test: use strictEqual in tests

system-test/dns.js

@@ -148,7 +148,7 @@ const DNS_DOMAIN = process.env.GCLOUD_TESTS_DNS_DOMAIN;
     it('should get the metadata for a zone', function(done) {
       ZONE.getMetadata(function(err, metadata) {
         assert.ifError(err);
-        assert.equal(metadata.name, ZONE_NAME);
+        assert.strictEqual(metadata.name, ZONE_NAME);
         done();
       });
     });

test/index.js

@@ -33,7 +33,7 @@ const fakePaginator = {
 
     extended = true;
     methods = arrify(methods);
-    assert.equal(Class.name, 'DNS');
+    assert.strictEqual(Class.name, 'DNS');
     assert.deepEqual(methods, ['getZones']);
   },
   streamify: function(methodName) {
@@ -274,7 +274,7 @@ describe('DNS', function() {
 
     it('should use an empty query if one was not provided', function(done) {
       dns.request = function(reqOpts) {
-        assert.equal(Object.keys(reqOpts.qs).length, 0);
+        assert.strictEqual(Object.keys(reqOpts.qs).length, 0);
         done();
       };
 

test/zone.js

@@ -86,7 +86,7 @@ const fakePaginator = {
 
     extended = true;
     methods = arrify(methods);
-    assert.equal(Class.name, 'Zone');
+    assert.strictEqual(Class.name, 'Zone');
     assert.deepEqual(methods, ['getChanges', 'getRecords']);
   },
   streamify: function(methodName) {