test_cashu (10/10) + test_session (18/18): all 86 unit tests passing

- Expand esp_http_client.h stub: full config struct + method enum + init/perform/cleanup
- Add portTICK_PERIOD_MS + esp_err_to_name to stubs
- session.c: reject duplicate spent secrets in session_create (double-spend protection)
- .gitignore: add test binaries

1 files changed, 2 insertions, 0 deletions

diff --git a/tests/unit/stubs/esp_err.h b/tests/unit/stubs/esp_err.h
index 84c3734..9bedb72 100644
--- a/tests/unit/stubs/esp_err.h
+++ b/tests/unit/stubs/esp_err.h
@@ -13,6 +13,8 @@ typedef int esp_err_t;
 #define ESP_ERR_NO_MEM       0x101
 #define ESP_ERR_NOT_FOUND    0x104
 
+static inline const char *esp_err_to_name(esp_err_t err) { (void)err; return "ESP_OK"; }
+
 #define ESP_ERROR_CHECK(x) do { if ((x) != 0) { fprintf(stderr, "ESP_ERROR_CHECK failed: 0x%x\n", (int)(x)); abort(); } } while(0)
 
 #endif