go-chart/seq/seq_test.go

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package seq
import (
"testing"
2018-04-05 09:42:38 +02:00
assert "github.com/blend/go-sdk/assert"
)
func TestSequenceEach(t *testing.T) {
assert := assert.New(t)
values := Seq{NewArray(1, 2, 3, 4)}
values.Each(func(i int, v float64) {
assert.Equal(i, v-1)
})
}
func TestSequenceMap(t *testing.T) {
assert := assert.New(t)
values := Seq{NewArray(1, 2, 3, 4)}
mapped := values.Map(func(i int, v float64) float64 {
assert.Equal(i, v-1)
return v * 2
})
assert.Equal(4, mapped.Len())
}
func TestSequenceFoldLeft(t *testing.T) {
assert := assert.New(t)
values := Seq{NewArray(1, 2, 3, 4)}
ten := values.FoldLeft(func(_ int, vp, v float64) float64 {
return vp + v
})
assert.Equal(10, ten)
orderTest := Seq{NewArray(10, 3, 2, 1)}
four := orderTest.FoldLeft(func(_ int, vp, v float64) float64 {
return vp - v
})
assert.Equal(4, four)
}
func TestSequenceFoldRight(t *testing.T) {
assert := assert.New(t)
values := Seq{NewArray(1, 2, 3, 4)}
ten := values.FoldRight(func(_ int, vp, v float64) float64 {
return vp + v
})
assert.Equal(10, ten)
orderTest := Seq{NewArray(10, 3, 2, 1)}
notFour := orderTest.FoldRight(func(_ int, vp, v float64) float64 {
return vp - v
})
assert.Equal(-14, notFour)
}
func TestSequenceSum(t *testing.T) {
assert := assert.New(t)
values := Seq{NewArray(1, 2, 3, 4)}
assert.Equal(10, values.Sum())
}
func TestSequenceAverage(t *testing.T) {
assert := assert.New(t)
values := Seq{NewArray(1, 2, 3, 4)}
assert.Equal(2.5, values.Average())
valuesOdd := Seq{NewArray(1, 2, 3, 4, 5)}
assert.Equal(3, valuesOdd.Average())
}
func TestSequenceVariance(t *testing.T) {
assert := assert.New(t)
values := Seq{NewArray(1, 2, 3, 4, 5)}
assert.Equal(2, values.Variance())
}
func TestSequenceNormalize(t *testing.T) {
assert := assert.New(t)
normalized := Values(1, 2, 3, 4, 5).Normalize().Array()
assert.NotEmpty(normalized)
assert.Len(normalized, 5)
assert.Equal(0, normalized[0])
assert.Equal(0.25, normalized[1])
assert.Equal(1, normalized[4])
}