Add test case for completions when relationMode = prisma

Author: Druue

prisma-fmt/tests/text_document_completion/scenarios/referential_actions_relation_mode_prisma/result.json

@@ -0,0 +1,25 @@
+{
+  "isIncomplete": false,
+  "items": [
+    {
+      "label": "Cascade",
+      "kind": 13,
+      "detail": "Delete the child records when the parent record is deleted."
+    },
+    {
+      "label": "Restrict",
+      "kind": 13,
+      "detail": "Prevent deleting a parent record as long as it is referenced."
+    },
+    {
+      "label": "NoAction",
+      "kind": 13,
+      "detail": "Prevent deleting a parent record as long as it is referenced."
+    },
+    {
+      "label": "SetNull",
+      "kind": 13,
+      "detail": "Set the referencing fields to NULL when the referenced record is deleted."
+    }
+  ]
+}

prisma-fmt/tests/text_document_completion/scenarios/referential_actions_relation_mode_prisma/schema.prisma

@@ -0,0 +1,16 @@
+datasource db {
+    provider = "mongodb"
+    url      = env("DATABASE_URL")
+}
+
+model Post {
+    id       String @id @default(auto()) @map("_id") @db.ObjectId
+    title    String
+    author   User   @relation(fields: [authorId], references: [id], onDelete: <|>)
+    authorId String @db.ObjectId
+}
+
+model User {
+    id    String @id @default(auto()) @map("_id") @db.ObjectId
+    posts Post[]
+}

prisma-fmt/tests/text_document_completion/tests.rs

@@ -35,6 +35,7 @@ scenarios! {
     referential_actions_in_progress_2
     referential_actions_middle_of_args_list
     referential_actions_mssql
+    referential_actions_relation_mode_prisma
     referential_actions_with_trailing_comma
     datasource_default_completions
     datasource_multischema