Expose test API for counters over Ffi

glean-core/android/src/main/java/mozilla/telemetry/glean/rust/LibGleanFFI.kt

@@ -36,14 +36,16 @@ internal interface LibGleanFFI : Library {
 
     fun glean_counter_add(glean_handle: Long, metric_id: Long, amount: Long, error: RustError.ByReference)
 
+    fun glean_counter_test_get_value(glean_handle: Long, metric_id: Long, storage_name: String): Long
+
+    fun glean_counter_test_has_value(glean_handle: Long, metric_id: Long, storage_name: String): Byte
+
     fun glean_initialize(data_dir: String, application_id: String): Long
 
     fun glean_is_initialized(glean_handle: Long): Byte
 
     fun glean_is_upload_enabled(glean_handle: Long): Byte
 
-    fun glean_send_ping(glean_handle: Long, ping_name: String)
-
     fun glean_new_boolean_metric(category: String, name: String, send_in_pings: StringArray, send_in_pings_len: Int, lifetime: Int, err: RustError.ByReference): Long
 
     fun glean_new_counter_metric(category: String, name: String, send_in_pings: StringArray, send_in_pings_len: Int, lifetime: Int, err: RustError.ByReference): Long
@@ -52,6 +54,8 @@ internal interface LibGleanFFI : Library {
 
     fun glean_ping_collect(glean_handle: Long, ping_name: String, error: RustError.ByReference): Pointer?
 
+    fun glean_send_ping(glean_handle: Long, ping_name: String)
+
     fun glean_set_upload_enabled(glean_handle: Long, flag: Byte)
 
     fun glean_string_set(glean_handle: Long, metric_id: Long, value: String, error: RustError.ByReference)

glean-core/ffi/examples/glean.h

@@ -168,14 +168,20 @@ void glean_counter_add(uint64_t glean_handle,
                        uint64_t amount,
                        ExternError *error);
 
+uint64_t glean_counter_test_get_value(uint64_t glean_handle,
+                                      uint64_t metric_id,
+                                      FfiStr storage_name);
+
+uint8_t glean_counter_test_has_value(uint64_t glean_handle,
+                                     uint64_t metric_id,
+                                     FfiStr storage_name);
+
 uint64_t glean_initialize(FfiStr data_dir, FfiStr application_id);
 
 uint8_t glean_is_initialized(uint64_t glean_handle);
 
 uint8_t glean_is_upload_enabled(uint64_t glean_handle);
 
-void glean_send_ping(uint64_t glean_handle, FfiStr ping_name);
-
 uint64_t glean_new_boolean_metric(FfiStr category,
                                   FfiStr name,
                                   RawStringArray send_in_pings,
@@ -199,6 +205,8 @@ uint64_t glean_new_string_metric(FfiStr category,
 
 char *glean_ping_collect(uint64_t glean_handle, FfiStr ping_name, ExternError *error);
 
+void glean_send_ping(uint64_t glean_handle, FfiStr ping_name);
+
 void glean_set_upload_enabled(uint64_t glean_handle, uint8_t flag);
 
 void glean_string_set(uint64_t glean_handle, uint64_t metric_id, FfiStr value, ExternError *error);

glean-core/ffi/src/lib.rs

@@ -191,6 +191,38 @@ pub extern "C" fn glean_counter_add(
     })
 }
 
+#[no_mangle]
+pub extern "C" fn glean_counter_test_has_value(
+    glean_handle: u64,
+    metric_id: u64,
+    storage_name: FfiStr,
+) -> u8 {
+    let mut err = ExternError::success();
+    GLEAN.call_with_output(&mut err, glean_handle, |glean| {
+        let mut err = ExternError::success();
+        COUNTER_METRICS.call_with_output(&mut err, metric_id, |metric| {
+            metric
+                .test_get_value(glean, storage_name.as_str())
+                .is_none()
+        })
+    })
+}
+
+#[no_mangle]
+pub extern "C" fn glean_counter_test_get_value(
+    glean_handle: u64,
+    metric_id: u64,
+    storage_name: FfiStr,
+) -> u64 {
+    let mut err = ExternError::success();
+    GLEAN.call_with_output(&mut err, glean_handle, |glean| {
+        let mut err = ExternError::success();
+        COUNTER_METRICS.call_with_output(&mut err, metric_id, |metric| {
+            metric.test_get_value(glean, storage_name.as_str()).unwrap()
+        })
+    })
+}
+
 #[no_mangle]
 pub extern "C" fn glean_boolean_set(
     glean_handle: u64,