Walking a TypeScript AST and looking for an Identifier inside a CallExpression

identifier-inside-a-call-expression-example.ts

import { AbstractWalker } from 'tslint';
import { forEachChild, Node, SourceFile, SyntaxKind } from 'typescript';

class NoFDescribeOrFItWalker extends AbstractWalker {
    public walk (sourceFile: SourceFile) {
        const walkNode = (node: Node): void => {
            if (node.kind === SyntaxKind.CallExpression) {
                if (node.expression.kind === SyntaxKind.Identifier) {
                    // possible rule match!
                }
            }
            return forEachChild(node, walkNode);
        };
        return forEachChild(sourceFile, walkNode);
    }
}

🙏 Thanks you