Add test adapter and interpolate secrets in integration tests

test/integration/docker/deployer/app/.kamal/secrets

@@ -1,2 +1,5 @@
 SECRET_TOKEN='1234 with "中文"'
 SECRET_TAG='TAGME'
+SECRETS=$(kamal secrets fetch --adapter test --account test INTERPOLATED_SECRET1 INTERPOLATED_SECRET2)
+INTERPOLATED_SECRET1=$(kamal secrets extract INTERPOLATED_SECRET1 ${SECRETS})
+INTERPOLATED_SECRET2=$(kamal secrets extract INTERPOLATED_SECRET2 ${SECRETS})

test/integration/docker/deployer/app/config/deploy.yml

@@ -10,6 +10,8 @@ env:
     HOST_TOKEN: "${HOST_TOKEN}"
   secret:
     - SECRET_TOKEN
+    - INTERPOLATED_SECRET1
+    - INTERPOLATED_SECRET2
   tags:
     tag1:
       CLEAR_TAG: tagged

test/integration/main_test.rb

@@ -102,7 +102,7 @@ class MainTest < IntegrationTest
   end
 
   private
-  def assert_envs(version:)
+    def assert_envs(version:)
       assert_env :CLEAR_TOKEN, "4321", version: version, vm: :vm1
       assert_env :HOST_TOKEN, "abcd", version: version, vm: :vm1
       assert_env :SECRET_TOKEN, "1234 with \"中文\"", version: version, vm: :vm1
@@ -110,6 +110,8 @@ class MainTest < IntegrationTest
       assert_no_env :SECRET_TAG, version: version, vm: :vm1
       assert_env :CLEAR_TAG, "tagged", version: version, vm: :vm2
       assert_env :SECRET_TAG, "TAGME", version: version, vm: :vm2
+      assert_env :INTERPOLATED_SECRET1, "1TERCES_DETALOPRETNI", version: version, vm: :vm2
+      assert_env :INTERPOLATED_SECRET2, "2TERCES_DETALOPRETNI", version: version, vm: :vm2
     end
 
     def assert_env(key, value, vm:, version:)