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test: increase coverage for trace_events.js

Add a test case to increase the test coverage for lib/trace_events.js.

Refs: https://codecov.io/gh/nodejs/node/src/ea7a6f9dbd05654fff3f8c474ac0f5126bc87376/lib/trace_events.js#L70...75

PR-URL: #30705
Refs: https://coverage.nodejs.org/coverage-ea7a6f9dbd05654f/lib/trace_events.js.html#L70
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
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Trott authored and MylesBorins committed Nov 28, 2019
1 parent a715c25 commit e624bb529d887e977e50dd898ebff9ecd561989a
Showing with 7 additions and 2 deletions.
  1. +7 −2 test/parallel/test-util-inspect.js
@@ -2511,8 +2511,13 @@ assert.strictEqual(
// Tracing class respects inspect depth.
try {
const trace = require('trace_events').createTracing({ categories: ['fo'] });
const actual = util.inspect({ trace }, { depth: 0 });
assert.strictEqual(actual, '{ trace: [Tracing] }');
const actualDepth0 = util.inspect({ trace }, { depth: 0 });
assert.strictEqual(actualDepth0, '{ trace: [Tracing] }');
const actualDepth1 = util.inspect({ trace }, { depth: 1 });
assert.strictEqual(
actualDepth1,
"{ trace: Tracing { enabled: false, categories: 'fo' } }"
);
} catch (err) {
if (err.code !== 'ERR_TRACE_EVENTS_UNAVAILABLE')
throw err;

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