Iam resolver initial commit (#15358)

Co-authored-by: Zhenhua Li <[email protected]>

Author: hao-nan-li

mmv1/third_party/tgc_next/pkg/tfplan2cai/convert.go

@@ -33,12 +33,15 @@ func Convert(ctx context.Context, jsonPlan []byte, o *Options) ([]caiasset.Asset
 		return nil, fmt.Errorf("logger is not initialized")
 	}
 
+	// IAM resource resolver, do not run until IAM resources included
+	resolvers.NewIamAdvancedResolver(o.ErrorLogger).Resolve(jsonPlan)
 	resourceDataMap := resolvers.NewDefaultPreResolver(o.ErrorLogger).Resolve(jsonPlan)
 
-	// TODO: add advanced resolvers for resources
+	// TODO: add remaining advanced resolvers for resources
 
 	// Set up config and ancestry manager using the same user agent.
 	// Config and ancestry manager are shared among resources.
+
 	cfg, err := transport.NewConfig(ctx, o.DefaultProject, o.DefaultZone, o.DefaultRegion, o.Offline, o.UserAgent)
 	if err != nil {
 		return nil, fmt.Errorf("building config: %w", err)

mmv1/third_party/tgc_next/pkg/tfplan2cai/resolvers/convert_test.go

@@ -0,0 +1,27 @@
+package resolvers
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.uber.org/zap"
+)
+
+func TestConvert_iamBinding(t *testing.T) {
+	logger, err := zap.NewDevelopment()
+	if err != nil {
+		t.Fatalf("Error initializing logger %s", err)
+	}
+	f := "iamBinding.tfplan.json"
+	jsonPlan, err := os.ReadFile(f)
+	if err != nil {
+		t.Fatalf("Error parsing %s: %s", f, err)
+	}
+
+	idToResourceChangeMap := NewIamAdvancedResolver(logger).Resolve(jsonPlan)
+
+	assert.Equal(t, 1, len(idToResourceChangeMap), "Expected map size is 1")
+	assert.Equal(t, 2, len(idToResourceChangeMap["instance_name/google_compute_instance.tgc-iam.name/project/terraform-dev-zhenhuali/zone/us-central1-a/"]), "Expected iam list to be size 2")
+	assert.Equal(t, 0, len(idToResourceChangeMap["google_compute_instance_iam_member.foo1"]), "Expected this key to return null")
+}