163 lines
3.3 KiB
Go
163 lines
3.3 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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func TestRingBuffer(t *testing.T) {
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assert := assert.New(t)
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buffer := NewRingBuffer()
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buffer.Enqueue(1)
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assert.Equal(1, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(1, buffer.PeekBack())
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buffer.Enqueue(2)
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assert.Equal(2, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(2, buffer.PeekBack())
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buffer.Enqueue(3)
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assert.Equal(3, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(3, buffer.PeekBack())
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buffer.Enqueue(4)
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assert.Equal(4, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(4, buffer.PeekBack())
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buffer.Enqueue(5)
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assert.Equal(5, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(5, buffer.PeekBack())
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buffer.Enqueue(6)
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assert.Equal(6, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(6, buffer.PeekBack())
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buffer.Enqueue(7)
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assert.Equal(7, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(7, buffer.PeekBack())
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buffer.Enqueue(8)
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assert.Equal(8, buffer.Len())
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assert.Equal(1, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value := buffer.Dequeue()
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assert.Equal(1, value)
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assert.Equal(7, buffer.Len())
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assert.Equal(2, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value = buffer.Dequeue()
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assert.Equal(2, value)
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assert.Equal(6, buffer.Len())
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assert.Equal(3, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value = buffer.Dequeue()
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assert.Equal(3, value)
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assert.Equal(5, buffer.Len())
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assert.Equal(4, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value = buffer.Dequeue()
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assert.Equal(4, value)
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assert.Equal(4, buffer.Len())
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assert.Equal(5, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value = buffer.Dequeue()
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assert.Equal(5, value)
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assert.Equal(3, buffer.Len())
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assert.Equal(6, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value = buffer.Dequeue()
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assert.Equal(6, value)
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assert.Equal(2, buffer.Len())
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assert.Equal(7, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value = buffer.Dequeue()
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assert.Equal(7, value)
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assert.Equal(1, buffer.Len())
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assert.Equal(8, buffer.Peek())
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assert.Equal(8, buffer.PeekBack())
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value = buffer.Dequeue()
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assert.Equal(8, value)
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assert.Equal(0, buffer.Len())
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assert.Nil(buffer.Peek())
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assert.Nil(buffer.PeekBack())
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}
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func TestRingBufferClear(t *testing.T) {
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assert := assert.New(t)
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buffer := NewRingBuffer()
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buffer.Enqueue(1)
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buffer.Enqueue(1)
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buffer.Enqueue(1)
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buffer.Enqueue(1)
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buffer.Enqueue(1)
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buffer.Enqueue(1)
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buffer.Enqueue(1)
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buffer.Enqueue(1)
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assert.Equal(8, buffer.Len())
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buffer.Clear()
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assert.Equal(0, buffer.Len())
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assert.Nil(buffer.Peek())
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assert.Nil(buffer.PeekBack())
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}
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func TestRingBufferAsSlice(t *testing.T) {
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assert := assert.New(t)
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buffer := NewRingBuffer()
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buffer.Enqueue(1)
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buffer.Enqueue(2)
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buffer.Enqueue(3)
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buffer.Enqueue(4)
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buffer.Enqueue(5)
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contents := buffer.AsSlice()
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assert.Len(contents, 5)
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assert.Equal(1, contents[0])
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assert.Equal(2, contents[1])
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assert.Equal(3, contents[2])
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assert.Equal(4, contents[3])
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assert.Equal(5, contents[4])
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}
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func TestRingBufferEach(t *testing.T) {
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assert := assert.New(t)
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buffer := NewRingBuffer()
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for x := 1; x < 17; x++ {
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buffer.Enqueue(x)
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}
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called := 0
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buffer.Each(func(v interface{}) {
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if typed, isTyped := v.(int); isTyped {
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if typed == (called + 1) {
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called++
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}
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}
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})
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assert.Equal(16, called)
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}
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