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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cmpver
import "testing"
func TestCompare(t *testing.T) {
tests := []struct {
name string
v1, v2 string
want int
}{
{
name: "both empty",
want: 0,
},
{
name: "v1 empty",
v2: "1.2.3",
want: -1,
},
{
name: "v2 empty",
v1: "1.2.3",
want: 1,
},
{
name: "semver major",
v1: "2.0.0",
v2: "1.9.9",
want: 1,
},
{
name: "semver major",
v1: "2.0.0",
v2: "1.9.9",
want: 1,
},
{
name: "semver minor",
v1: "1.9.0",
v2: "1.8.9",
want: 1,
},
{
name: "semver patch",
v1: "1.9.9",
v2: "1.9.8",
want: 1,
},
{
name: "semver equal",
v1: "1.9.8",
v2: "1.9.8",
want: 0,
},
{
name: "tailscale major",
v1: "1.0-0",
v2: "0.97-105",
want: 1,
},
{
name: "tailscale minor",
v1: "0.98-0",
v2: "0.97-105",
want: 1,
},
{
name: "tailscale patch",
v1: "0.97-120",
v2: "0.97-105",
want: 1,
},
{
name: "tailscale equal",
v1: "0.97-105",
v2: "0.97-105",
want: 0,
},
{
name: "tailscale weird extra field",
v1: "0.96.1-0", // more fields == larger
v2: "0.96-105",
want: 1,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
got := Compare(test.v1, test.v2)
if got != test.want {
t.Errorf("Compare(%v, %v) = %v, want %v", test.v1, test.v2, got, test.want)
}
// Reversing the comparison should reverse the outcome.
got2 := Compare(test.v2, test.v1)
if got2 != -test.want {
t.Errorf("Compare(%v, %v) = %v, want %v", test.v2, test.v1, got2, -test.want)
}
})
}
}
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