111 lines
2.2 KiB
Go
111 lines
2.2 KiB
Go
package chart
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import (
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"testing"
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"github.com/blendlabs/go-assert"
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)
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type mockValueProvider struct {
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X []float64
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Y []float64
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}
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func (m mockValueProvider) Len() int {
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return Math.MinInt(len(m.X), len(m.Y))
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}
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func (m mockValueProvider) GetValue(index int) (x, y float64) {
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if index < 0 {
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panic("negative index at GetValue()")
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}
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if index > Math.MinInt(len(m.X), len(m.Y)) {
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panic("index is outside the length of m.X or m.Y")
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}
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x = m.X[index]
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y = m.Y[index]
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return
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}
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func TestSMASeriesGetValue(t *testing.T) {
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assert := assert.New(t)
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mockSeries := mockValueProvider{
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Sequence.Float64(1.0, 10.0),
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Sequence.Float64(10, 1.0),
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}
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assert.Equal(10, mockSeries.Len())
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mas := &SMASeries{
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InnerSeries: mockSeries,
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Period: 10,
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}
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var yvalues []float64
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for x := 0; x < mas.Len(); x++ {
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_, y := mas.GetValue(x)
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yvalues = append(yvalues, y)
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}
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assert.Equal(10.0, yvalues[0])
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assert.Equal(9.5, yvalues[1])
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assert.Equal(9.0, yvalues[2])
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assert.Equal(8.5, yvalues[3])
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assert.Equal(8.0, yvalues[4])
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assert.Equal(7.5, yvalues[5])
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assert.Equal(7.0, yvalues[6])
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assert.Equal(6.5, yvalues[7])
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assert.Equal(6.0, yvalues[8])
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}
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func TestSMASeriesGetLastValueWindowOverlap(t *testing.T) {
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assert := assert.New(t)
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mockSeries := mockValueProvider{
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Sequence.Float64(1.0, 10.0),
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Sequence.Float64(10, 1.0),
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}
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assert.Equal(10, mockSeries.Len())
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mas := &SMASeries{
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InnerSeries: mockSeries,
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Period: 15,
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}
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var yvalues []float64
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for x := 0; x < mas.Len(); x++ {
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_, y := mas.GetValue(x)
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yvalues = append(yvalues, y)
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}
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lx, ly := mas.GetLastValue()
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assert.Equal(10.0, lx)
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assert.Equal(5.5, ly)
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assert.Equal(yvalues[len(yvalues)-1], ly)
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}
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func TestSMASeriesGetLastValue(t *testing.T) {
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assert := assert.New(t)
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mockSeries := mockValueProvider{
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Sequence.Float64(1.0, 100.0),
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Sequence.Float64(100, 1.0),
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}
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assert.Equal(100, mockSeries.Len())
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mas := &SMASeries{
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InnerSeries: mockSeries,
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Period: 10,
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}
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var yvalues []float64
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for x := 0; x < mas.Len(); x++ {
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_, y := mas.GetValue(x)
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yvalues = append(yvalues, y)
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}
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lx, ly := mas.GetLastValue()
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assert.Equal(100.0, lx)
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assert.Equal(6, ly)
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assert.Equal(yvalues[len(yvalues)-1], ly)
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}
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