Fixes Script test case for coverage and style

lib/script/script.js

@@ -709,11 +709,11 @@ Script.prototype.toAddress = function(network) {
   $.checkArgument(network, 'Must provide a network');
   if (this.isPublicKeyHashOut()) {
     return new Address(this.getData(), network, Address.PayToPublicKeyHash);
-  }
-  if (this.isScriptHashOut()) {
+  } else if (this.isScriptHashOut()) {
     return new Address(this.getData(), network, Address.PayToScriptHash);
+  } else {
+    throw new Error('The script type needs to be PayToPublicKeyHash or PayToScriptHash');
   }
-  throw new Error('The script type needs to be PayToPublicKeyHash or PayToScriptHash');
 };
 
 /**

test/script/script.js

@@ -585,13 +585,9 @@ describe('Script', function() {
       expect(BufferUtil.equal(Script('OP_RETURN 1 0xFF').getData(), new Buffer([255]))).to.be.true();
     });
     it('fails if content is not recognized', function() {
-      var failed = false;
-      try {
-        Script('1 0xFF').getData();
-      } catch (e) {
-        failed = true;
-      }
-      failed.should.equal(true);
+      expect(function() {
+        return Script('1 0xFF').getData();
+      }).to.throw();
     });
   });
 
@@ -609,13 +605,9 @@ describe('Script', function() {
       script.toAddress(Networks.livenet).toString().should.equal(stringAddress);
     });
     it('fails if content is not recognized', function() {
-      var failed = false;
-      try {
-        Script().toAddress();
-      } catch (e) {
-        failed = true;
-      }
-      failed.should.equal(true);
+      expect(function() {
+        return Script().toAddress(Networks.livenet);
+      }).to.throw();
     });
   });