function testIdentityKeyStore(store, registrationId, identityKey) {
    describe('IdentityKeyStore', function() {
        var number = '+5558675309';
        var address = new libsignal.SignalProtocolAddress('+5558675309', 1);
        var testKey;
        before(function(done) {
            Internal.crypto.createKeyPair().then(function(keyPair) {
                testKey = keyPair;
            }).then(done,done);
        });

        describe('getLocalRegistrationId', function() {
            it('retrieves my registration id', function(done) {
                store.getLocalRegistrationId().then(function(reg) {
                    assert.strictEqual(reg, registrationId);
                }).then(done, done);
            });
        });
        describe('getIdentityKeyPair', function() {
            it('retrieves my identity key', function(done) {
                store.getIdentityKeyPair().then(function(key) {
                    assertEqualArrayBuffers(key.pubKey, identityKey.pubKey);
                    assertEqualArrayBuffers(key.privKey, identityKey.privKey);
                }).then(done,done);
            });
        });
        describe('saveIdentity', function() {
            it('stores identity keys', function(done) {
                store.saveIdentity(address.toString(), testKey.pubKey).then(function() {
                    return store.loadIdentityKey(number).then(function(key) {
                        assertEqualArrayBuffers(key, testKey.pubKey);
                    });
                }).then(done,done);
            });
        });
        describe('isTrustedIdentity', function() {
            it('returns true if a key is trusted', function(done) {
                store.saveIdentity(address.toString(), testKey.pubKey).then(function() {
                    store.isTrustedIdentity(number, testKey.pubKey).then(function(trusted) {
                        if (trusted) {
                            done();
                        } else {
                            done(new Error('Wrong value for trusted key'));
                        }
                    }).catch(done);
                });
            });
            it('returns false if a key is untrusted', function(done) {
                var newIdentity = libsignal.crypto.getRandomBytes(33);
                store.saveIdentity(address.toString(), testKey.pubKey).then(function() {
                    store.isTrustedIdentity(number, newIdentity).then(function(trusted) {
                        if (trusted) {
                            done(new Error('Wrong value for untrusted key'));
                        } else {
                            done();
                        }
                    }).catch(done);
                });
            });
        });
    });
}