Implemented visitExternalModuleReference (#195)

Co-authored-by: Andrii Rodionov <[email protected]>

Author: arodionov

openrewrite/src/javascript/parser.ts

@@ -3393,7 +3393,20 @@ export class JavaScriptParserVisitor {
     }
 
     visitExternalModuleReference(node: ts.ExternalModuleReference) {
-        return this.visitUnknown(node);
+        return new J.MethodInvocation(
+            randomId(),
+            this.prefix(node),
+            Markers.EMPTY,
+            null,
+            null,
+            this.mapIdentifier(node, "require"),
+            new J.JContainer(
+                this.prefix(this.findChildNode(node, ts.SyntaxKind.OpenParenToken)!),
+                [this.rightPadded(this.visit(node.expression), this.suffix(node.expression))],
+                Markers.EMPTY
+            ),
+            this.mapMethodType(node)
+        )
     }
 
     visitJsxElement(node: ts.JsxElement) {

openrewrite/test/javascript/parser/import.test.ts

@@ -115,4 +115,13 @@ describe('import mapping', () => {
             `)
         );
     });
+
+    test('external module import', () => {
+        rewriteRun(
+            //language=typescript
+            typeScript(`
+                import mongodb = /*a*/require/*b*/(/*c*/'mongodb'/*d*/)/*e*/;
+            `)
+        );
+    });
 });