add test to FmpClientTes

Author: Szkkhh

src/test/java/com/marketdataapi/fmp4j/FmpClientTest.java

@@ -757,6 +757,20 @@ void keyMetrics(String p) {
         assertValidResult(result, limit.value(), FmpKeyMetric.class);
     }
 
+    @Test
+    void key_metrics_ttm_bulk() {
+        // given
+        var endpoint = "key-metrics-ttm-bulk";
+        var file = format("stable/%s/.csv", endpoint);
+
+        // when
+        mockHttpGetFromFile(file);
+        var result = fmpClient.bulk().keyMetricsTtm();
+
+        // then
+        assertValidResult(result, 2, FmpKeyMetricTtm.class);
+    }
+
     @Test
     void key_metrics_ttm() {
         // given