update test and fix formatting

lib/ipv4.ts

@@ -117,7 +117,6 @@ export class Address4 {
     return Address4.fromHex(integer.toString(16));
   }
 
-
   /**
    * Return an address from in-addr.arpa form
    * @memberof Address4
@@ -132,14 +131,11 @@ export class Address4 {
     // remove ending ".in-addr.arpa." or just "."
     const leader = arpaFormAddress.replace(/(\.in-addr\.arpa)?\.$/, '');
 
-    const address = leader.split('.')
-      .reverse()
-      .join('.');
+    const address = leader.split('.').reverse().join('.');
 
     return new Address4(address);
   }
 
-
   /**
    * Converts an IPv4 address object to a hex string
    * @memberof Address4
@@ -311,16 +307,13 @@ export class Address4 {
       options = {};
     }
 
-    const reversed = this.correctForm()
-      .split('.')
-      .reverse()
-      .join('.');
+    const reversed = this.correctForm().split('.').reverse().join('.');
 
     if (options.omitSuffix) {
       return reversed;
-    } else {
-      return sprintf('%s.in-addr.arpa.', reversed);
     }
+
+    return sprintf('%s.in-addr.arpa.', reversed);
   }
 
   /**

test/address-test.ts

@@ -30,12 +30,15 @@ function addressIs(addressString: string, descriptors: string[]) {
           address4.subnetMask.should.be.at.least(0);
           address4.subnetMask.should.be.at.most(128);
         });
+
         it('converts to arpa format and back', () => {
           const arpa = address4.reverseForm();
           arpa.length.should.be.at.most(29);
 
-          const converted = Address4.fromArpa(arpa);
+          const arpaWithoutSuffix = address4.reverseForm({ omitSuffix: true });
+          arpaWithoutSuffix.length.should.be.at.most(15);
 
+          const converted = Address4.fromArpa(arpa);
           address4.correctForm().should.equal(converted.correctForm());
         });
       }