add unit tests

cmd/baton-aws/config.go

@@ -9,6 +9,12 @@ import (
 	"github.com/spf13/viper"
 )
 
+const (
+	ExternalIDLengthMaximum = 65 // TODO(marcos): this might be a bug.
+	ExternalIDLengthMinimum = 32
+	RegionDefault           = "us-east-1"
+)
+
 var (
 	ExternalIdField = field.StringField(
 		"external-id",
@@ -29,7 +35,7 @@ var (
 	GlobalAwsSsoRegionField = field.StringField(
 		"global-aws-sso-region",
 		field.WithDescription("The region for the sso identities"),
-		field.WithDefaultValue("us-east-1"),
+		field.WithDefaultValue(RegionDefault),
 	)
 	GlobalBindingExternalIdField = field.StringField(
 		"global-binding-external-id",
@@ -103,7 +109,7 @@ func ValidateExternalId(input string) error {
 		return fmt.Errorf("external id is missing")
 	}
 
-	if fieldLength < 32 || fieldLength > 65 {
+	if fieldLength < ExternalIDLengthMinimum || fieldLength > ExternalIDLengthMaximum {
 		return fmt.Errorf("aws_external_id must be between 32 and 64 bytes")
 	}
 	return nil

cmd/baton-aws/config_test.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/conductorone/baton-sdk/pkg/test"
+	"github.com/conductorone/baton-sdk/pkg/ustrings"
+	"github.com/spf13/viper"
+)
+
+const (
+	exampleARN        = "arn:aws:iam::123456789012:role/David"
+	exampleExternalID = "12345678901234567890123456789012"
+	s3ARN             = "arn:aws:s3:::my_corporate_bucket/exampleobject.png"
+)
+
+func TestConfigs(t *testing.T) {
+	ctx := context.Background()
+	test.ExerciseTestCasesFromExpressions(
+		t,
+		Configuration,
+		func(viper *viper.Viper) error { return validateConfig(ctx, viper) },
+		ustrings.ParseFlags,
+		[]test.TestCaseFromExpression{
+			{
+				"",
+				true,
+				"empty",
+			},
+			{
+				"--use-assume",
+				false,
+				"externalID + ARN missing",
+			},
+			{
+				fmt.Sprintf("--use-assume --external-id %s", exampleExternalID),
+				false,
+				"ARN missing",
+			},
+			{
+				fmt.Sprintf("--use-assume --role-arn %s", exampleARN),
+				false,
+				"external ID missing",
+			},
+			{
+				fmt.Sprintf("--use-assume --external-id 1 --role-arn %s", exampleARN),
+				false,
+				"externalID too short",
+			},
+			{
+
+				fmt.Sprintf(
+					"--use-assume --external-id %s --role-arn %s",
+					exampleExternalID,
+					s3ARN,
+				),
+				false,
+				"ARN is not IAM",
+			},
+			{
+				fmt.Sprintf(
+					"--use-assume --external-id %s --role-arn %s",
+					exampleExternalID,
+					exampleARN,
+				),
+				true,
+				"all",
+			},
+		},
+	)
+}