Fix: [no-duplicate-imports] Treat namespace imports as different (fixes

eslint#12758)

lib/rules/no-duplicate-imports.js

@@ -21,6 +21,20 @@ function getValue(node) {
     return "";
 }
 
+/**
+ * Checks if the import's type is a namespace import.
+ * @param {ASTNode} node A node to get.
+ *
+ * @returns {boolean} Whether or not the import's type is "ImportNamespaceSpecifier".
+ */
+function isNamespaceImport(node) {
+    return (
+        node.specifiers &&
+        node.specifiers[0] &&
+        node.specifiers[0].type === "ImportNamespaceSpecifier"
+    );
+}
+
 /**
  * Checks if the name of the import or export exists in the given array, and reports if so.
  * @param {RuleContext} context The ESLint rule context object.
@@ -61,7 +75,7 @@ function handleImports(context, includeExports, importsInFile, exportsInFile) {
     return function(node) {
         const value = getValue(node);
 
-        if (value) {
+        if (value && !isNamespaceImport(node)) {
             checkAndReport(context, node, value, importsInFile, "import");
 
             if (includeExports) {