[ci][elixir] check if formatting is valid

.github/workflows/samples-elixir.yaml

@@ -31,9 +31,12 @@ jobs:
         with:
           otp-version: ${{matrix.otp}}
           elixir-version: ${{matrix.elixir}}
-      - name: mix deps.get 
+      - name: mix deps.get
         run: mix deps.get
         working-directory: ${{ matrix.sample }}
+      - name: mix test
+        run: mix format --check-formatted
+        working-directory: ${{ matrix.sample }}
       - name: mix test
         run: mix test
         working-directory: ${{ matrix.sample }}

samples/client/petstore/elixir/lib/openapi_petstore/api/another_fake.ex

@@ -24,7 +24,11 @@ defmodule OpenapiPetstore.Api.AnotherFake do
   - `{:ok, OpenapiPetstore.Model.Client.t}` on success
   - `{:error, Tesla.Env.t}` on failure
   """
-  @spec call_123_test_special_tags(Tesla.Env.client, OpenapiPetstore.Model.Client.t, keyword()) :: {:ok, OpenapiPetstore.Model.Client.t} | {:error, Tesla.Env.t}
+  @spec call_123_test_special_tags(
+          Tesla.Env.client(),
+          OpenapiPetstore.Model.Client.t(),
+          keyword()
+        ) :: {:ok, OpenapiPetstore.Model.Client.t()} | {:error, Tesla.Env.t()}
   def call_123_test_special_tags(connection, client, _opts \\ []) do
     request =
       %{}

samples/client/petstore/elixir/lib/openapi_petstore/api/default.ex

@@ -21,7 +21,8 @@ defmodule OpenapiPetstore.Api.Default do
   - `{:ok, OpenapiPetstore.Model.FooGetDefaultResponse.t}` on success
   - `{:error, Tesla.Env.t}` on failure
   """
-  @spec foo_get(Tesla.Env.client, keyword()) :: {:ok, OpenapiPetstore.Model.FooGetDefaultResponse.t} | {:error, Tesla.Env.t}
+  @spec foo_get(Tesla.Env.client(), keyword()) ::
+          {:ok, OpenapiPetstore.Model.FooGetDefaultResponse.t()} | {:error, Tesla.Env.t()}
   def foo_get(connection, _opts \\ []) do
     request =
       %{}