43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
package chart
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import (
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"testing"
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"github.com/wcharczuk/go-chart/v2/testutil"
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)
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func TestLogRangeTranslate(t *testing.T) {
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values := []float64{1, 10, 100, 1000, 10000, 100000, 1000000}
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r := LogarithmicRange{Domain: 1000}
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r.Min, r.Max = MinMax(values...)
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testutil.AssertEqual(t, 0, r.Translate(0)) // goes to bottom
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testutil.AssertEqual(t, 0, r.Translate(1)) // goes to bottom
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testutil.AssertEqual(t, 160, r.Translate(10)) // roughly 1/6th of max
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testutil.AssertEqual(t, 500, r.Translate(1000)) // roughly 1/2 of max (1.0e6 / 1.0e3)
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testutil.AssertEqual(t, 1000, r.Translate(1000000)) // max value
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}
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func TestGetTicks(t *testing.T) {
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values := []float64{35, 512, 1525122}
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r := LogarithmicRange{Domain: 1000}
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r.Min, r.Max = MinMax(values...)
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ticks := r.GetTicks(nil, Style{}, FloatValueFormatter)
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testutil.AssertEqual(t, 7, len(ticks))
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testutil.AssertEqual(t, 10, ticks[0].Value)
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testutil.AssertEqual(t, 100, ticks[1].Value)
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testutil.AssertEqual(t, 10000000, ticks[6].Value)
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}
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func TestGetTicksFromHigh(t *testing.T) {
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values := []float64{1412, 352144, 1525122} // min tick should be 1000
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r := LogarithmicRange{}
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r.Min, r.Max = MinMax(values...)
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ticks := r.GetTicks(nil, Style{}, FloatValueFormatter)
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testutil.AssertEqual(t, 5, len(ticks))
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testutil.AssertEqual(t, float64(1000), ticks[0].Value)
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testutil.AssertEqual(t, float64(10000), ticks[1].Value)
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testutil.AssertEqual(t, float64(10000000), ticks[4].Value)
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}
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