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38 lines
1.6 KiB
Go
38 lines
1.6 KiB
Go
package overlay
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import (
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"bytes"
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"net/netip"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestLinkLocal(t *testing.T) {
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r := bytes.NewReader([]byte{42, 99})
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result := genLinkLocal(r)
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assert.Equal(t, netip.MustParsePrefix("169.254.42.99/32"), result, "genLinkLocal with a deterministic randomizer")
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result = genLinkLocal(nil)
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assert.True(t, result.IsValid(), "genLinkLocal with nil randomizer should be valid")
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assert.True(t, result.Addr().IsLinkLocalUnicast(), "genLinkLocal with nil randomizer should be link-local")
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result = coerceLinkLocal([]byte{169, 254, 100, 50})
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assert.Equal(t, netip.MustParsePrefix("169.254.100.50/32"), result, "coerceLinkLocal should pass through normal values")
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result = coerceLinkLocal([]byte{169, 254, 0, 0})
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assert.Equal(t, netip.MustParsePrefix("169.254.0.1/32"), result, "coerceLinkLocal should bump .0 last octet to .1")
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result = coerceLinkLocal([]byte{169, 254, 255, 255})
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assert.Equal(t, netip.MustParsePrefix("169.254.255.254/32"), result, "coerceLinkLocal should bump broadcast 255.255 to 255.254")
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result = coerceLinkLocal([]byte{169, 254, 0, 1})
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assert.Equal(t, netip.MustParsePrefix("169.254.0.1/32"), result, "coerceLinkLocal should leave .1 last octet unchanged")
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result = coerceLinkLocal([]byte{169, 254, 255, 254})
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assert.Equal(t, netip.MustParsePrefix("169.254.255.254/32"), result, "coerceLinkLocal should leave 255.254 unchanged")
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result = coerceLinkLocal([]byte{169, 254, 255, 100})
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assert.Equal(t, netip.MustParsePrefix("169.254.255.100/32"), result, "coerceLinkLocal should leave 255.100 unchanged")
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}
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