github.com/go-graphite/carbonapi@v0.17.0/expr/functions/exp/function_test.go (about)

     1  package exp
     2  
     3  import (
     4  	"math"
     5  	"testing"
     6  	"time"
     7  
     8  	"github.com/go-graphite/carbonapi/expr/interfaces"
     9  	"github.com/go-graphite/carbonapi/expr/metadata"
    10  	"github.com/go-graphite/carbonapi/expr/types"
    11  	"github.com/go-graphite/carbonapi/pkg/parser"
    12  	th "github.com/go-graphite/carbonapi/tests"
    13  )
    14  
    15  var (
    16  	md []interfaces.FunctionMetadata = New("")
    17  )
    18  
    19  func init() {
    20  	for _, m := range md {
    21  		metadata.RegisterFunction(m.Name, m.F)
    22  	}
    23  }
    24  
    25  func TestExp(t *testing.T) {
    26  	now32 := int64(time.Now().Unix())
    27  
    28  	tests := []th.EvalTestItem{
    29  		{
    30  			"exp(metric1)",
    31  			map[parser.MetricRequest][]*types.MetricData{
    32  				{Metric: "metric1", From: 0, Until: 1}: {types.MakeMetricData("metric1", []float64{1, 1, 2, math.NaN(), 3, 4, 5, 6, math.NaN()}, 1, now32)},
    33  			},
    34  			[]*types.MetricData{types.MakeMetricData("exp(metric1)",
    35  				[]float64{2.718281828459, 2.718281828459, 7.3890560989307, math.NaN(), 20.085536923188, 54.598150033144, 148.41315910258, 403.42879349274, math.NaN()}, 1, now32).SetTag("exp", "e")},
    36  		},
    37  	}
    38  
    39  	for _, tt := range tests {
    40  		testName := tt.Target
    41  		t.Run(testName, func(t *testing.T) {
    42  			eval := th.EvaluatorFromFunc(md[0].F)
    43  			th.TestEvalExpr(t, eval, &tt)
    44  		})
    45  	}
    46  
    47  }