Add emulator unit tests

Author: lahirumaramba

package.json

@@ -15,8 +15,8 @@
     "lint": "run-p lint:src lint:test",
     "test": "run-s lint test:unit",
     "integration": "run-s build test:integration",
-    "test:unit": "mocha test/unit/data-connect/*.spec.ts --require ts-node/register",
-    "test:integration": "mocha test/integration/setup.ts test/integration/data-connect.spec.ts --slow 5000 --timeout 20000 --require ts-node/register",
+    "test:unit": "mocha test/unit/*.spec.ts --require ts-node/register",
+    "test:integration": "mocha test/integration/*.ts --slow 5000 --timeout 20000 --require ts-node/register",
     "test:coverage": "nyc npm run test:unit",
     "lint:src": "eslint src/ --ext .ts",
     "lint:test": "eslint test/ --ext .ts",

test/unit/data-connect/data-connect-api-client-internal.spec.ts

@@ -87,6 +87,9 @@ describe('DataConnectApiClient', () => {
 
   afterEach(() => {
     sandbox.restore();
+    if (process.env.DATA_CONNECT_EMULATOR_HOST) {
+      delete process.env.DATA_CONNECT_EMULATOR_HOST;
+    }
     return app.delete();
   });
 
@@ -204,5 +207,21 @@ describe('DataConnectApiClient', () => {
           });
         });
     });
+
+    it('should use DATA_CONNECT_EMULATOR_HOST if set', () => {
+      process.env.DATA_CONNECT_EMULATOR_HOST = 'http://localhost:9000';
+      const stub = sandbox
+        .stub(HttpClient.prototype, 'send')
+        .resolves(utils.responseFrom(TEST_RESPONSE, 200));
+      return apiClient.executeGraphql('query', {})
+        .then(() => {
+          expect(stub).to.have.been.calledOnce.and.calledWith({
+            method: 'POST',
+            url: `http://localhost:9000/v1alpha/projects/test-project/locations/${connectorConfig.location}/services/${connectorConfig.serviceId}:executeGraphql`,
+            headers: EXPECTED_HEADERS,
+            data: { query: 'query' }
+          });
+        });
+    });
   });
 });