fix: Exclude ARM params with null values (#325)

- [x] Eliminate explicit `type` from valued paramaters
- [x] Remove any parameters whose value is `null` before deployment
- [x] Make `type` optional on `ArmParameters`

Author: tbarlow12

src/armTemplates/compositeArmTemplate.ts

@@ -41,7 +41,6 @@ export class CompositeArmTemplate implements ArmResourceTemplateGenerator {
         ...parameters,
         ...resource.getParameters(config),
         location: {
-          type: ArmParamType.String,
           value: AzureNamingService.getNormalizedRegionName(config.provider.region)
         }
       };

src/armTemplates/resources/apim.ts

@@ -74,23 +74,18 @@ export class ApimResource implements ArmResourceTemplateGenerator {
 
     return {
       apiManagementName: {
-        type: ArmParamType.String,
         value: ApimResource.getResourceName(config),
       },
       apimSkuName: {
-        type: ArmParamType.String,
         value: apimConfig.sku.name,
       },
       apimSkuCapacity: {
-        type: ArmParamType.Int,
         value: apimConfig.sku.capacity,
       },
       apimPublisherEmail: {
-        type: ArmParamType.String,
         value: apimConfig.publisherEmail,
       },
       apimPublisherName: {
-        type: ArmParamType.String,
         value: apimConfig.publisherName,
       }
     };

src/armTemplates/resources/appInsights.ts

@@ -46,7 +46,6 @@ export class AppInsightsResource implements ArmResourceTemplateGenerator {
   public getParameters(config: ServerlessAzureConfig): ArmParameters {
     return {
       appInsightsName: {
-        type: ArmParamType.String,
         value: AppInsightsResource.getResourceName(config),
       }
     };

src/armTemplates/resources/appServicePlan.ts

@@ -65,15 +65,12 @@ export class AppServicePlanResource implements ArmResourceTemplateGenerator {
 
     return {
       appServicePlanName: {
-        type: ArmParamType.String,
         value: AppServicePlanResource.getResourceName(config),
       },
       appServicePlanSkuName: {
-        type: ArmParamType.String,
         value: resourceConfig.sku.name,
       },
       appServicePlanSkuTier: {
-        type: ArmParamType.String,
         value: resourceConfig.sku.tier,
       }
     }

src/armTemplates/resources/functionApp.ts

@@ -126,19 +126,15 @@ export class FunctionAppResource implements ArmResourceTemplateGenerator {
 
     return {
       functionAppName: {
-        type: ArmParamType.String,
         value: FunctionAppResource.getResourceName(config),
       },
       functionAppNodeVersion: {
-        type: ArmParamType.String,
         value: resourceConfig.nodeVersion,
       },
       functionAppWorkerRuntime: {
-        type: ArmParamType.String,
         value: resourceConfig.workerRuntime,
       },
       functionAppExtensionVersion: {
-        type: ArmParamType.String,
         value: resourceConfig.extensionVersion,
       }
     };

src/armTemplates/resources/hostingEnvironment.ts

@@ -68,7 +68,6 @@ export class HostingEnvironmentResource implements ArmResourceTemplateGenerator
   public getParameters(config: ServerlessAzureConfig): ArmParameters {
     return {
       hostingEnvironmentName: {
-        type: ArmParamType.String,
         value: HostingEnvironmentResource.getResourceName(config)
       }
     }

src/armTemplates/resources/storageAccount.ts

@@ -66,15 +66,12 @@ export class StorageAccountResource implements ArmResourceTemplateGenerator {
 
     return {
       storageAccountName: {
-        type: ArmParamType.String,
         value: StorageAccountResource.getResourceName(config),
       },
       storageAccountSkuName: {
-        type: ArmParamType.String,
         value: resourceConfig.sku.name,
       },
       storageAccoutSkuTier: {
-        type: ArmParamType.String,
         value: resourceConfig.sku.tier,
       }
     };

src/armTemplates/resources/virtualNetwork.ts

@@ -86,7 +86,6 @@ export class VirtualNetworkResource implements ArmResourceTemplateGenerator {
   public getParameters(config: ServerlessAzureConfig): ArmParameters {
     return {
       virtualNetworkName: {
-        type: ArmParamType.String,
         value: VirtualNetworkResource.getResourceName(config),
       }
     }

src/models/armTemplates.ts

@@ -46,7 +46,7 @@ export interface ArmResourceTemplate {
 
 export interface ArmParameters {
   [key: string]: {
-    type: ArmParamType;
+    type?: ArmParamType;
     value?: string | number;
     defaultValue?: string | number;
   };

src/services/armService.test.ts

@@ -366,5 +366,40 @@ describe("Arm Service", () => {
           new RegExp(`.*${errorPattern}.*`,"s")
         );
     });
+
+    it("Does not try to include paramaters with a value that is undefined", async () => {
+      sls.service.provider.runtime = "nodejs10.x";
+      const deployment = await service.createDeploymentFromType(ArmTemplateType.Consumption);
+
+      expect(deployment.parameters.functionAppExtensionVersion).not.toBeUndefined();
+      expect(deployment.parameters.functionAppExtensionVersion.value).toBeUndefined();
+
+      await service.deployTemplate(deployment);
+
+      expect(deployment.parameters.functionAppExtensionVersion).toBeUndefined();
+
+      const paramKeys = Object.keys(deployment.parameters);
+      paramKeys.forEach((key) => {
+        const paramValue = deployment.parameters[key];
+        if (paramValue) {
+          expect(paramValue.value).not.toBeUndefined();
+        }
+      })
+
+      const expectedResourceGroup = sls.service.provider["resourceGroup"];
+      const expectedDeploymentName = sls.service.provider["deploymentName"] || `${this.resourceGroup}-deployment`;
+      const expectedDeploymentNameRegex = new RegExp(expectedDeploymentName + "-t([0-9]+)")
+      const expectedDeployment: Deployment = {
+        properties: {
+          mode: "Incremental",
+          ...deployment
+        },
+      };
+
+      const call = (Deployments.prototype.createOrUpdate as any).mock.calls[0];
+      expect(call[0]).toEqual(expectedResourceGroup);
+      expect(call[1]).toMatch(expectedDeploymentNameRegex);
+      expect(call[2]).toEqual(expectedDeployment);
+    });
   });
 });