go-chart/seq/buffer_test.go

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package seq
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import (
"testing"
"github.com/blendlabs/go-assert"
)
func TestBuffer(t *testing.T) {
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assert := assert.New(t)
buffer := NewBuffer()
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buffer.Enqueue(1)
assert.Equal(1, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(1, buffer.PeekBack())
buffer.Enqueue(2)
assert.Equal(2, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(2, buffer.PeekBack())
buffer.Enqueue(3)
assert.Equal(3, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(3, buffer.PeekBack())
buffer.Enqueue(4)
assert.Equal(4, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(4, buffer.PeekBack())
buffer.Enqueue(5)
assert.Equal(5, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(5, buffer.PeekBack())
buffer.Enqueue(6)
assert.Equal(6, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(6, buffer.PeekBack())
buffer.Enqueue(7)
assert.Equal(7, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(7, buffer.PeekBack())
buffer.Enqueue(8)
assert.Equal(8, buffer.Len())
assert.Equal(1, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value := buffer.Dequeue()
assert.Equal(1, value)
assert.Equal(7, buffer.Len())
assert.Equal(2, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value = buffer.Dequeue()
assert.Equal(2, value)
assert.Equal(6, buffer.Len())
assert.Equal(3, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value = buffer.Dequeue()
assert.Equal(3, value)
assert.Equal(5, buffer.Len())
assert.Equal(4, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value = buffer.Dequeue()
assert.Equal(4, value)
assert.Equal(4, buffer.Len())
assert.Equal(5, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value = buffer.Dequeue()
assert.Equal(5, value)
assert.Equal(3, buffer.Len())
assert.Equal(6, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value = buffer.Dequeue()
assert.Equal(6, value)
assert.Equal(2, buffer.Len())
assert.Equal(7, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value = buffer.Dequeue()
assert.Equal(7, value)
assert.Equal(1, buffer.Len())
assert.Equal(8, buffer.Peek())
assert.Equal(8, buffer.PeekBack())
value = buffer.Dequeue()
assert.Equal(8, value)
assert.Equal(0, buffer.Len())
assert.Zero(buffer.Peek())
assert.Zero(buffer.PeekBack())
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}
func TestBufferClear(t *testing.T) {
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assert := assert.New(t)
buffer := NewBuffer()
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buffer.Enqueue(1)
buffer.Enqueue(1)
buffer.Enqueue(1)
buffer.Enqueue(1)
buffer.Enqueue(1)
buffer.Enqueue(1)
buffer.Enqueue(1)
buffer.Enqueue(1)
assert.Equal(8, buffer.Len())
buffer.Clear()
assert.Equal(0, buffer.Len())
assert.Zero(buffer.Peek())
assert.Zero(buffer.PeekBack())
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}
func TestBufferArray(t *testing.T) {
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assert := assert.New(t)
buffer := NewBuffer()
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buffer.Enqueue(1)
buffer.Enqueue(2)
buffer.Enqueue(3)
buffer.Enqueue(4)
buffer.Enqueue(5)
contents := buffer.Array()
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assert.Len(contents, 5)
assert.Equal(1, contents[0])
assert.Equal(2, contents[1])
assert.Equal(3, contents[2])
assert.Equal(4, contents[3])
assert.Equal(5, contents[4])
}
func TestBufferEach(t *testing.T) {
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assert := assert.New(t)
buffer := NewBuffer()
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for x := 1; x < 17; x++ {
buffer.Enqueue(float64(x))
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}
called := 0
buffer.Each(func(_ int, v float64) {
if v == float64(called+1) {
called++
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}
})
assert.Equal(16, called)
}
func TestNewBuffer(t *testing.T) {
assert := assert.New(t)
empty := NewBuffer()
assert.NotNil(empty)
assert.Zero(empty.Len())
assert.Equal(bufferDefaultCapacity, empty.Capacity())
assert.Zero(empty.Peek())
assert.Zero(empty.PeekBack())
}
func TestNewBufferWithValues(t *testing.T) {
assert := assert.New(t)
values := NewBuffer(1, 2, 3, 4, 5)
assert.NotNil(values)
assert.Equal(5, values.Len())
assert.Equal(1, values.Peek())
assert.Equal(5, values.PeekBack())
}
func TestBufferGrowth(t *testing.T) {
assert := assert.New(t)
values := NewBuffer(1, 2, 3, 4, 5)
for i := 0; i < 1<<10; i++ {
values.Enqueue(float64(i))
}
assert.Equal(1<<10-1, values.PeekBack())
}