Added unit tests for coin.js

test/coin-test.js

@@ -48,4 +48,69 @@ describe('Coin', function() {
     assert(fmt.includes('coinbase'));
     assert(fmt.includes('script'));
   });
+
+  it('should validate input types', function() {
+    assert.throws(() => new Coin().fromOptions({ version: '1' }));
+    assert.throws(() => new Coin().fromOptions({ height: -2 }));
+    assert.throws(() => new Coin().fromOptions({ value: -1 }));
+    assert.throws(() => new Coin().fromOptions({ coinbase: 'true' }));
+    assert.throws(() => new Coin().fromOptions({ hash: 'abc' }));
+    assert.throws(() => new Coin().fromOptions({ index: -1 }));
+  });
+
+  it('should correctly calculate depth', () => {
+    const coin = new Coin({
+      version: 1,
+      height: 100,
+      value: 5000000000,
+      script: Buffer.from('76a91476a04053bda0a88bda5177b86a15c3b29f5598788ac', 'hex'),
+      coinbase: false,
+      hash: Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex'),
+      index: 0
+    });
+
+    assert.strictEqual(coin.getDepth(99), 0);
+    assert.strictEqual(coin.getDepth(100), 1);
+    assert.strictEqual(coin.getDepth(101), 2);
+  });
+
+  it('should correctly serialize and deserialize to/from JSON', () => {
+    const coin = new Coin({
+      version: 1,
+      height: 100,
+      value: 5000000000,
+      script: Buffer.from('76a91476a04053bda0a88bda5177b86a15c3b29f5598788ac', 'hex'),
+      coinbase: false,
+      hash: Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex'),
+      index: 0
+    });
+
+    const json = coin.toJSON();
+    const coin2 = Coin.fromJSON(json);
+
+    assert.deepStrictEqual(coin.toRaw(), coin2.toRaw());
+  });
+
+
+  it('should create a coin from options', function() {
+    const options = {
+      version: 1,
+      height: 42,
+      value: 1000000,
+      script: Buffer.from('a914d7f6d1c6e2d6eeb2ae2f88a52f032cbbf5e5b5c987', 'hex'),
+      coinbase: false,
+      hash: Buffer.from('0'.repeat(64), 'hex'),
+      index: 0
+    };
+
+    const coin = Coin.fromOptions(options);
+
+    assert.strictEqual(coin.version, options.version);
+    assert.strictEqual(coin.height, options.height);
+    assert.strictEqual(coin.value, options.value);
+    assert.deepStrictEqual(coin.script.toRaw(), options.script);
+    assert.strictEqual(coin.coinbase, options.coinbase);
+    assert.deepStrictEqual(coin.hash, options.hash);
+    assert.strictEqual(coin.index, options.index);
+  });
 });