增加了git功能，但是还未完善

node_modules/sha.js/test/hash.js

@@ -0,0 +1,80 @@
+'use strict';
+
+var tape = require('tape');
+var Buffer = require('safe-buffer').Buffer;
+
+var Hash = require('../hash');
+
+var hex = '0A1B2C3D4E5F6G7H';
+
+function equal(t, a, b) {
+	t.equal(a.length, b.length);
+	t.equal(a.toString('hex'), b.toString('hex'));
+}
+
+var hexBuf = Buffer.from('0A1B2C3D4E5F6G7H', 'utf8');
+var count16 = {
+	strings: ['0A1B2C3D4E5F6G7H'],
+	buffers: [
+		hexBuf,
+		Buffer.from('80000000000000000000000000000080', 'hex')
+	]
+};
+
+var empty = {
+	strings: [''],
+	buffers: [
+		Buffer.from('80000000000000000000000000000000', 'hex')
+	]
+};
+
+var multi = {
+	strings: ['abcd', 'efhijk', 'lmnopq'],
+	buffers: [
+		Buffer.from('abcdefhijklmnopq', 'ascii'),
+		Buffer.from('80000000000000000000000000000080', 'hex')
+	]
+};
+
+var long = {
+	strings: [hex + hex],
+	buffers: [
+		hexBuf,
+		hexBuf,
+		Buffer.from('80000000000000000000000000000100', 'hex')
+	]
+};
+
+function makeTest(name, data) {
+	tape(name, function (t) {
+		var h = new Hash(16, 8);
+		var hash = Buffer.alloc(20);
+		var n = 2;
+		var expected = data.buffers.slice();
+		// t.plan(expected.length + 1)
+
+		h._update = function (block) {
+			var e = expected.shift();
+			equal(t, block, e);
+
+			if (n < 0) {
+				throw new Error('expecting only 2 calls to _update');
+			}
+		};
+		h._hash = function () {
+			return hash;
+		};
+
+		data.strings.forEach(function (string) {
+			h.update(string, 'ascii');
+		});
+
+		equal(t, h.digest(), hash);
+		t.end();
+	});
+}
+
+makeTest('Hash#update 1 in 1', count16);
+makeTest('empty Hash#update', empty);
+makeTest('Hash#update 1 in 3', multi);
+makeTest('Hash#update 2 in 1', long);