apollo_dashboard: add new module queries_builder

Author: matanl-starkware

crates/apollo_dashboard/src/lib.rs

@@ -6,3 +6,7 @@ pub mod dashboard_definitions;
 #[cfg(test)]
 mod metric_definitions_test;
 mod panels;
+
+// TODO(MatanL): Remove cfg(test) when used
+#[cfg(test)]
+mod query_builder;

crates/apollo_dashboard/src/query_builder.rs

@@ -0,0 +1,9 @@
+use apollo_metrics::metrics::MetricCommon;
+
+#[cfg(test)]
+#[path = "query_builder_test.rs"]
+pub mod query_builder_test;
+
+pub(crate) fn increase(metric: &dyn MetricCommon, duration: &str) -> String {
+    format!("increase({}[{}])", metric.get_name_with_filter(), duration)
+}

crates/apollo_dashboard/src/query_builder_test.rs

@@ -0,0 +1,14 @@
+use apollo_infra_utils::template::Template;
+use apollo_metrics::metric_label_filter;
+use apollo_metrics::metrics::{MetricGauge, MetricScope};
+
+use crate::query_builder;
+
+#[test]
+fn increase_formats_correctly() {
+    let m = MetricGauge::new(MetricScope::Batcher, "testing", "Fake description");
+    let q = query_builder::increase(&m, "5m");
+    let expected =
+        Template::new("increase({}{}[{}])").format(&[&"testing", &metric_label_filter!(), &"5m"]);
+    assert_eq!(q, expected);
+}