func (serv MetricsService) Query(Expr string, Json string) (result string) {
exprNode, err := rules.LoadExprFromString(Expr)
if err != nil {
return ast.ErrorToJSON(err)
}
timestamp := time.Now()
rb := serv.ResponseBuilder()
var format ast.OutputFormat
if Json != "" {
format = ast.JSON
rb.SetContentType(gorest.Application_Json)
} else {
format = ast.TEXT
rb.SetContentType(gorest.Text_Plain)
}
return ast.EvalToString(exprNode, ×tamp, format)
}
func TestExpressions(t *testing.T) {
temporaryDirectory, err := ioutil.TempDir("", "leveldb_metric_persistence_test")
if err != nil {
t.Errorf("Could not create temporary directory: %q\n", err)
return
}
defer func() {
if err = os.RemoveAll(temporaryDirectory); err != nil {
t.Errorf("Could not remove temporary directory: %q\n", err)
}
}()
persistence, err := leveldb.NewLevelDBMetricPersistence(temporaryDirectory)
if err != nil {
t.Errorf("Could not create LevelDB Metric Persistence: %q\n", err)
return
}
if persistence == nil {
t.Errorf("Received nil LevelDB Metric Persistence.\n")
return
}
defer func() {
persistence.Close()
}()
storeMatrix(persistence, testMatrix)
ast.SetPersistence(persistence)
for _, exprTest := range expressionTests {
expectedLines := annotateWithTime(exprTest.output)
testExpr, err := LoadExprFromString(exprTest.expr)
if err != nil {
if exprTest.shouldFail {
continue
}
t.Errorf("Error during parsing: %v", err)
t.Errorf("Expression: %v", exprTest.expr)
} else {
failed := false
resultStr := ast.EvalToString(testExpr, &testEvalTime, ast.TEXT)
resultLines := strings.Split(resultStr, "\n")
if len(exprTest.output) != len(resultLines) {
t.Errorf("Number of samples in expected and actual output don't match")
failed = true
}
for _, expectedSample := range expectedLines {
found := false
for _, actualSample := range resultLines {
if actualSample == expectedSample {
found = true
}
}
if !found {
t.Errorf("Couldn't find expected sample in output: '%v'",
expectedSample)
failed = true
}
}
if failed {
t.Errorf("Expression: %v\n%v", exprTest.expr, vectorComparisonString(expectedLines, resultLines))
}
}
}
}