Prometheus: Introduce prometheus backend library (#83952)

* Move files to prometheus-library * refactor core prometheus to use prometheus-library * modify client transport options * mock * have a type * import aliases * rename * call the right method * remove unrelated test from the library * update codeowners * go work sync * update go.work.sum * make swagger-clean && make openapi3-gen * add promlib to makefile * remove clilogger * Export the function * update unit test * add prometheus_test.go * fix mock type * use mapUtil from grafana-plugin-sdk-go
2024-03-11 17:22:33 +01:00
parent cfc7ea92da
commit 3fb6319d1b
114 changed files with 672 additions and 340 deletions
@@ -0,0 +1,58 @@
+package querydata
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/grafana/grafana/pkg/promlib/models"
+	"github.com/grafana/grafana/pkg/promlib/querydata/exemplar"
+)
+
+func TestQueryData_parseResponse(t *testing.T) {
+	qd := QueryData{exemplarSampler: exemplar.NewStandardDeviationSampler}
+
+	t.Run("resultType is before result the field must parsed normally", func(t *testing.T) {
+		resBody := `{"data":{"resultType":"vector", "result":[{"metric":{"__name__":"some_name","environment":"some_env","id":"some_id","instance":"some_instance:1234","job":"some_job","name":"another_name","region":"some_region"},"value":[1.1,"2"]}]},"status":"success"}`
+		res := &http.Response{Body: io.NopCloser(bytes.NewBufferString(resBody))}
+		result := qd.parseResponse(context.Background(), &models.Query{}, res, false)
+		assert.Nil(t, result.Error)
+		assert.Len(t, result.Frames, 1)
+	})
+
+	t.Run("resultType is after the result field must parsed normally", func(t *testing.T) {
+		resBody := `{"data":{"result":[{"metric":{"__name__":"some_name","environment":"some_env","id":"some_id","instance":"some_instance:1234","job":"some_job","name":"another_name","region":"some_region"},"value":[1.1,"2"]}],"resultType":"vector"},"status":"success"}`
+		res := &http.Response{Body: io.NopCloser(bytes.NewBufferString(resBody))}
+		result := qd.parseResponse(context.Background(), &models.Query{}, res, false)
+		assert.Nil(t, result.Error)
+		assert.Len(t, result.Frames, 1)
+	})
+
+	t.Run("no resultType is existed in the data", func(t *testing.T) {
+		resBody := `{"data":{"result":[{"metric":{"__name__":"some_name","environment":"some_env","id":"some_id","instance":"some_instance:1234","job":"some_job","name":"another_name","region":"some_region"},"value":[1.1,"2"]}]},"status":"success"}`
+		res := &http.Response{Body: io.NopCloser(bytes.NewBufferString(resBody))}
+		result := qd.parseResponse(context.Background(), &models.Query{}, res, false)
+		assert.Error(t, result.Error)
+		assert.Equal(t, result.Error.Error(), "no resultType found")
+	})
+
+	t.Run("resultType is set as empty string before result", func(t *testing.T) {
+		resBody := `{"data":{"resultType":"", "result":[{"metric":{"__name__":"some_name","environment":"some_env","id":"some_id","instance":"some_instance:1234","job":"some_job","name":"another_name","region":"some_region"},"value":[1.1,"2"]}]},"status":"success"}`
+		res := &http.Response{Body: io.NopCloser(bytes.NewBufferString(resBody))}
+		result := qd.parseResponse(context.Background(), &models.Query{}, res, false)
+		assert.Error(t, result.Error)
+		assert.Equal(t, result.Error.Error(), "unknown result type: ")
+	})
+
+	t.Run("resultType is set as empty string after result", func(t *testing.T) {
+		resBody := `{"data":{"result":[{"metric":{"__name__":"some_name","environment":"some_env","id":"some_id","instance":"some_instance:1234","job":"some_job","name":"another_name","region":"some_region"},"value":[1.1,"2"]}],"resultType":""},"status":"success"}`
+		res := &http.Response{Body: io.NopCloser(bytes.NewBufferString(resBody))}
+		result := qd.parseResponse(context.Background(), &models.Query{}, res, false)
+		assert.Error(t, result.Error)
+		assert.Equal(t, result.Error.Error(), "unknown result type: ")
+	})
+}