95 lines
2 KiB
Go
95 lines
2 KiB
Go
/*
|
|
* Copyright 2014 Google Inc. All rights reserved.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package natsort
|
|
|
|
import "testing"
|
|
|
|
func TestLess(t *testing.T) {
|
|
tests := []struct {
|
|
s, t string
|
|
want cmp
|
|
}{
|
|
{"", "", eq},
|
|
{"a", "", gt},
|
|
{"a", "a", eq},
|
|
{"1", "10", lt},
|
|
{"20", "3", gt},
|
|
{"a1", "a10", lt},
|
|
{"a2", "a10", lt},
|
|
{"a5b2", "a5b7", lt},
|
|
{"a50b2", "a6b7", gt},
|
|
{"世20", "世界3", lt},
|
|
{"50a", "50b", lt},
|
|
{"a50", "a050", gt},
|
|
{"a01b3", "a1b2", lt},
|
|
{"thx1138", "thx1138", eq},
|
|
{"thx1138a", "thx1138b", lt},
|
|
{"thx1138a", "thx1138", gt},
|
|
|
|
// a < a0 < a1 < a1a < a1b < a2 < a10 < a20
|
|
{"a", "a0", lt},
|
|
{"a0", "a1", lt},
|
|
{"a1", "a1a", lt},
|
|
{"a1a", "a1b", lt},
|
|
{"a2", "a10", lt},
|
|
{"a10", "a20", lt},
|
|
|
|
// 1.001 < 1.002 < 1.010 < 1.02 < 1.1 < 1.3
|
|
{"1.001", "1.002", lt},
|
|
{"1.002", "1.010", lt},
|
|
{"1.010", "1.02", gt}, // TODO(light): should this be lt?
|
|
{"1.02", "1.1", gt}, // TODO(light): should this be lt?
|
|
{"1.1", "1.3", lt},
|
|
}
|
|
for _, test := range tests {
|
|
v := bit(Less(test.s, test.t))
|
|
v |= bit(Less(test.t, test.s)) << 1
|
|
if cmp(v) != test.want {
|
|
t.Errorf("%[1]q %[3]v %[2]q, want %[1]q %[4]v %[2]q", test.s, test.t, cmp(v), test.want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func bit(b bool) int {
|
|
if b {
|
|
return 1
|
|
} else {
|
|
return 0
|
|
}
|
|
}
|
|
|
|
type cmp int
|
|
|
|
const (
|
|
eq cmp = iota
|
|
lt
|
|
gt
|
|
)
|
|
|
|
func (c cmp) String() string {
|
|
switch c {
|
|
case lt:
|
|
return "<"
|
|
case gt:
|
|
return ">"
|
|
case eq:
|
|
return "=="
|
|
default:
|
|
return "<>"
|
|
}
|
|
}
|