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test: add TTY + assert test #26024

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test: add TTY + assert test #26024

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test: add assert test for position indicator 
This test adds coverage for a ternary in assertion_error.js that checks
if stderr is a TTY.
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@Trott
Trott committed Feb 10, 2019
commit 8d9d083d2cdc110bccc84536f66c4d941768a57b
18 changes: 18 additions & 0 deletions test/pseudo-tty/test-assert-position-indicator.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
'use strict';
require('../common');
const assert = require('assert');

process.env.NODE_DISABLE_COLORS = true;
process.stderr.columns = 20;

// Confirm that there is no position indicator.
assert.throws(
() => { assert.deepStrictEqual('a'.repeat(30), 'a'.repeat(31)); },
(err) => !err.message.includes('^')
);

// Confirm that there is a position indicator.
assert.throws(
() => { assert.deepStrictEqual('aaa', 'aaaa'); },
(err) => err.message.includes('^')
);
Empty file added test/pseudo-tty/test-assert-position-indicator.out
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