Add test case to ensure no regression of already fixed crash (#36583)

internal/command/test_test.go

@@ -317,6 +317,11 @@ func TestTest_Runs(t *testing.T) {
 			expectedErr: []string{"Test assertion failed", "resource renamed without moved block"},
 			code:        1,
 		},
+		"unapplyable-plan": {
+			expectedOut: []string{"0 passed, 1 failed."},
+			expectedErr: []string{"Cannot apply non-applyable plan"},
+			code:        1,
+		},
 	}
 	for name, tc := range tcs {
 		t.Run(name, func(t *testing.T) {

internal/command/testdata/test/unapplyable-plan/main.tf

@@ -0,0 +1,8 @@
+
+resource "test_resource" "example" {
+  value = "bar"
+}
+
+output "value" {
+  value = test_resource.example.value
+}

internal/command/testdata/test/unapplyable-plan/main.tftest.hcl

@@ -0,0 +1,11 @@
+
+run "test" {
+  command = apply
+  plan_options {
+    mode = refresh-only
+  }
+  assert {
+    condition = test_resource.example.value == "bar"
+    error_message = "wrong value"
+  }
+}