Add tests for reading basic types

nbt-spec.js

@@ -3,6 +3,80 @@
 var fs = require('fs'),
     nbt = require('./nbt');
 
+describe('nbt.Reader', function() {
+	it('is constructed with a buffer array', function() {
+		new nbt.Reader(new Buffer([1, 2, 3]));
+	});
+
+	it('reads 8-bit bytes', function() {
+		var reader = new nbt.Reader(new Buffer([0, 127, -127]));
+		expect(reader.byte()).toEqual(0);
+		expect(reader.byte()).toEqual(127);
+		expect(reader.byte()).toEqual(-127);
+	});
+
+	it('reads 16-bit shorts', function() {
+		var reader = new nbt.Reader(new Buffer([
+			0,0, 0,255, -127,255
+		]));
+		expect(reader.short()).toEqual(0);
+		expect(reader.short()).toEqual(255);
+		expect(reader.short()).toEqual((-127 << 8) | 255);
+	});
+
+	it('reads 32-bit ints', function() {
+		var reader = new nbt.Reader(new Buffer([
+			0,0,0,0,
+			0,0,0,255,
+			-127,0,0,0
+		]));
+		expect(reader.int()).toEqual(0);
+		expect(reader.int()).toEqual(255);
+		expect(reader.int()).toEqual(-127 << 24);
+	});
+
+	it('reads 64-bit longs', function() {
+		var reader = new nbt.Reader(new Buffer([
+			0,0,0,0,0,0,0,0,
+			0,0,0,0,0,0,0,255,
+			-127,0,0,0,0,0,0,0
+		]));
+		expect(reader.long()).toEqual(0);
+		expect(reader.long()).toEqual(255);
+
+		/* false pass - JS only has 53 bit precision */
+		expect(reader.long()).toEqual(-127 << 56);
+	});
+
+	it('reads 8-bit byte arrays', function() {
+		var reader = new nbt.Reader(new Buffer([
+			0,0,0,2, 1,2,
+			0,0,0,4, 3,4,5,6
+		]));
+		expect(reader.byteArray()).toEqual([1, 2]);
+		expect(reader.byteArray()).toEqual([3, 4, 5, 6]);
+	});
+
+	it('reads 32-bit int arrays', function() {
+		var reader = new nbt.Reader(new Buffer([
+			0,0,0,2, 0,0,0,1, 0,0,0,2,
+			0,0,0,4, 0,0,0,3, 0,0,0,4, 0,0,0,5, 0,0,0,6,
+		]));
+		expect(reader.intArray()).toEqual([1, 2]);
+		expect(reader.intArray()).toEqual([3, 4, 5, 6]);
+	});
+
+	it('reads strings', function() {
+		var reader = new nbt.Reader(new Buffer([
+			0,6,  0x48,0x65,0x6C,0x6C,0x6F,0x21,
+			0,16, 0xE3,0x81,0x93,0xE3,0x82,0x93,0xE3,0x81,
+			      0xAB,0xE3,0x81,0xA1,0xE3,0x81,0xAF,0x21
+		]));
+		expect(reader.string()).toEqual('Hello!');
+		expect(reader.string()).toEqual('こんにちは!');
+	});
+});
+
 describe('nbt.parse', function() {
 	it('parses a compressed NBT file', function() {
 		var callback = jasmine.createSpy();