test: add inbox command integration coverage

internal/cli/inbox/test_helpers_test.go

@@ -0,0 +1,78 @@
+package inbox
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+)
+
+func runInboxCommand(t *testing.T, args ...string) string {
+	t.Helper()
+
+	stdout, stderr, exitCode := executeInboxCommand(args...)
+	if exitCode != 0 {
+		t.Fatalf("execute inbox command %v: exit=%d\nstderr:\n%s\nstdout:\n%s", args, exitCode, stderr, stdout)
+	}
+
+	return stdout
+}
+
+func executeInboxCommand(args ...string) (string, string, int) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	exitCode := Execute(args, &stdout, &stderr)
+	return stdout.String(), stderr.String(), exitCode
+}
+
+func mustDecodeJSON(t *testing.T, raw string, target any) {
+	t.Helper()
+
+	if err := json.Unmarshal([]byte(raw), target); err != nil {
+		t.Fatalf("decode json %q: %v", raw, err)
+	}
+}
+
+func nestedString(t *testing.T, value map[string]any, keys ...string) string {
+	t.Helper()
+
+	current := nestedValue(t, value, keys...)
+	str, ok := current.(string)
+	if !ok {
+		t.Fatalf("expected string at %v, got %#v", keys, current)
+	}
+	return str
+}
+
+func nestedValue(t *testing.T, value map[string]any, keys ...string) any {
+	t.Helper()
+
+	var current any = value
+	for _, key := range keys {
+		obj, ok := current.(map[string]any)
+		if !ok {
+			t.Fatalf("expected object at %q in %v, got %#v", key, keys, current)
+		}
+		current, ok = obj[key]
+		if !ok {
+			t.Fatalf("missing key %q in %v", key, keys)
+		}
+	}
+	return current
+}
+
+func assertErrorJSON(t *testing.T, raw string, expectedCode string) {
+	t.Helper()
+
+	var payload map[string]any
+	mustDecodeJSON(t, raw, &payload)
+	if ok, _ := payload["ok"].(bool); ok {
+		t.Fatalf("expected ok=false error payload, got %#v", payload)
+	}
+	errorValue, ok := payload["error"].(map[string]any)
+	if !ok {
+		t.Fatalf("expected error object, got %#v", payload["error"])
+	}
+	if code, _ := errorValue["code"].(string); code != expectedCode {
+		t.Fatalf("expected error code %q, got %#v", expectedCode, errorValue["code"])
+	}
+}