diff --git a/lib/ex_typesense/test_schema/product.ex b/lib/ex_typesense/test_schema/product.ex
new file mode 100644
index 0000000..3b8c0ff
--- /dev/null
+++ b/lib/ex_typesense/test_schema/product.ex
@@ -0,0 +1,38 @@
+defmodule ExTypesense.TestSchema.Product do
+  use Ecto.Schema
+  @behaviour ExTypesense
+
+  @moduledoc false
+
+  defimpl Jason.Encoder, for: __MODULE__ do
+    def encode(value, opts) do
+      value
+      |> Map.take([:poducts_id, :name, :description])
+      |> Enum.map(fn {key, val} ->
+        if key === :products_id, do: {key, Map.get(value, :id)}, else: {key, val}
+      end)
+      |> Enum.into(%{})
+      |> Jason.Encode.map(opts)
+    end
+  end
+
+  schema "products" do
+    field(:name, :string)
+    field(:description, :string)
+    field(:products_id, :integer, virtual: true)
+  end
+
+  @impl ExTypesense
+  def get_field_types do
+    primary_field = __MODULE__.__schema__(:source) <> "_id"
+
+    %{
+      default_sorting_field: primary_field,
+      fields: [
+        %{name: primary_field, type: "int32"},
+        %{name: "name", type: "string"},
+        %{name: "description", type: "string"}
+      ]
+    }
+  end
+end
diff --git a/test/collection_test.exs b/test/collection_test.exs
index 836e3bd..072ef54 100644
--- a/test/collection_test.exs
+++ b/test/collection_test.exs
@@ -1,6 +1,8 @@
 defmodule CollectionTest do
   use ExUnit.Case, async: true
 
+  alias ExTypesense.TestSchema.Product
+
   setup_all do
     schema = %{
       name: "collection_companies",
@@ -14,22 +16,47 @@ defmodule CollectionTest do
 
     on_exit(fn ->
       ExTypesense.drop_collection(schema.name)
+      ExTypesense.drop_collection(Product)
     end)
 
     %{schema: schema}
   end
 
   test "success: create and drop collection", %{schema: schema} do
-    collection = ExTypesense.create_collection(schema)
-    assert %ExTypesense.Collection{} = collection
+    products = ExTypesense.create_collection(Product)
+    collection_companies = ExTypesense.create_collection(schema)
+
+    assert %ExTypesense.Collection{} = products
+    assert %ExTypesense.Collection{} = collection_companies
+
+    ExTypesense.drop_collection(Product)
+    assert {:error, "Not Found"} === ExTypesense.get_collection(Product)
 
     ExTypesense.drop_collection(schema.name)
     assert {:error, "Not Found"} === ExTypesense.get_collection(schema.name)
   end
 
-  test "error: dropping unknown collection", %{schema: schema} do
-    message = ~s(No collection with name `#{schema.name}` found.)
-    assert {:error, message} === ExTypesense.drop_collection(schema.name)
+  test "success: dropping collection won't affect alias", %{schema: schema} do
+    assert %ExTypesense.Collection{} = ExTypesense.create_collection(Product)
+    assert %ExTypesense.Collection{} = ExTypesense.create_collection(schema)
+
+    assert %{"collection_name" => _collection_name, "name" => alias} =
+             ExTypesense.upsert_collection_alias(schema.name <> "_alias", schema.name)
+
+    ExTypesense.drop_collection(schema.name)
+    ExTypesense.drop_collection(Product)
+
+    assert {:error, "Not Found"} === ExTypesense.get_collection(schema.name)
+    assert {:error, "Not Found"} === ExTypesense.get_collection(Product)
+
+    assert %{"collection_name" => _collection_name, "name" => _alias} =
+             ExTypesense.get_collection_alias(alias)
+  end
+
+  test "error: dropping unknown collection" do
+    collection_name = "unknown"
+    message = ~s(No collection with name `#{collection_name}` found.)
+    assert {:error, message} === ExTypesense.drop_collection(collection_name)
   end
 
   test "success: get specific collection" do
@@ -48,8 +75,8 @@ defmodule CollectionTest do
     ExTypesense.drop_collection(schema.name)
   end
 
-  test "error: get unknown collection", %{schema: schema} do
-    assert {:error, "Not Found"} === ExTypesense.get_collection(schema.name)
+  test "error: get unknown collection" do
+    assert {:error, "Not Found"} === ExTypesense.get_collection("unknown_collection_name")
   end
 
   test "success: update schema fields", %{schema: schema} do
@@ -84,46 +111,35 @@ defmodule CollectionTest do
   end
 
   test "success: list aliases", %{schema: schema} do
-    ExTypesense.upsert_collection_alias(schema.name, schema.name)
-    count = length(ExTypesense.list_collection_aliases())
-    assert count === 1
+    assert %{"collection_name" => _collection_name, "name" => alias} =
+             ExTypesense.upsert_collection_alias(schema.name <> "_alias", schema.name)
 
-    ExTypesense.delete_collection_alias(schema.name)
-  end
+    refute Enum.empty?(ExTypesense.list_collection_aliases())
 
-  test "success: create and delete alias", %{schema: schema} do
-    collection_alias = ExTypesense.upsert_collection_alias(schema.name, schema.name)
-    assert is_map(collection_alias) === true
-    assert Enum.empty?(collection_alias) === false
+    assert %{"collection_name" => _collection_name, "name" => _alias} =
+             ExTypesense.delete_collection_alias(alias)
 
-    ExTypesense.delete_collection_alias(schema.name)
-    assert {:error, "Not Found"} === ExTypesense.get_collection_alias(schema.name)
+    assert Enum.empty?(ExTypesense.list_collection_aliases())
   end
 
-  test "success: get collection name by alias", %{schema: schema} do
-    %{"collection_name" => collection_name, "name" => collection_alias} =
-      ExTypesense.upsert_collection_alias(schema.name, schema.name)
-
-    assert collection_name === ExTypesense.get_collection_name(collection_alias)
-
-    ExTypesense.delete_collection_alias(schema.name)
-  end
+  test "success: create, get, delete alias", %{schema: schema} do
+    assert %{"collection_name" => _collection_name, "name" => alias} =
+             ExTypesense.upsert_collection_alias(schema.name <> "_alias", schema.name)
 
-  test "success: get specific alias", %{schema: schema} do
-    ExTypesense.upsert_collection_alias(schema.name, schema.name)
-    collection_alias = ExTypesense.get_collection_alias(schema.name)
+    assert %{"collection_name" => _collection_name, "name" => alias} =
+             ExTypesense.get_collection_alias(alias)
 
-    assert is_map(collection_alias)
-    assert collection_alias["name"] === schema.name
+    assert %{"collection_name" => _collection_name, "name" => alias} =
+             ExTypesense.delete_collection_alias(alias)
 
-    ExTypesense.delete_collection_alias(schema.name)
+    assert {:error, "Not Found"} === ExTypesense.get_collection_alias(alias)
   end
 
-  test "error: get unknown alias", %{schema: schema} do
-    assert {:error, "Not Found"} === ExTypesense.get_collection_alias(schema.name)
+  test "error: get unknown alias" do
+    assert {:error, "Not Found"} === ExTypesense.get_collection_alias("unknown_alias")
   end
 
-  test "error: delete unknown alias", %{schema: schema} do
-    assert {:error, "Not Found"} === ExTypesense.delete_collection_alias(schema.name)
+  test "error: delete unknown alias" do
+    assert {:error, "Not Found"} === ExTypesense.delete_collection_alias("unknown_alias")
   end
 end
diff --git a/test/document_test.exs b/test/document_test.exs
index 87c9978..4d15c6f 100644
--- a/test/document_test.exs
+++ b/test/document_test.exs
@@ -208,6 +208,35 @@ defmodule DocumentTest do
     assert {:ok, %{"num_deleted" => 1}} == ExTypesense.delete_all_documents(Person)
   end
 
+  test "success: deleting all documents won't drop the collection" do
+    multiple_documents = %{
+      collection_name: "doc_companies",
+      documents: [
+        %{
+          company_name: "Boca Cola",
+          doc_companies_id: 227,
+          country: "SG"
+        },
+        %{
+          company_name: "Motor, Inc.",
+          doc_companies_id: 99,
+          country: "TH"
+        }
+      ]
+    }
+
+    assert {:ok, [%{"success" => true}, %{"success" => true}]} ===
+             ExTypesense.index_multiple_documents(multiple_documents)
+
+    {:ok, %{"num_deleted" => documents_deleted}} =
+      ExTypesense.delete_all_documents(multiple_documents.collection_name)
+
+    assert documents_deleted > 0
+
+    assert %ExTypesense.Collection{name: "doc_companies"} =
+             ExTypesense.get_collection(multiple_documents.collection_name)
+  end
+
   test "success: delete all documents in a collection" do
     multiple_documents = %{
       collection_name: "doc_companies",