fix: do not ignore error if request fails (#578)

CHANGELOG.md

@@ -22,6 +22,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
 - Cleanup code and refactor to be more efficient
 - Correct TS types for working with OpenMetrics
 - Updated Typescript and Readme docs for `setToCurrentTime()` to reflect units as seconds.
+- Do not ignore error if request to pushgateway fails
 
 ### Added
 

lib/pushgateway.js

@@ -72,7 +72,13 @@ async function useGateway(method, job, groupings) {
 				body += chunk;
 			});
 			resp.on('end', () => {
-				resolve({ resp, body });
+				if (resp.statusCode >= 400) {
+					reject(
+						new Error(`push failed with status ${resp.statusCode}, ${body}`),
+					);
+				} else {
+					resolve({ resp, body });
+				}
 			});
 		});
 		req.on('error', err => {

test/pushgatewayTest.js

@@ -66,6 +66,19 @@ describe.each([
 						expect(mockHttp.isDone());
 					});
 			});
+
+			it('should throw an error if the push failed', () => {
+				nock('http://192.168.99.100:9091')
+					.post('/metrics/job/testJob/key/value', body)
+					.reply(400);
+
+				return expect(
+					instance.pushAdd({
+						jobName: 'testJob',
+						groupings: { key: 'value' },
+					}),
+				).rejects.toThrow('push failed with status 400');
+			});
 		});
 
 		describe('push', () => {
@@ -88,6 +101,19 @@ describe.each([
 					expect(mockHttp.isDone());
 				});
 			});
+
+			it('should throw an error if the push failed', () => {
+				nock('http://192.168.99.100:9091')
+					.put('/metrics/job/testJob/key/value', body)
+					.reply(400);
+
+				return expect(
+					instance.push({
+						jobName: 'testJob',
+						groupings: { key: 'value' },
+					}),
+				).rejects.toThrow('push failed with status 400');
+			});
 		});
 
 		describe('delete', () => {
@@ -100,6 +126,16 @@ describe.each([
 					expect(mockHttp.isDone());
 				});
 			});
+
+			it('should throw an error if the push failed', () => {
+				nock('http://192.168.99.100:9091')
+					.delete('/metrics/job/testJob')
+					.reply(400);
+
+				return expect(instance.delete({ jobName: 'testJob' })).rejects.toThrow(
+					'push failed with status 400',
+				);
+			});
 		});
 
 		describe('when using basic authentication', () => {