78 lines
1.7 KiB
JavaScript
78 lines
1.7 KiB
JavaScript
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'use strict';
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const { mustCall } = require('../common');
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const { deepStrictEqual, ok, strictEqual } = require('assert');
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const { channel } = require('diagnostics_channel');
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const {
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hijackStdout,
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hijackStderr,
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restoreStdout,
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restoreStderr
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} = require('../common/hijackstdio');
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const stdoutMethods = [
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'log',
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'info',
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'debug',
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];
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const stderrMethods = [
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'warn',
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'error',
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];
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const methods = [
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...stdoutMethods,
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...stderrMethods,
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];
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const channels = {
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log: channel('console.log'),
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info: channel('console.info'),
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debug: channel('console.debug'),
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warn: channel('console.warn'),
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error: channel('console.error')
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};
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process.stdout.isTTY = false;
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process.stderr.isTTY = false;
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for (const method of methods) {
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let intercepted = false;
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let formatted = false;
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const isStdout = stdoutMethods.includes(method);
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const hijack = isStdout ? hijackStdout : hijackStderr;
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const restore = isStdout ? restoreStdout : restoreStderr;
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const foo = 'string';
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const bar = { key: /value/ };
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const baz = [ 1, 2, 3 ];
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channels[method].subscribe(mustCall((args) => {
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// Should not have been formatted yet.
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intercepted = true;
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ok(!formatted);
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// Should receive expected log message args.
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deepStrictEqual(args, [foo, bar, baz]);
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// Should be able to mutate message args and have it reflected in output.
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bar.added = true;
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}));
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hijack(mustCall((output) => {
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// Should have already been intercepted.
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formatted = true;
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ok(intercepted);
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// Should produce expected formatted output with mutated message args.
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strictEqual(output, 'string { key: /value/, added: true } [ 1, 2, 3 ]\n');
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}));
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console[method](foo, bar, baz);
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restore();
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}
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