terraform: more destroy edge tests

terraform/test-fixtures/transform-destroy-edge-multi/main.tf

@@ -0,0 +1,3 @@
+resource "test" "A" {}
+resource "test" "B" { value = "${test.A.value}" }
+resource "test" "C" { value = "${test.B.value}" }

terraform/transform_destroy_edge_test.go

@@ -23,6 +23,25 @@ func TestDestroyEdgeTransformer(t *testing.T) {
 	}
 }
 
+func TestDestroyEdgeTransformer_multi(t *testing.T) {
+	g := Graph{Path: RootModulePath}
+	g.Add(&graphNodeDestroyerTest{AddrString: "test.A"})
+	g.Add(&graphNodeDestroyerTest{AddrString: "test.B"})
+	g.Add(&graphNodeDestroyerTest{AddrString: "test.C"})
+	tf := &DestroyEdgeTransformer{
+		Module: testModule(t, "transform-destroy-edge-multi"),
+	}
+	if err := tf.Transform(&g); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	actual := strings.TrimSpace(g.String())
+	expected := strings.TrimSpace(testTransformDestroyEdgeMultiStr)
+	if actual != expected {
+		t.Fatalf("bad:\n\n%s", actual)
+	}
+}
+
 type graphNodeDestroyerTest struct {
 	AddrString string
 }
@@ -42,3 +61,11 @@ test.A (destroy)
   test.B (destroy)
 test.B (destroy)
 `
+
+const testTransformDestroyEdgeMultiStr = `
+test.A (destroy)
+  test.B (destroy)
+test.B (destroy)
+  test.C (destroy)
+test.C (destroy)
+`