test: [MSSQL] upgrade test

[#185202616](https://www.pivotaltracker.com/story/show/185202616)

acceptance-tests/upgrade/update_and_upgrade_mssql_test.go

@@ -0,0 +1,97 @@
+package upgrade_test
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+
+	"csbbrokerpakaws/acceptance-tests/helpers/apps"
+	"csbbrokerpakaws/acceptance-tests/helpers/brokers"
+	"csbbrokerpakaws/acceptance-tests/helpers/random"
+	"csbbrokerpakaws/acceptance-tests/helpers/services"
+)
+
+var _ = Describe("UpgradeMSSQLTest", Label("mssql", "upgrade"), func() {
+	When("upgrading broker version", func() {
+		It("should continue to work", func() {
+			By("pushing latest released broker version")
+
+			serviceBroker := brokers.Create(
+				brokers.WithPrefix("csb-aws-mssql"),
+				brokers.WithSourceDir(releasedBuildDir),
+				brokers.WithReleaseEnv(releasedBuildDir),
+			)
+			defer serviceBroker.Delete()
+
+			By("creating a service")
+			// without backups and multi az to speed up the process
+			params := map[string]any{
+				"backup_retention_period": 0,
+				"multi_az":                false,
+			}
+
+			serviceInstance := services.CreateInstance(
+				"csb-aws-mssql",
+				services.WithPlan("default"),
+				services.WithParameters(params),
+				services.WithBroker(serviceBroker),
+			)
+			defer serviceInstance.Delete()
+
+			By("pushing the unstarted app twice")
+			appWriter := apps.Push(apps.WithApp(apps.MSSQL))
+			appReader := apps.Push(apps.WithApp(apps.MSSQL))
+			defer apps.Delete(appWriter, appReader)
+
+			By("binding the the writer app")
+			bindingWriter := serviceInstance.Bind(appWriter)
+
+			By("starting the writer app")
+			apps.Start(appWriter)
+
+			By("creating a schema using the first app")
+			schema := random.Name(random.WithMaxLength(10))
+			appWriter.PUT("", "%s?dbo=false", schema)
+
+			By("setting a key-value using the first app")
+			key := random.Hexadecimal()
+			value := random.Hexadecimal()
+			appWriter.PUT(value, "%s/%s", schema, key)
+
+			By("binding the reader app")
+			bindingReader := serviceInstance.Bind(appReader)
+
+			By("starting the reader app")
+			apps.Start(appReader)
+
+			By("getting the entry using the reader app")
+			got := appReader.GET("%s/%s", schema, key).String()
+			Expect(got).To(Equal(value))
+
+			By("pushing the development version of the broker")
+			serviceBroker.UpdateBroker(developmentBuildDir)
+
+			By("upgrading service instance")
+			serviceInstance.Upgrade()
+
+			By("getting the entry using the reader app after upgrading")
+			got = appReader.GET("%s/%s", schema, key).String()
+			Expect(got).To(Equal(value))
+
+			By("deleting bindings created before the upgrade")
+			bindingWriter.Unbind()
+			bindingReader.Unbind()
+
+			By("creating new bindings and testing they still work")
+			serviceInstance.Bind(appWriter)
+			serviceInstance.Bind(appReader)
+			apps.Restage(appWriter, appReader)
+
+			By("checking data can still be written and read")
+			key = random.Hexadecimal()
+			value = random.Hexadecimal()
+			appWriter.PUT(value, "%s/%s", schema, key)
+			got = appReader.GET("%s/%s", schema, key).String()
+			Expect(got).To(Equal(value))
+		})
+	})
+})