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package compressor_test
import (
"math"
"testing"
"github.com/ethereum-optimism/optimism/op-batcher/compressor"
"github.com/stretchr/testify/require"
)
// TestInputThreshold tests the [ChannelConfig.InputThreshold]
// function using a table-driven testing approach.
func TestInputThreshold(t *testing.T) {
type testInput struct {
TargetFrameSize uint64
TargetNumFrames int
ApproxComprRatio float64
}
type test struct {
input testInput
assertion func(uint64)
}
// Construct test cases that test the boundary conditions
tests := []test{
{
input: testInput{
TargetFrameSize: 1,
TargetNumFrames: 1,
ApproxComprRatio: 0.4,
},
assertion: func(output uint64) {
require.Equal(t, uint64(2), output)
},
},
{
input: testInput{
TargetFrameSize: 1,
TargetNumFrames: 100000,
ApproxComprRatio: 0.4,
},
assertion: func(output uint64) {
require.Equal(t, uint64(250_000), output)
},
},
{
input: testInput{
TargetFrameSize: 1,
TargetNumFrames: 1,
ApproxComprRatio: 1,
},
assertion: func(output uint64) {
require.Equal(t, uint64(1), output)
},
},
{
input: testInput{
TargetFrameSize: 1,
TargetNumFrames: 1,
ApproxComprRatio: 2,
},
assertion: func(output uint64) {
require.Equal(t, uint64(0), output)
},
},
{
input: testInput{
TargetFrameSize: 100000,
TargetNumFrames: 1,
ApproxComprRatio: 0.4,
},
assertion: func(output uint64) {
require.Equal(t, uint64(250_000), output)
},
},
{
input: testInput{
TargetFrameSize: 1,
TargetNumFrames: 100000,
ApproxComprRatio: 0.4,
},
assertion: func(output uint64) {
require.Equal(t, uint64(250_000), output)
},
},
{
input: testInput{
TargetFrameSize: 100000,
TargetNumFrames: 100000,
ApproxComprRatio: 0.4,
},
assertion: func(output uint64) {
require.Equal(t, uint64(25_000_000_000), output)
},
},
{
input: testInput{
TargetFrameSize: 1,
TargetNumFrames: 1,
ApproxComprRatio: 0.000001,
},
assertion: func(output uint64) {
require.Equal(t, uint64(1_000_000), output)
},
},
{
input: testInput{
TargetFrameSize: 0,
TargetNumFrames: 0,
ApproxComprRatio: 0,
},
assertion: func(output uint64) {
// Need to allow for NaN depending on the machine architecture
require.True(t, output == uint64(0) || output == uint64(math.NaN()))
},
},
}
// Validate each test case
for _, tt := range tests {
comp, err := compressor.NewRatioCompressor(compressor.Config{
TargetFrameSize: tt.input.TargetFrameSize,
TargetNumFrames: tt.input.TargetNumFrames,
ApproxComprRatio: tt.input.ApproxComprRatio,
})
require.NoError(t, err)
got := comp.(*compressor.RatioCompressor).InputThreshold()
tt.assertion(got)
}
}