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111 lines
3.1 KiB
111 lines
3.1 KiB
'use strict';
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require('../common');
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const zlib = require('zlib');
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const assert = require('assert');
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// Work with and without `new` keyword
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assert.ok(zlib.Deflate() instanceof zlib.Deflate);
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assert.ok(new zlib.Deflate() instanceof zlib.Deflate);
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assert.ok(zlib.DeflateRaw() instanceof zlib.DeflateRaw);
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assert.ok(new zlib.DeflateRaw() instanceof zlib.DeflateRaw);
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// Throws if `opts.chunkSize` is invalid
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assert.throws(
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() => { new zlib.Deflate({chunkSize: -Infinity}); },
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/^RangeError: Invalid chunk size: -Infinity$/
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);
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// Confirm that maximum chunk size cannot be exceeded because it is `Infinity`.
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assert.strictEqual(zlib.constants.Z_MAX_CHUNK, Infinity);
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// Throws if `opts.windowBits` is invalid
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assert.throws(
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() => { new zlib.Deflate({windowBits: -Infinity}); },
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/^RangeError: Invalid windowBits: -Infinity$/
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);
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assert.throws(
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() => { new zlib.Deflate({windowBits: Infinity}); },
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/^RangeError: Invalid windowBits: Infinity$/
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);
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// Throws if `opts.level` is invalid
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assert.throws(
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() => { new zlib.Deflate({level: -Infinity}); },
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/^RangeError: Invalid compression level: -Infinity$/
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);
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assert.throws(
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() => { new zlib.Deflate({level: Infinity}); },
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/^RangeError: Invalid compression level: Infinity$/
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);
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// Throws a RangeError if `level` invalid in `Deflate.prototype.params()`
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assert.throws(
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() => { new zlib.Deflate().params(-Infinity); },
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/^RangeError: Invalid compression level: -Infinity$/
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);
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assert.throws(
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() => { new zlib.Deflate().params(Infinity); },
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/^RangeError: Invalid compression level: Infinity$/
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);
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// Throws if `opts.memLevel` is invalid
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assert.throws(
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() => { new zlib.Deflate({memLevel: -Infinity}); },
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/^RangeError: Invalid memLevel: -Infinity$/
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);
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assert.throws(
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() => { new zlib.Deflate({memLevel: Infinity}); },
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/^RangeError: Invalid memLevel: Infinity$/
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);
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// Does not throw if opts.strategy is valid
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assert.doesNotThrow(
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() => { new zlib.Deflate({strategy: zlib.constants.Z_FILTERED}); }
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);
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assert.doesNotThrow(
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() => { new zlib.Deflate({strategy: zlib.constants.Z_HUFFMAN_ONLY}); }
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);
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assert.doesNotThrow(
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() => { new zlib.Deflate({strategy: zlib.constants.Z_RLE}); }
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);
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assert.doesNotThrow(
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() => { new zlib.Deflate({strategy: zlib.constants.Z_FIXED}); }
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);
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assert.doesNotThrow(
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() => { new zlib.Deflate({ strategy: zlib.constants.Z_DEFAULT_STRATEGY}); }
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);
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// Throws if opt.strategy is the wrong type.
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assert.throws(
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() => { new zlib.Deflate({ strategy: String(zlib.constants.Z_RLE) }); },
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/^TypeError: Invalid strategy: 3$/
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);
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// Throws if opts.strategy is invalid
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assert.throws(
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() => { new zlib.Deflate({strategy: 'this is a bogus strategy'}); },
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/^TypeError: Invalid strategy: this is a bogus strategy$/
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);
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// Throws TypeError if `strategy` is invalid in `Deflate.prototype.params()`
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assert.throws(
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() => { new zlib.Deflate().params(0, 'I am an invalid strategy'); },
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/^TypeError: Invalid strategy: I am an invalid strategy$/
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);
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// Throws if opts.dictionary is not a Buffer
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assert.throws(
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() => { new zlib.Deflate({dictionary: 'not a buffer'}); },
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/^TypeError: Invalid dictionary: it should be a Buffer, TypedArray, or DataView$/
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);
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