~rbn/fit

ref: d4e952d1ef97f706723c91cd9a76734bafb01662 fit/strategy_test.go -rw-r--r-- 2.0 KiB View raw
d4e952d1Ruben Schuller return errors for bin methods 1 year, 5 months ago
                                                                                
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package fit

import (
	"bytes"
	"testing"
)

type strategyTest struct {
	item Item
	bin  int
	pos  int
}

var firstTests = []strategyTest{
	{
		item: Item{Data: []byte("a"), Size: 8},
		bin:  0,
		pos:  0,
	},
	{
		item: Item{Data: []byte("b"), Size: 1},
		bin:  0,
		pos:  1,
	},
	{
		item: Item{Data: []byte("c"), Size: 3},
		bin:  1,
		pos:  0,
	},
	{
		item: Item{Data: []byte("d"), Size: 1},
		bin:  0,
		pos:  2,
	},
	{
		item: Item{Data: []byte("e"), Size: 4},
		bin:  1,
		pos:  1,
	},
}

// one must swap the bins in head, as they are sorted in place. this isn't nice.
var bestTests = []strategyTest{
	{
		item: Item{Data: []byte("a"), Size: 6},
		bin:  0,
		pos:  0,
	},
	{
		item: Item{Data: []byte("b"), Size: 8},
		bin:  1,
		pos:  0,
	},
	{
		item: Item{Data: []byte("c"), Size: 1},
		bin:  0,
		pos:  1,
	},
	{
		item: Item{Data: []byte("d"), Size: 2},
		bin:  1,
		pos:  1,
	},
	{
		item: Item{Data: []byte("e"), Size: 1},
		bin:  0,
		pos:  2,
	},
}

var worstTests = []strategyTest{
	{
		item: Item{Data: []byte("a"), Size: 6},
		bin:  0,
		pos:  0,
	},
	{
		item: Item{Data: []byte("b"), Size: 8},
		bin:  1,
		pos:  0,
	},
	{
		item: Item{Data: []byte("c"), Size: 1},
		bin:  0,
		pos:  1,
	},
	{
		item: Item{Data: []byte("d"), Size: 2},
		bin:  0,
		pos:  2,
	},
	{
		item: Item{Data: []byte("e"), Size: 1},
		bin:  0,
		pos:  1,
	},
}

func testStrategy(t *testing.T, strategy StrategyFunc, tests []strategyTest) {
	bins := []Bin{}

	for _, test := range tests {
		var err error
		bins, err = strategy(bins, 10, test.item)
		if err != nil {
			t.FailNow()
		}
		t.Logf("%#v",bins)

		binItem := bins[test.bin].Items()[test.pos]
		if !bytes.Equal(binItem.Data, test.item.Data) || binItem.Size != test.item.Size {
			t.Logf("items differ: %+v %+v", binItem, test.item)
			t.Fail()
		}
	}
}

func TestFirst(t *testing.T) {
	testStrategy(t, First, firstTests)
}

func TestBest(t *testing.T) {
	testStrategy(t, Best, bestTests)
}

func TestWorst(t *testing.T) {
	testStrategy(t, Worst, worstTests)
}