gurix
bb13527281
- TestAllClassesHaveConfig, TestFrequenciesInRange, TestFrequenciesUnique - TestHarmonicsNonEmpty, TestPanPositionsInRange - TestOscillatorAdvance, TestOscillatorPhaseWrap, TestOscillatorDistinctFreqs - TestEMAAmplitudeRise, TestEMAAmplitudeDecay, TestWhisperFloor, TestWhisperFloorNotSeenIsZero
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package synth_test
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import (
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"testing"
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"github.com/netsynth/netsynth/synth"
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)
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func TestOscillatorAdvance(t *testing.T) {
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harmonics := []synth.HarmonicDef{{Ratio: 1, Amplitude: 1.0}, {Ratio: 2, Amplitude: 0.5}}
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osc := synth.NewOscillator(440.0, synth.SampleRate)
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hasPos := false
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hasNeg := false
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for i := 0; i < 100; i++ {
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s := osc.Advance(harmonics)
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if s > 0 {
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hasPos = true
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}
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if s < 0 {
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hasNeg = true
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}
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}
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if !hasPos || !hasNeg {
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t.Errorf("expected both positive and negative samples; hasPos=%v hasNeg=%v", hasPos, hasNeg)
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}
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}
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func TestOscillatorPhaseWrap(t *testing.T) {
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harmonics := []synth.HarmonicDef{{Ratio: 1, Amplitude: 1.0}}
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osc := synth.NewOscillator(440.0, synth.SampleRate)
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for i := 0; i < synth.SampleRate; i++ {
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osc.Advance(harmonics)
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}
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p := osc.Phase()
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if p < 0 || p >= 1.0 {
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t.Errorf("expected phase in [0, 1), got %.6f", p)
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}
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}
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func TestOscillatorDistinctFreqs(t *testing.T) {
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harmonics := []synth.HarmonicDef{{Ratio: 1, Amplitude: 1.0}}
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osc65 := synth.NewOscillator(65.0, synth.SampleRate)
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osc440 := synth.NewOscillator(440.0, synth.SampleRate)
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same := true
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for i := 0; i < 100; i++ {
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s65 := osc65.Advance(harmonics)
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s440 := osc440.Advance(harmonics)
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if s65 != s440 {
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same = false
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break
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}
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}
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if same {
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t.Error("expected oscillators at 65 Hz and 440 Hz to produce different sample sequences")
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}
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}
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