58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
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package graph
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import (
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"sync/atomic"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestDebouncer_Coalesces(t *testing.T) {
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d := NewDebouncer(50 * time.Millisecond)
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var calls atomic.Int32
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// Fire 10 rapid calls for the same key — only the last should execute.
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for range 10 {
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d.Debounce("key1", func() {
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calls.Add(1)
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})
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}
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// Wait for the debounce delay plus some margin.
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time.Sleep(150 * time.Millisecond)
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assert.Equal(t, int32(1), calls.Load(), "rapid calls should coalesce into a single execution")
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}
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func TestDebouncer_DifferentKeys(t *testing.T) {
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d := NewDebouncer(50 * time.Millisecond)
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var calls atomic.Int32
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d.Debounce("key-a", func() { calls.Add(1) })
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d.Debounce("key-b", func() { calls.Add(1) })
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d.Debounce("key-c", func() { calls.Add(1) })
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time.Sleep(150 * time.Millisecond)
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assert.Equal(t, int32(3), calls.Load(), "different keys should fire independently")
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}
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func TestDebouncer_TimerReset(t *testing.T) {
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d := NewDebouncer(100 * time.Millisecond)
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var value atomic.Int32
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// First call sets value to 1.
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d.Debounce("key", func() { value.Store(1) })
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// Wait 60ms (less than the 100ms delay), then replace with value 2.
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time.Sleep(60 * time.Millisecond)
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d.Debounce("key", func() { value.Store(2) })
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// At 60ms the first timer hasn't fired yet. Wait for the second timer.
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time.Sleep(150 * time.Millisecond)
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require.Equal(t, int32(2), value.Load(), "later call should replace the earlier one")
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}
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