zlib: use RangeError/TypeError consistently

PR-URL: #11391
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Sam Roberts <[email protected]>

Author: jasnell

lib/zlib.js

@@ -31,9 +31,10 @@ for (var ck = 0; ck < ckeys.length; ck++) {
   codes[codes[ckey]] = ckey;
 }
 
-function isValidFlushFlag(flag) {
-  return flag >= constants.Z_NO_FLUSH &&
-         flag <= constants.Z_BLOCK;
+function isInvalidFlushFlag(flag) {
+  return typeof flag !== 'number' ||
+         flag < constants.Z_NO_FLUSH ||
+         flag > constants.Z_BLOCK;
 
   // Covers: constants.Z_NO_FLUSH (0),
   //         constants.Z_PARTIAL_FLUSH (1),
@@ -141,11 +142,11 @@ class Zlib extends Transform {
     this._opts = opts;
     this._chunkSize = opts.chunkSize || constants.Z_DEFAULT_CHUNK;
 
-    if (opts.flush && !isValidFlushFlag(opts.flush)) {
-      throw new Error('Invalid flush flag: ' + opts.flush);
+    if (opts.flush && isInvalidFlushFlag(opts.flush)) {
+      throw new RangeError('Invalid flush flag: ' + opts.flush);
     }
-    if (opts.finishFlush && !isValidFlushFlag(opts.finishFlush)) {
-      throw new Error('Invalid flush flag: ' + opts.finishFlush);
+    if (opts.finishFlush && isInvalidFlushFlag(opts.finishFlush)) {
+      throw new RangeError('Invalid flush flag: ' + opts.finishFlush);
     }
 
     this._flushFlag = opts.flush || constants.Z_NO_FLUSH;
@@ -154,37 +155,38 @@ class Zlib extends Transform {
 
     if (opts.chunkSize) {
       if (opts.chunkSize < constants.Z_MIN_CHUNK) {
-        throw new Error('Invalid chunk size: ' + opts.chunkSize);
+        throw new RangeError('Invalid chunk size: ' + opts.chunkSize);
       }
     }
 
     if (opts.windowBits) {
       if (opts.windowBits < constants.Z_MIN_WINDOWBITS ||
           opts.windowBits > constants.Z_MAX_WINDOWBITS) {
-        throw new Error('Invalid windowBits: ' + opts.windowBits);
+        throw new RangeError('Invalid windowBits: ' + opts.windowBits);
       }
     }
 
     if (opts.level) {
       if (opts.level < constants.Z_MIN_LEVEL ||
           opts.level > constants.Z_MAX_LEVEL) {
-        throw new Error('Invalid compression level: ' + opts.level);
+        throw new RangeError('Invalid compression level: ' + opts.level);
       }
     }
 
     if (opts.memLevel) {
       if (opts.memLevel < constants.Z_MIN_MEMLEVEL ||
           opts.memLevel > constants.Z_MAX_MEMLEVEL) {
-        throw new Error('Invalid memLevel: ' + opts.memLevel);
+        throw new RangeError('Invalid memLevel: ' + opts.memLevel);
       }
     }
 
     if (opts.strategy && isInvalidStrategy(opts.strategy))
-      throw new Error('Invalid strategy: ' + opts.strategy);
+      throw new TypeError('Invalid strategy: ' + opts.strategy);
 
     if (opts.dictionary) {
       if (!(opts.dictionary instanceof Buffer)) {
-        throw new Error('Invalid dictionary: it should be a Buffer instance');
+        throw new TypeError(
+          'Invalid dictionary: it should be a Buffer instance');
       }
     }
 
@@ -280,7 +282,7 @@ class Zlib extends Transform {
     var last = ending && (!chunk || ws.length === chunk.length);
 
     if (chunk !== null && !(chunk instanceof Buffer))
-      return cb(new Error('invalid input'));
+      return cb(new TypeError('invalid input'));
 
     if (!this._handle)
       return cb(new Error('zlib binding closed'));

test/parallel/test-zlib-deflate-constructors.js

@@ -15,7 +15,7 @@ assert.ok(new zlib.DeflateRaw() instanceof zlib.DeflateRaw);
 // Throws if `opts.chunkSize` is invalid
 assert.throws(
   () => { new zlib.Deflate({chunkSize: -Infinity}); },
-  /^Error: Invalid chunk size: -Infinity$/
+  /^RangeError: Invalid chunk size: -Infinity$/
 );
 
 // Confirm that maximum chunk size cannot be exceeded because it is `Infinity`.
@@ -24,23 +24,23 @@ assert.strictEqual(zlib.constants.Z_MAX_CHUNK, Infinity);
 // Throws if `opts.windowBits` is invalid
 assert.throws(
   () => { new zlib.Deflate({windowBits: -Infinity}); },
-  /^Error: Invalid windowBits: -Infinity$/
+  /^RangeError: Invalid windowBits: -Infinity$/
 );
 
 assert.throws(
   () => { new zlib.Deflate({windowBits: Infinity}); },
-  /^Error: Invalid windowBits: Infinity$/
+  /^RangeError: Invalid windowBits: Infinity$/
 );
 
 // Throws if `opts.level` is invalid
 assert.throws(
   () => { new zlib.Deflate({level: -Infinity}); },
-  /^Error: Invalid compression level: -Infinity$/
+  /^RangeError: Invalid compression level: -Infinity$/
 );
 
 assert.throws(
   () => { new zlib.Deflate({level: Infinity}); },
-  /^Error: Invalid compression level: Infinity$/
+  /^RangeError: Invalid compression level: Infinity$/
 );
 
 // Throws a RangeError if `level` invalid in  `Deflate.prototype.params()`
@@ -57,12 +57,12 @@ assert.throws(
 // Throws if `opts.memLevel` is invalid
 assert.throws(
   () => { new zlib.Deflate({memLevel: -Infinity}); },
-  /^Error: Invalid memLevel: -Infinity$/
+  /^RangeError: Invalid memLevel: -Infinity$/
 );
 
 assert.throws(
   () => { new zlib.Deflate({memLevel: Infinity}); },
-  /^Error: Invalid memLevel: Infinity$/
+  /^RangeError: Invalid memLevel: Infinity$/
 );
 
 // Does not throw if opts.strategy is valid
@@ -89,13 +89,13 @@ assert.doesNotThrow(
 // Throws if opt.strategy is the wrong type.
 assert.throws(
   () => { new zlib.Deflate({strategy: '' + zlib.constants.Z_RLE }); },
-  /^Error: Invalid strategy: 3$/
+  /^TypeError: Invalid strategy: 3$/
 );
 
 // Throws if opts.strategy is invalid
 assert.throws(
   () => { new zlib.Deflate({strategy: 'this is a bogus strategy'}); },
-  /^Error: Invalid strategy: this is a bogus strategy$/
+  /^TypeError: Invalid strategy: this is a bogus strategy$/
 );
 
 // Throws TypeError if `strategy` is invalid in `Deflate.prototype.params()`
@@ -107,5 +107,5 @@ assert.throws(
 // Throws if opts.dictionary is not a Buffer
 assert.throws(
   () => { new zlib.Deflate({dictionary: 'not a buffer'}); },
-  /^Error: Invalid dictionary: it should be a Buffer instance$/
+  /^TypeError: Invalid dictionary: it should be a Buffer instance$/
 );

test/parallel/test-zlib-flush-flags.js

@@ -9,20 +9,20 @@ assert.doesNotThrow(() => {
 
 assert.throws(() => {
   zlib.createGzip({ flush: 'foobar' });
-}, /Invalid flush flag: foobar/);
+}, /^RangeError: Invalid flush flag: foobar$/);
 
 assert.throws(() => {
   zlib.createGzip({ flush: 10000 });
-}, /Invalid flush flag: 10000/);
+}, /^RangeError: Invalid flush flag: 10000$/);
 
 assert.doesNotThrow(() => {
   zlib.createGzip({ finishFlush: zlib.constants.Z_SYNC_FLUSH });
 });
 
 assert.throws(() => {
   zlib.createGzip({ finishFlush: 'foobar' });
-}, /Invalid flush flag: foobar/);
+}, /^RangeError: Invalid flush flag: foobar$/);
 
 assert.throws(() => {
   zlib.createGzip({ finishFlush: 10000 });
-}, /Invalid flush flag: 10000/);
+}, /^RangeError: Invalid flush flag: 10000$/);