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test: improve internal/buffer.js test coverage #21061

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test: improve internal/buffer.js test coverage #21061

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2 changes: 1 addition & 1 deletion test/parallel/test-buffer-readint.js
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Original file line number Diff line number Diff line change
Expand Up @@ -160,7 +160,7 @@ const assert = require('assert');
});

// Test 1 to 6 bytes.
for (let i = 1; i < 6; i++) {
for (let i = 1; i <= 6; i++) {
['readIntBE', 'readIntLE'].forEach((fn) => {
['', '0', null, {}, [], () => {}, true, false, undefined].forEach((o) => {
assert.throws(
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2 changes: 1 addition & 1 deletion test/parallel/test-buffer-readuint.js
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Expand Up @@ -128,7 +128,7 @@ const assert = require('assert');
});

// Test 1 to 6 bytes.
for (let i = 1; i < 6; i++) {
for (let i = 1; i <= 6; i++) {
['readUIntBE', 'readUIntLE'].forEach((fn) => {
['', '0', null, {}, [], () => {}, true, false, undefined].forEach((o) => {
assert.throws(
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15 changes: 15 additions & 0 deletions test/parallel/test-buffer-writeint.js
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Expand Up @@ -162,6 +162,21 @@ const errorOutOfBounds = common.expectsError({
});
}

// Test 48 bit
{
const value = 0x1234567890ab;
const buffer = Buffer.allocUnsafe(6);
buffer.writeIntBE(value, 0, 6);
assert.ok(buffer.equals(new Uint8Array([
0x12, 0x34, 0x56, 0x78, 0x90, 0xab
])));

buffer.writeIntLE(value, 0, 6);
assert.ok(buffer.equals(new Uint8Array([
0xab, 0x90, 0x78, 0x56, 0x34, 0x12
])));
}

// Test Int
{
const data = Buffer.alloc(8);
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11 changes: 11 additions & 0 deletions test/parallel/test-buffer-writeuint.js
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Expand Up @@ -110,6 +110,17 @@ const assert = require('assert');
assert.ok(data.equals(new Uint8Array([0x6d, 0x6d, 0x6d, 0x0a, 0xf9, 0xe7])));
}

// Test 48 bit
{
const value = 0x1234567890ab;
const data = Buffer.allocUnsafe(6);
data.writeUIntBE(value, 0, 6);
assert.ok(data.equals(new Uint8Array([0x12, 0x34, 0x56, 0x78, 0x90, 0xab])));

data.writeUIntLE(value, 0, 6);
assert.ok(data.equals(new Uint8Array([0xab, 0x90, 0x78, 0x56, 0x34, 0x12])));
}

// Test UInt
{
const data = Buffer.alloc(8);
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