format string tests

Author: lunaruan

packages/react-devtools-shared/src/__tests__/utils-test.js

@@ -189,5 +189,26 @@ describe('utils', () => {
       ]);
       expect(formatWithStyles(['%%c%c'], 'color: gray')).toEqual(['%%c%c']);
     });
+
+    it('should format non string inputs as the first argument', () => {
+      expect(formatWithStyles([{foo: 'bar'}])).toEqual([{foo: 'bar'}]);
+      expect(formatWithStyles([[1, 2, 3]])).toEqual([[1, 2, 3]]);
+      expect(formatWithStyles([{foo: 'bar'}], 'color: gray')).toEqual([
+        '%c%o',
+        'color: gray',
+        {foo: 'bar'},
+      ]);
+      expect(formatWithStyles([[1, 2, 3]], 'color: gray')).toEqual([
+        '%c%o',
+        'color: gray',
+        [1, 2, 3],
+      ]);
+      expect(formatWithStyles([{foo: 'bar'}, 'hi'], 'color: gray')).toEqual([
+        '%c%o %s',
+        'color: gray',
+        {foo: 'bar'},
+        'hi',
+      ]);
+    });
   });
 });

packages/react-devtools-shared/src/backend/utils.js

@@ -181,17 +181,16 @@ export function formatWithStyles(
     inputArgs === undefined ||
     inputArgs === null ||
     inputArgs.length === 0 ||
-    typeof inputArgs[0] !== 'string' ||
     // Matches any of %c but not %%c
-    inputArgs[0].match(/([^%]|^)(%c)/g) ||
+    (typeof inputArgs[0] === 'string' && inputArgs[0].match(/([^%]|^)(%c)/g)) ||
     style === undefined
   ) {
     return inputArgs;
   }
 
   // Matches any of %(o|O|d|i|s|f), but not %%(o|O|d|i|s|f)
   const REGEXP = /([^%]|^)((%%)*)(%([oOdisf]))/g;
-  if (inputArgs[0].match(REGEXP)) {
+  if (typeof inputArgs[0] === 'string' && inputArgs[0].match(REGEXP)) {
     return [`%c${inputArgs[0]}`, style, ...inputArgs.slice(1)];
   } else {
     const firstArg = inputArgs.reduce((formatStr, elem, i) => {

packages/react-devtools-shared/src/hook.js

@@ -180,17 +180,17 @@ export function installHook(target: any): DevToolsHook | null {
       inputArgs === undefined ||
       inputArgs === null ||
       inputArgs.length === 0 ||
-      typeof inputArgs[0] !== 'string' ||
       // Matches any of %c but not %%c
-      inputArgs[0].match(/([^%]|^)(%c)/g) ||
+      (typeof inputArgs[0] === 'string' &&
+        inputArgs[0].match(/([^%]|^)(%c)/g)) ||
       style === undefined
     ) {
       return inputArgs;
     }
 
     // Matches any of %(o|O|d|i|s|f), but not %%(o|O|d|i|s|f)
     const REGEXP = /([^%]|^)((%%)*)(%([oOdisf]))/g;
-    if (inputArgs[0].match(REGEXP)) {
+    if (typeof inputArgs[0] === 'string' && inputArgs[0].match(REGEXP)) {
       return [`%c${inputArgs[0]}`, style, ...inputArgs.slice(1)];
     } else {
       const firstArg = inputArgs.reduce((formatStr, elem, i) => {