ebpf_exporter

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package decoder
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import (
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	"bytes"
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	"testing"
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	"github.com/cloudflare/ebpf_exporter/v2/config"
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)
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func TestMajorMinorDecoder(t *testing.T) {
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	cases := []struct {
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		in    []byte
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		cache map[uint64][]byte
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		out   []byte
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	}{
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		{
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			in:    []byte{0x0, 0x8, 0x0, 0x0},
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			cache: map[uint64][]byte{uint64(2048): []byte("sda"), uint64(2064): []byte("sdb")},
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			out:   []byte("sda"),
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		},
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		{
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			in:    []byte{0x10, 0x8, 0x0, 0x0},
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			cache: map[uint64][]byte{uint64(2048): []byte("sda"), uint64(2064): []byte("sdb")},
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			out:   []byte("sdb"),
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		},
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		{
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			in:    []byte{0x10, 0x88, 0x0, 0x0},
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			cache: map[uint64][]byte{uint64(2048): []byte("sda")},
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			out:   []byte("unknown:136:16"),
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		},
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	}
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	for _, c := range cases {
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		d := &MajorMinor{cache: c.cache}
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		out, err := d.Decode(c.in, config.Decoder{})
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		if err != nil {
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			t.Errorf("Error decoding %#v with cache set to %#v: %s", c.in, c.cache, err)
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		}
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		if !bytes.Equal(out, c.out) {
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			t.Errorf("Expected %s, got %s", c.out, out)
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		}
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	}
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}
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