Add tests for 'allow_extension_operations'

Signed-off-by: philthoennissen <pth@cloudeteer.de>

tests/local/input_vm_extension.tftest.hcl

@@ -0,0 +1,31 @@
+mock_provider "azapi" { source = "tests/local/mocks" }
+mock_provider "azurerm" { source = "tests/local/mocks" }
+mock_provider "random" { source = "tests/local/mocks" }
+mock_provider "tls" { source = "tests/local/mocks" }
+
+run "no_extension_should_be_created" {
+  command = plan
+
+  variables {
+    allow_extension_operations = false
+    extensions = []
+  }
+
+  assert {
+    condition = length(azurerm_virtual_machine_extension.this) == 0
+    error_message = "It is not possible to install extension with 'allow_extension_operations = false'. The azurerm_virtual_machine_extension.this length is ${length(azurerm_virtual_machine_extension.this)}."
+  }
+}
+
+run "no_extension_should_be_created_2" {
+  command = plan
+
+  variables {
+    allow_extension_operations = false
+  }
+
+  assert {
+    condition = length(azurerm_virtual_machine_extension.this) == 0
+    error_message = "It is not possible to install extension with 'allow_extension_operations = false'. The azurerm_virtual_machine_extension.this length is ${length(azurerm_virtual_machine_extension.this)}."
+  }
+}