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test: test undefined for util #22741

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test: test undefined for util #22741

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test: test undefined in util
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@ZYSzys
ZYSzys committed Sep 7, 2018
commit d3e5603314631ed9908b3a2aefa2d7e34fed1e10
3 changes: 3 additions & 0 deletions test/parallel/test-util.js
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Original file line number Diff line number Diff line change
Expand Up @@ -113,14 +113,17 @@ assert.strictEqual(util.isBoolean(false), true);
assert.strictEqual(util.isBoolean('string'), false);

assert.strictEqual(util.isNull(null), true);
assert.strictEqual(util.isNull(undefined), false);
assert.strictEqual(util.isNull(), false);
assert.strictEqual(util.isNull('string'), false);

assert.strictEqual(util.isUndefined(undefined), true);
assert.strictEqual(util.isUndefined(), true);
assert.strictEqual(util.isUndefined(null), false);
assert.strictEqual(util.isUndefined('string'), false);

assert.strictEqual(util.isNullOrUndefined(null), true);
assert.strictEqual(util.isNullOrUndefined(undefined), true);
assert.strictEqual(util.isNullOrUndefined(), true);
assert.strictEqual(util.isNullOrUndefined('string'), false);

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