1 files changed, 22 insertions, 0 deletions
diff --git a/isin/isin_test.go b/isin/isin_test.go
new file mode 100644
index 0000000..b7d084d
--- /dev/null
+++ b/isin/isin_test.go
@@ -0,0 +1,22 @@
+package isin
+
+import (
+	"testing"
+
+	"github.com/neonxp/checksum"
+)
+
+func TestISIN(t *testing.T) {
+	samples := map[string]error{
+		"4600051000058": checksum.ErrInvalidChecksum,
+		"?600051000057": checksum.ErrInvalidNumber,
+		"A600051000057": checksum.ErrInvalidChecksum,
+		"4000000000006": nil,
+		"US0378331005":  nil,
+	}
+	for num, result := range samples {
+		if err := Check(num); err != result {
+			t.Errorf("Expected %+v actual %+v for %s", result, err, num)
+		}
+	}
+}