Added Subject Field to Alert Policy Monitoring Resource (GoogleCloudP…

…latform#9360)

* Added Alert Policy resource field for subject line.

* Added test for Alert Policy field.

* Included subject in one_of lists.

* Included subject in one_of lists.

mmv1/products/monitoring/AlertPolicy.yaml

@@ -971,6 +971,7 @@ properties:
         at_least_one_of:
           - documentation.0.content
           - documentation.0.mime_type
+          - documentation.0.subject
         description: |
           The text of the documentation, interpreted according to mimeType.
           The content may not exceed 8,192 Unicode characters and may not
@@ -981,7 +982,19 @@ properties:
         at_least_one_of:
           - documentation.0.content
           - documentation.0.mime_type
+          - documentation.0.subject
         default_value: text/markdown
         description: |
           The format of the content field. Presently, only the value
           "text/markdown" is supported.
+      - !ruby/object:Api::Type::String
+        name: subject
+        at_least_one_of:
+          - documentation.0.content
+          - documentation.0.mime_type
+          - documentation.0.subject
+        description: |
+          The subject line of the notification. The subject line may not
+          exceed 10,240 bytes. In notifications generated by this policy the contents
+          of the subject line after variable expansion will be truncated to 255 bytes
+          or shorter at the latest UTF-8 character boundary.

mmv1/third_party/terraform/services/monitoring/resource_monitoring_alert_policy_test.go

@@ -322,6 +322,7 @@ resource "google_monitoring_alert_policy" "full" {
   documentation {
     content   = "test content"
     mime_type = "text/markdown"
+    subject = "test subject"
   }
 }
 `, alertName, conditionName1, conditionName2)
@@ -350,6 +351,7 @@ resource "google_monitoring_alert_policy" "mql" {
   documentation {
     content   = "test content"
     mime_type = "text/markdown"
+    subject = "test subject"
   }
 }
 `, alertName, conditionName)
@@ -383,6 +385,7 @@ resource "google_monitoring_alert_policy" "log" {
   documentation {
     content   = "test content"
     mime_type = "text/markdown"
+    subject = "test subject"    
   }
 }
 `, alertName, conditionName)
@@ -441,6 +444,7 @@ resource "google_monitoring_alert_policy" "promql" {
   documentation {
     content   = "test content"
     mime_type = "text/markdown"
+    subject = "test subject"
   }
 }
 `, alertName, conditionName)