| 33 | } |
| 34 | |
| 35 | func Test_Proxy_RequestsForwarding(t *testing.T) { |
| 36 | const ( |
| 37 | querySingleMetric1 = `{"status":"success","data":{"resultType":"vector","result":[{"metric":{"__name__":"cortex_build_info"},"value":[1583320883,"1"]}]}}` |
| 38 | querySingleMetric2 = `{"status":"success","data":{"resultType":"vector","result":[{"metric":{"__name__":"cortex_build_info"},"value":[1583320883,"2"]}]}}` |
| 39 | ) |
| 40 | |
| 41 | type mockedBackend struct { |
| 42 | pathPrefix string |
| 43 | handler http.HandlerFunc |
| 44 | } |
| 45 | |
| 46 | tests := map[string]struct { |
| 47 | backends []mockedBackend |
| 48 | preferredBackendIdx int |
| 49 | expectedStatus int |
| 50 | expectedRes string |
| 51 | }{ |
| 52 | "one backend returning 2xx": { |
| 53 | backends: []mockedBackend{ |
| 54 | {handler: mockQueryResponse("/api/v1/query", 200, querySingleMetric1)}, |
| 55 | }, |
| 56 | expectedStatus: 200, |
| 57 | expectedRes: querySingleMetric1, |
| 58 | }, |
| 59 | "one backend returning 5xx": { |
| 60 | backends: []mockedBackend{ |
| 61 | {handler: mockQueryResponse("/api/v1/query", 500, "")}, |
| 62 | }, |
| 63 | expectedStatus: 500, |
| 64 | expectedRes: "", |
| 65 | }, |
| 66 | "two backends without path prefix": { |
| 67 | backends: []mockedBackend{ |
| 68 | {handler: mockQueryResponse("/api/v1/query", 200, querySingleMetric1)}, |
| 69 | {handler: mockQueryResponse("/api/v1/query", 200, querySingleMetric2)}, |
| 70 | }, |
| 71 | preferredBackendIdx: 0, |
| 72 | expectedStatus: 200, |
| 73 | expectedRes: querySingleMetric1, |
| 74 | }, |
| 75 | "two backends with the same path prefix": { |
| 76 | backends: []mockedBackend{ |
| 77 | { |
| 78 | pathPrefix: "/api/prom", |
| 79 | handler: mockQueryResponse("/api/prom/api/v1/query", 200, querySingleMetric1), |
| 80 | }, |
| 81 | { |
| 82 | pathPrefix: "/api/prom", |
| 83 | handler: mockQueryResponse("/api/prom/api/v1/query", 200, querySingleMetric2), |
| 84 | }, |
| 85 | }, |
| 86 | preferredBackendIdx: 0, |
| 87 | expectedStatus: 200, |
| 88 | expectedRes: querySingleMetric1, |
| 89 | }, |
| 90 | "two backends with different path prefix": { |
| 91 | backends: []mockedBackend{ |
| 92 | { |