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// Copyright 2011 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Unit tests for the abstract cryptographic hash interface.
*
*/
goog.provide('goog.crypt.hash_test');
goog.require('goog.testing.asserts');
goog.setTestOnly('hash_test');
goog.crypt.hash_test.runBasicTests = function(hash) {
// Compute some hash.
hash.update([97, 158]);
var golden = hash.digest();
// Recompute the hash.
hash.reset();
hash.update([97, 158]);
assertArrayEquals('The reset did not produce the initial state',
golden, hash.digest());
// Check for a trivial collision.
hash.reset();
hash.update([158, 97]);
assertTrue('Swapping bytes resulted in a hash collision',
!!goog.testing.asserts.findDifferences(golden, hash.digest()));
// Compute in parts.
hash.reset();
hash.update([97]);
hash.update([158]);
assertArrayEquals('Partial updates resulted in a different hash',
golden, hash.digest());
// Test update with specified length.
hash.reset();
hash.update([97, 158], 0);
hash.update([97, 158, 32], 2);
assertArrayEquals('Updating with an explicit buffer length did not work',
golden, hash.digest());
// Test array and string inputs.
hash.reset();
hash.update([97, 66]);
golden = hash.digest();
hash.reset();
hash.update('aB');
assertArrayEquals('String and array inputs should give the same result',
golden, hash.digest());
// Empty hash.
hash.reset();
var empty = hash.digest();
assertTrue('Empty hash collided with a non-trivial one',
!!goog.testing.asserts.findDifferences(golden, empty));
// Zero-length array update.
hash.reset();
hash.update([]);
assertArrayEquals('Updating with an empty array did not give an empty hash',
empty, hash.digest());
// Zero-length string update.
hash.reset();
hash.update('');
assertArrayEquals('Updating with an empty string did not give an empty hash',
empty, hash.digest());
};
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