github.com/MontFerret/ferret@v0.18.0/pkg/stdlib/arrays/first_test.go (about)

     1  package arrays_test
     2  
     3  import (
     4  	"context"
     5  	"testing"
     6  
     7  	. "github.com/smartystreets/goconvey/convey"
     8  
     9  	"github.com/MontFerret/ferret/pkg/runtime/values"
    10  	"github.com/MontFerret/ferret/pkg/stdlib/arrays"
    11  )
    12  
    13  func TestFirst(t *testing.T) {
    14  	Convey("Should return a first element form a given array", t, func() {
    15  		arr := values.NewArrayWith(
    16  			values.NewInt(1),
    17  			values.NewInt(2),
    18  			values.NewInt(3),
    19  			values.NewInt(4),
    20  			values.NewInt(5),
    21  		)
    22  
    23  		out, err := arrays.First(context.Background(), arr)
    24  
    25  		So(err, ShouldBeNil)
    26  		So(out, ShouldEqual, 1)
    27  	})
    28  
    29  	Convey("Should return NONE if a given array is empty", t, func() {
    30  		arr := values.NewArray(0)
    31  
    32  		out, err := arrays.First(context.Background(), arr)
    33  
    34  		So(err, ShouldBeNil)
    35  		So(out, ShouldEqual, values.None)
    36  	})
    37  }