sampler-fork/component/sparkline/sparkline_test.go

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package sparkline
import (
"testing"
)
func TestSparkLine_trimOutOfRangeValues(t *testing.T) {
type Sparkline struct {
maxSize int
expectedSize int
values []float64
}
tests := []struct {
name string
sparkline Sparkline
}{
{"should trimOutOfRangeValues values to the max size", Sparkline{maxSize: 5, expectedSize: 5, values: []float64{1, 2, 3, 4, 5, 6, 7, 8}}},
{"should not trimOutOfRangeValues values if max size is bigger than values len", Sparkline{maxSize: 5, expectedSize: 3, values: []float64{1, 2, 3}}},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &SparkLine{
values: tt.sparkline.values,
}
s.trimOutOfRangeValues(tt.sparkline.maxSize)
if len(s.values) != tt.sparkline.expectedSize {
t.Errorf("Values size after trimOutOfRangeValues is %v, but needed to be %v", len(s.values), tt.sparkline.expectedSize)
}
})
}
}