fix: issue-10386 (GoogleCloudPlatform#5461)

mmv1/products/essentialcontacts/api.yaml

@@ -55,6 +55,7 @@ objects:
           The identifier for the contact. Format: {resourceType}/{resource_id}/contacts/{contact_id}
       - !ruby/object:Api::Type::String
         name: 'email'
+        input: true
         required: true
         description: |
           The email address to send notifications to. This does not need to be a Google account.

mmv1/third_party/terraform/tests/resource_essential_contacts_contact_test.go

@@ -0,0 +1,77 @@
+package google
+
+import (
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccEssentialContactsContact_update(t *testing.T) {
+	t.Parallel()
+
+	context := map[string]interface{}{
+		"random_suffix": randString(t, 10),
+	}
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckEssentialContactsContactDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccEssentialContactsContact_v1(context),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr("google_essential_contacts_contact.contact",
+						"email", "[email protected]"),
+				),
+			},
+			{
+				ResourceName:            "google_essential_contacts_contact.contact",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"parent"},
+			},
+			{
+				Config: testAccEssentialContactsContact_v2(context),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr("google_essential_contacts_contact.contact",
+						"email", "[email protected]"),
+				),
+			},
+			{
+				ResourceName:            "google_essential_contacts_contact.contact",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"parent"},
+			},
+		},
+	})
+}
+
+func testAccEssentialContactsContact_v1(context map[string]interface{}) string {
+	return Nprintf(`
+data "google_project" "project" {
+}
+
+resource "google_essential_contacts_contact" "contact" {
+  parent = data.google_project.project.id
+  email = "[email protected]"
+  language_tag = "en-GB"
+  notification_category_subscriptions = ["ALL"]
+}
+`, context)
+}
+
+func testAccEssentialContactsContact_v2(context map[string]interface{}) string {
+	return Nprintf(`
+data "google_project" "project" {
+}
+
+resource "google_essential_contacts_contact" "contact" {
+  parent = data.google_project.project.id
+  email = "[email protected]"
+  language_tag = "en-GB"
+  notification_category_subscriptions = ["ALL"]
+}
+`, context)
+}