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Add additional test cases to verify different base domains produce different shuffle orders

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Added two more test cases with the same dataset (region 4) but different base domains to ensure the shuffle is truly deterministic and that different seeds produce different results.

Co-authored-by: kradalby <98431+kradalby@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
2025-11-01 07:39:15 +00:00
parent 1980ee6ca4
commit 18fb3f00a8
1 changed files with 68 additions and 0 deletions
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68
hscontrol/derp/derp_test.go
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@@ -169,6 +169,74 @@ func TestShuffleDERPMapDeterministic(t *testing.T) {
},
},
},
{
name: "same dataset with another base domain",
baseDomain: "another.example.com",
derpMap: &tailcfg.DERPMap{
Regions: map[int]*tailcfg.DERPRegion{
4: {
RegionID: 4,
RegionCode: "fra",
RegionName: "Frankfurt",
Nodes: []*tailcfg.DERPNode{
{Name: "4f", RegionID: 4, HostName: "derp4f.tailscale.com"},
{Name: "4g", RegionID: 4, HostName: "derp4g.tailscale.com"},
{Name: "4h", RegionID: 4, HostName: "derp4h.tailscale.com"},
{Name: "4i", RegionID: 4, HostName: "derp4i.tailscale.com"},
},
},
},
},
expected: &tailcfg.DERPMap{
Regions: map[int]*tailcfg.DERPRegion{
4: {
RegionID: 4,
RegionCode: "fra",
RegionName: "Frankfurt",
Nodes: []*tailcfg.DERPNode{
{Name: "4h", RegionID: 4, HostName: "derp4h.tailscale.com"},
{Name: "4f", RegionID: 4, HostName: "derp4f.tailscale.com"},
{Name: "4g", RegionID: 4, HostName: "derp4g.tailscale.com"},
{Name: "4i", RegionID: 4, HostName: "derp4i.tailscale.com"},
},
},
},
},
},
{
name: "same dataset with yet another base domain",
baseDomain: "yetanother.example.com",
derpMap: &tailcfg.DERPMap{
Regions: map[int]*tailcfg.DERPRegion{
4: {
RegionID: 4,
RegionCode: "fra",
RegionName: "Frankfurt",
Nodes: []*tailcfg.DERPNode{
{Name: "4f", RegionID: 4, HostName: "derp4f.tailscale.com"},
{Name: "4g", RegionID: 4, HostName: "derp4g.tailscale.com"},
{Name: "4h", RegionID: 4, HostName: "derp4h.tailscale.com"},
{Name: "4i", RegionID: 4, HostName: "derp4i.tailscale.com"},
},
},
},
},
expected: &tailcfg.DERPMap{
Regions: map[int]*tailcfg.DERPRegion{
4: {
RegionID: 4,
RegionCode: "fra",
RegionName: "Frankfurt",
Nodes: []*tailcfg.DERPNode{
{Name: "4i", RegionID: 4, HostName: "derp4i.tailscale.com"},
{Name: "4h", RegionID: 4, HostName: "derp4h.tailscale.com"},
{Name: "4f", RegionID: 4, HostName: "derp4f.tailscale.com"},
{Name: "4g", RegionID: 4, HostName: "derp4g.tailscale.com"},
},
},
},
},
},
}
for _, tt := range tests {