1 files changed, 25 insertions, 0 deletions

diff --git a/cli/internal/lockfile/lockfile_test.go b/cli/internal/lockfile/lockfile_test.go
new file mode 100644
index 0000000..7c666cc
--- /dev/null
+++ b/cli/internal/lockfile/lockfile_test.go
@@ -0,0 +1,25 @@
+package lockfile
+
+import (
+	"sort"
+	"testing"
+
+	"gotest.tools/v3/assert"
+)
+
+func Test_ByKeySortIsStable(t *testing.T) {
+	packagesA := []Package{
+		{"/foo/1.2.3", "1.2.3", true},
+		{"/baz/1.0.9", "/baz/1.0.9", true},
+		{"/bar/1.2.3", "1.2.3", true},
+		{"/foo/1.2.3", "/foo/1.2.3", true},
+		{"/baz/1.0.9", "1.0.9", true},
+	}
+	packagesB := make([]Package, len(packagesA))
+	copy(packagesB, packagesA)
+
+	sort.Sort(ByKey(packagesA))
+	sort.Sort(ByKey(packagesB))
+
+	assert.DeepEqual(t, packagesA, packagesB)
+}