1 files changed, 37 insertions, 0 deletions
diff --git a/hst/grp_pwd_test.go b/hst/grp_pwd_test.go
new file mode 100644
index 00000000..2d01c122
--- /dev/null
+++ b/hst/grp_pwd_test.go
@@ -0,0 +1,37 @@
+package hst_test
+
+import (
+	"strconv"
+	"testing"
+
+	"hakurei.app/hst"
+)
+
+func TestUIDString(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		val  uint32
+		want string
+	}{
+		{hst.AppStart + hst.IdentityStart, "u0_a0"},                           // uidStart
+		{hst.ToUser[uint32](hst.RangeSize-1, hst.IdentityEnd), "u9999_a9999"}, // uidEnd
+
+		{hst.IsolatedStart + hst.IdentityStart, "u0_i0"},                    // isolatedStart
+		{(hst.RangeSize-1)*hst.UserOffset + hst.IsolatedEnd, "u9999_i9999"}, // isolatedEnd
+
+		{0, "0"}, // out of bounds
+	}
+	for _, tc := range testCases {
+		t.Run(strconv.Itoa(int(tc.val)), func(t *testing.T) {
+			t.Parallel()
+
+			if got := hst.UID(tc.val).String(); got != tc.want {
+				t.Fatalf("UID.String: %q, want %q", got, tc.want)
+			}
+			if got := hst.GID(tc.val).String(); got != tc.want {
+				t.Fatalf("GID.String: %q, want %q", got, tc.want)
+			}
+		})
+	}
+}