test: add bsonutil package tests for IDToBsonBinary, BsonBinaryToID, NewIDBsonBinary

Author: retran

mdl/bsonutil/bsonutil_test.go

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package bsonutil
+
+import (
+	"testing"
+
+	"github.com/mendixlabs/mxcli/mdl/types"
+)
+
+func TestIDToBsonBinary_ValidUUID(t *testing.T) {
+	id := "550e8400-e29b-41d4-a716-446655440000"
+	bin := IDToBsonBinary(id)
+
+	if bin.Subtype != 0x00 {
+		t.Errorf("expected subtype 0x00, got 0x%02x", bin.Subtype)
+	}
+	if len(bin.Data) != 16 {
+		t.Errorf("expected 16 bytes, got %d", len(bin.Data))
+	}
+}
+
+func TestIDToBsonBinary_PanicsOnInvalidUUID(t *testing.T) {
+	defer func() {
+		if r := recover(); r == nil {
+			t.Error("expected panic on invalid UUID, got none")
+		}
+	}()
+	IDToBsonBinary("not-a-uuid")
+}
+
+func TestIDToBsonBinary_PanicsOnEmptyString(t *testing.T) {
+	defer func() {
+		if r := recover(); r == nil {
+			t.Error("expected panic on empty string, got none")
+		}
+	}()
+	IDToBsonBinary("")
+}
+
+func TestBsonBinaryToID_Roundtrip(t *testing.T) {
+	id := "550e8400-e29b-41d4-a716-446655440000"
+	bin := IDToBsonBinary(id)
+	got := BsonBinaryToID(bin)
+	if got != id {
+		t.Errorf("roundtrip failed: got %q, want %q", got, id)
+	}
+}
+
+func TestNewIDBsonBinary_ProducesValidUUID(t *testing.T) {
+	bin := NewIDBsonBinary()
+	if bin.Subtype != 0x00 {
+		t.Errorf("expected subtype 0x00, got 0x%02x", bin.Subtype)
+	}
+	if len(bin.Data) != 16 {
+		t.Errorf("expected 16 bytes, got %d", len(bin.Data))
+	}
+
+	// Convert back and validate UUID format
+	id := BsonBinaryToID(bin)
+	if !types.ValidateID(id) {
+		t.Errorf("generated ID is not valid UUID format: %q", id)
+	}
+}
+
+func TestNewIDBsonBinary_Uniqueness(t *testing.T) {
+	seen := make(map[string]bool)
+	for i := 0; i < 100; i++ {
+		id := BsonBinaryToID(NewIDBsonBinary())
+		if seen[id] {
+			t.Fatalf("duplicate ID generated: %q", id)
+		}
+		seen[id] = true
+	}
+}