`] = `
   "ExportAllDeclaration": [
     "source",
     "attributes",
-    "assertions",
     "exported",
   ],
   "ExportDefaultDeclaration": [
@@ -287,7 +286,6 @@ exports[`visitor keys estree 1`] = `
     "specifiers",
     "source",
     "attributes",
-    "assertions",
   ],
   "ExportNamespaceSpecifier": [
     "exported",
@@ -366,7 +364,6 @@ exports[`visitor keys estree 1`] = `
     "specifiers",
     "source",
     "attributes",
-    "assertions",
   ],
   "ImportDefaultSpecifier": [
     "local",