util: improve empty typed array inspection

They should be aligned with all other empty objects. Therefore the whitespace is removed and they got a fast path for that. PR-URL: #22284 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Gus Caplan <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Minwoo Jung <[email protected]>
nodejs · Aug 19, 2018 · 9bfe4c7 · 9bfe4c7
1 parent a1c580f
commit 9bfe4c7
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diff --git a/lib/util.js b/lib/util.js
@@ -625,6 +625,8 @@ function formatValue(ctx, value, recurseTimes) {
       formatter = formatMap;
     } else if (isTypedArray(value)) {
       braces = [`${getPrefix(constructor, tag)}[`, ']'];
+      if (value.length === 0 && keyLength === 0 && !ctx.showHidden)
+        return `${braces[0]}]`;
       formatter = formatTypedArray;
     } else if (isMapIterator(value)) {
       braces = [`[${tag}] {`, '}'];

diff --git a/test/parallel/test-util-inspect.js b/test/parallel/test-util-inspect.js
@@ -79,7 +79,8 @@ assert.strictEqual(util.inspect({ 'a': { 'b': { 'c': 2 } } }, false, 1),
                    '{ a: { b: [Object] } }');
 assert.strictEqual(util.inspect({ 'a': { 'b': ['c'] } }, false, 1),
                    '{ a: { b: [Array] } }');
-assert.strictEqual(util.inspect(new Uint8Array(0)), 'Uint8Array [  ]');
+assert.strictEqual(util.inspect(new Uint8Array(0)), 'Uint8Array []');
+assert(inspect(new Uint8Array(0), { showHidden: true }).includes('[buffer]'));
 assert.strictEqual(
   util.inspect(
     Object.create(