feat(loki.push): allow any Iterable values (such as Generator)

docs/Loki.md

@@ -222,7 +222,7 @@ async series<T = Record<string, string>>(
 ): Promise<T[]>
 ```
 
-### push(logs: LokiIngestLogs): Promise< void >
+### push(logs: Iterable< LokiIngestLogs >): Promise< void >
 Send log entries to Loki.
 
 ```ts

src/class/Loki.class.ts

@@ -237,12 +237,16 @@ export class Loki {
     return listSeries.status === "success" ? listSeries.data : [];
   }
 
-  async push(logs: LokiIngestLogs[]): Promise<void> {
+  async push(
+    logs: Iterable<LokiIngestLogs>
+  ): Promise<void> {
     const uri = new URL("loki/api/v1/push", this.remoteApiURL);
     const { headers } = this.credential.httpOptions;
 
     await httpie.post(uri, {
-      body: { streams: logs },
+      body: {
+        streams: Array.from(logs)
+      },
       headers: {
         ...headers,
         "Content-Type": "application/json"

test/Loki.spec.ts

@@ -366,7 +366,30 @@ describe("GrafanaApi.Loki", () => {
         }).reply(204);
 
       const sdk = new GrafanaApi({ remoteApiURL: kDummyURL });
-      await assert.doesNotReject(async() => await sdk.Loki.push(dummyLogs));
+      await assert.doesNotReject(
+        async() => await sdk.Loki.push(dummyLogs)
+      );
+    });
+
+    it("should call POST /loki/api/v1/push with the provided logs (but with an Iterable)", async() => {
+      function* gen(): IterableIterator<LokiIngestLogs> {
+        yield {
+          stream: { app: "foo" },
+          values: [["173532887432100000", "hello world"]]
+        };
+      }
+
+      const agentPoolInterceptor = kMockAgent.get(kDummyURL);
+      agentPoolInterceptor
+        .intercept({
+          path: (path) => path.includes("loki/api/v1/push"),
+          method: "POST"
+        }).reply(204);
+
+      const sdk = new GrafanaApi({ remoteApiURL: kDummyURL });
+      await assert.doesNotReject(
+        async() => await sdk.Loki.push(gen())
+      );
     });
   });
 });