From 2cfe7ea73450c5ac799f1c3fb264fac12d8f9c52 Mon Sep 17 00:00:00 2001
From: Agyei Holy <agyeiholy978@gmail.com>
Date: Tue, 5 May 2026 16:28:17 -0500
Subject: [PATCH] Fix bracket-notation handling in no-printing-tojson rule

---
 .../rules/no-printing-tojson.js               | 47 +++++++++++-----
 .../tests/no-printing-tojson.test.mjs         | 53 +++++++++++++++++++
 2 files changed, 88 insertions(+), 12 deletions(-)
 create mode 100644 buildscripts/eslint-plugin-mongodb/tests/no-printing-tojson.test.mjs

diff --git a/buildscripts/eslint-plugin-mongodb/rules/no-printing-tojson.js b/buildscripts/eslint-plugin-mongodb/rules/no-printing-tojson.js
index 0753877985519..7caf9ca38800f 100644
--- a/buildscripts/eslint-plugin-mongodb/rules/no-printing-tojson.js
+++ b/buildscripts/eslint-plugin-mongodb/rules/no-printing-tojson.js
@@ -1,4 +1,4 @@
-const print_fns = [
+const printFunctions = [
     "jsTestLog",
     "jsTest.log",
     "jsTest.log.info",
@@ -8,14 +8,39 @@ const print_fns = [
     "print",
 ];
 
-function flattenMemberExpressionName(expr) {
-    if (expr.object.type == "MemberExpression") {
-        return flattenMemberExpressionName(expr.object) + "." + expr.property.name;
-    } else if (expr.object.type == "Identifier") {
-        return expr.object.name + "." + expr.property.name;
-    } else {
+function getPropertyName(expr) {
+    if (!expr.computed && expr.property.type == "Identifier") {
+        return expr.property.name;
+    }
+
+    if (expr.computed && expr.property.type == "Literal" && typeof expr.property.value == "string") {
+        return expr.property.value;
+    }
+
+    return "";
+}
+
+function flattenCallTargetName(expr) {
+    if (expr.type == "ChainExpression") {
+        return flattenCallTargetName(expr.expression);
+    }
+
+    if (expr.type == "Identifier") {
+        return expr.name;
+    }
+
+    if (expr.type != "MemberExpression") {
         return "";
     }
+
+    const objectName = flattenCallTargetName(expr.object);
+    const propertyName = getPropertyName(expr);
+
+    if (!objectName || !propertyName) {
+        return "";
+    }
+
+    return `${objectName}.${propertyName}`;
 }
 
 export default {
@@ -30,11 +55,9 @@ export default {
     create(context) {
         return {
             CallExpression: function (node) {
-                if (node.callee.type == "MemberExpression") {
-                    node.callee.name = flattenMemberExpressionName(node.callee);
-                } else if (node.callee.type != "Identifier") return;
+                const calleeName = flattenCallTargetName(node.callee);
 
-                if (print_fns.every((name) => name != node.callee.name)) return;
+                if (printFunctions.every((name) => name != calleeName)) return;
 
                 node.arguments.forEach((arg) => {
                     if (arg.type != "CallExpression") return;
@@ -46,7 +69,7 @@ export default {
                     context.report({
                         node,
                         message: `Calling ${arg.callee.name}() as a parameter of ${
-                            node.callee.name
+                            calleeName
                         }(). Consider using toJsonForLog() instead or disable this rule by adding '// eslint-disable-next-line mongodb/no-printing-tojson'`,
                         fix(fixer) {
                             return fixer.replaceTextRange([arg.callee.start, arg.callee.end], "toJsonForLog");
diff --git a/buildscripts/eslint-plugin-mongodb/tests/no-printing-tojson.test.mjs b/buildscripts/eslint-plugin-mongodb/tests/no-printing-tojson.test.mjs
new file mode 100644
index 0000000000000..2b4b65ba4202e
--- /dev/null
+++ b/buildscripts/eslint-plugin-mongodb/tests/no-printing-tojson.test.mjs
@@ -0,0 +1,53 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import {Linter} from "eslint";
+
+import rule from "../rules/no-printing-tojson.js";
+
+const config = [
+    {
+        plugins: {
+            mongodb: {
+                rules: {
+                    "no-printing-tojson": rule,
+                },
+            },
+        },
+        rules: {
+            "mongodb/no-printing-tojson": "error",
+        },
+        languageOptions: {
+            ecmaVersion: 2022,
+        },
+    },
+];
+
+function verify(code) {
+    return new Linter().verify(code, config, "test.js");
+}
+
+function verifyAndFix(code) {
+    return new Linter().verifyAndFix(code, config, "test.js");
+}
+
+test("flags direct jsTest.log.info calls with tojson arguments", () => {
+    const messages = verify("jsTest.log.info(tojson(doc));");
+
+    assert.equal(messages.length, 1);
+    assert.match(messages[0].message, /jsTest\.log\.info\(\)/);
+});
+
+test("flags bracket-notation log helpers with tojson arguments", () => {
+    const messages = verify('jsTest["log"].info(tojson(doc));');
+
+    assert.equal(messages.length, 1);
+    assert.match(messages[0].message, /jsTest\.log\.info\(\)/);
+});
+
+test("autofixes bracket-notation log helpers to use toJsonForLog", () => {
+    const result = verifyAndFix('jsTest.log["info"](tojson(doc));');
+
+    assert.equal(result.fixed, true);
+    assert.equal(result.output, 'jsTest.log["info"](toJsonForLog(doc));');
+});