fix: TestTest_Parallel adds delay to ensure order (#37890)

Signed-off-by: Max Qian <[email protected]>

Author: rMaxiQp

internal/command/test_test.go

@@ -1256,9 +1256,6 @@ func TestTest_Parallel_Divided_Order(t *testing.T) {
 }
 
 func TestTest_Parallel(t *testing.T) {
-	// Skipped due to flakiness - see https://github.com/hashicorp/terraform/issues/37593
-	t.Skip()
-
 	td := t.TempDir()
 	testCopyDir(t, testFixturePath(path.Join("test", "parallel")), td)
 	t.Chdir(td)

internal/command/testdata/test/parallel/main.tf

@@ -3,7 +3,13 @@ variable "input" {
   type = string
 }
 
+variable "delay" {
+  type = number
+  default = 0
+}
+
 resource "test_resource" "foo" {
+  create_wait_seconds = var.delay
   value = var.input
 }
 

internal/command/testdata/test/parallel/parallel.tftest.hcl

@@ -52,6 +52,7 @@ run "test_a" {
 run "test_b" {
   variables {
     input = run.test_a.value
+    delay = 2 // Simulate a longer run to allow `test_d` to start in parallel
   }
 
   assert {