1 files changed, 73 insertions, 0 deletions
diff --git a/internal/role/role_test.go b/internal/role/role_test.go
new file mode 100644
index 0000000..6d2294e
--- /dev/null
+++ b/internal/role/role_test.go
@@ -0,0 +1,73 @@
+package role
+
+import (
+	"encoding/json"
+	"reflect"
+	"testing"
+)
+
+func TestRoleConfig_JSONRoundTrip(t *testing.T) {
+	rc := RoleConfig{
+		Role:             "coder",
+		SystemPrompt:     "You are a careful coding agent.",
+		Tools:            []string{"Bash", "Read", "Edit"},
+		SandboxKind:      "docker",
+		DefaultBudgetUSD: 1.5,
+		EscalationLadder: []Tier{
+			{
+				Candidates: []Rung{
+					{Provider: "local", Model: "llama3.1:8b"},
+				},
+				SelectionMode: "single",
+				MaxRetries:    2,
+			},
+			{
+				Candidates: []Rung{
+					{Provider: "groq", Model: "llama-3.3-70b-versatile"},
+					{Provider: "openrouter", Model: "meta-llama/llama-3.3-70b-instruct:free"},
+				},
+				SelectionMode: "round_robin",
+				MaxRetries:    1,
+			},
+			{
+				Candidates: []Rung{
+					{Provider: "anthropic", Model: "claude-sonnet-5"},
+				},
+				MaxRetries: 0,
+			},
+		},
+	}
+
+	b, err := json.Marshal(rc)
+	if err != nil {
+		t.Fatalf("Marshal: %v", err)
+	}
+
+	var got RoleConfig
+	if err := json.Unmarshal(b, &got); err != nil {
+		t.Fatalf("Unmarshal: %v", err)
+	}
+
+	if !reflect.DeepEqual(rc, got) {
+		t.Errorf("round trip mismatch:\n  want: %+v\n  got:  %+v", rc, got)
+	}
+}
+
+func TestTier_EffectiveSelectionMode(t *testing.T) {
+	cases := []struct {
+		name string
+		tier Tier
+		want string
+	}{
+		{"empty defaults to round_robin", Tier{}, "round_robin"},
+		{"explicit single", Tier{SelectionMode: "single"}, "single"},
+		{"explicit round_robin", Tier{SelectionMode: "round_robin"}, "round_robin"},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			if got := c.tier.EffectiveSelectionMode(); got != c.want {
+				t.Errorf("got %q, want %q", got, c.want)
+			}
+		})
+	}
+}