Add tests for newly exposed API methods

test/api-test.js

@@ -270,6 +270,48 @@ describe('RippleAPI', function () {
       }, /dropsToXrp:\ invalid\ value\ '\.\.\.'\,\ should\ be\ a\ number\ matching\ \(\^\-\?\[0\-9\]\*\.\?\[0\-9\]\*\$\)\./)
     })
   })
+
+  describe('isValidAddress', function () {
+    it('returns true for valid address', function () {
+      assert(this.api.isValidAddress('rLczgQHxPhWtjkaQqn3Q6UM8AbRbbRvs5K'));
+    })
+
+    it('returns false for invalid address', function () {
+      assert(!this.api.isValidAddress('foobar'));
+    })
+  })
+
+  describe('isValidSecret', function () {
+    it('returns true for valid secret', function () {
+      assert(this.api.isValidSecret('snsakdSrZSLkYpCXxfRkS4Sh96PMK'));
+    })
+
+    it('returns false for invalid secret', function () {
+      assert(!this.api.isValidSecret('foobar'));
+    })
+  })
+
+  describe('deriveKeypair', function () {
+    it('returns keypair for secret', function () {
+      var keypair = this.api.deriveKeypair('snsakdSrZSLkYpCXxfRkS4Sh96PMK');
+      assert.equal(keypair.privateKey, '008850736302221AFD59FF9CA1A29D4975F491D726249302EE48A3078A8934D335');
+      assert.equal(keypair.publicKey, '035332FBA71D705BD5D97014A833BE2BBB25BEFCD3506198E14AFEA241B98C2D06');
+    })
+
+    it('throws with an invalid secret', function (){
+      assert.throws(() => {
+        this.api.deriveKeypair('...');
+      }, /^Error\: Non\-base58 character$/)
+    })
+  })
+
+  describe('deriveAddress', function () {
+    it('returns address for public key', function () {
+      var address = this.api.deriveAddress('035332FBA71D705BD5D97014A833BE2BBB25BEFCD3506198E14AFEA241B98C2D06');
+      assert.equal(address, 'rLczgQHxPhWtjkaQqn3Q6UM8AbRbbRvs5K');
+    })
+  })
+
   describe('pagination', function () {
 
     describe('hasNextPage', function () {