forgejo/modules/base/tool_test.go
wxiaoguang 5b89670a31
Use a general Eval function for expressions in templates. (#23927)
One of the proposals in #23328

This PR introduces a simple expression calculator
(templates/eval/eval.go), it can do basic expression calculations.

Many untested template helper functions like `Mul` `Add` can be replaced
by this new approach.

Then these `Add` / `Mul` / `percentage` / `Subtract` / `DiffStatsWidth`
could all use this `Eval`.

And it provides enhancements for Golang templates, and improves
readability.

Some examples:

----

* Before: `{{Add (Mul $glyph.Row 12) 12}}`
* After: `{{Eval $glyph.Row "*" 12 "+" 12}}`

----

* Before: `{{if lt (Add $i 1) (len $.Topics)}}`
* After: `{{if Eval $i "+" 1 "<" (len $.Topics)}}`

## FAQ

### Why not use an existing expression package?

We need a highly customized expression engine:

* do the calculation on the fly, without pre-compiling
* deal with int/int64/float64 types, to make the result could be used in
Golang template.
* make the syntax could be used in the Golang template directly
* do not introduce too much complex or strange syntax, we just need a
simple calculator.
* it needs to strictly follow Golang template's behavior, for example,
Golang template treats all non-zero values as truth, but many 3rd
packages don't do so.

### What's the benefit?

* Developers don't need to add more `Add`/`Mul`/`Sub`-like functions,
they were getting more and more.
Now, only one `Eval` is enough for all cases.
* The new code reads better than old `{{Add (Mul $glyph.Row 12) 12}}`,
the old one isn't familiar to most procedural programming developers
(eg, the Golang expression syntax).
* The `Eval` is fully covered by tests, many old `Add`/`Mul`-like
functions were never tested.

### The performance?

It doesn't use `reflect`, it doesn't need to parse or compile when used
in Golang template, the performance is as fast as native Go template.

### Is it too complex? Could it be unstable?

The expression calculator program is a common homework for computer
science students, and it's widely used as a teaching and practicing
purpose for developers. The algorithm is pretty well-known.

The behavior can be clearly defined, it is stable.
2023-04-07 21:25:49 +08:00

208 lines
6.2 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package base
import (
"os"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func TestEncodeMD5(t *testing.T) {
assert.Equal(t,
"3858f62230ac3c915f300c664312c63f",
EncodeMD5("foobar"),
)
}
func TestEncodeSha1(t *testing.T) {
assert.Equal(t,
"8843d7f92416211de9ebb963ff4ce28125932878",
EncodeSha1("foobar"),
)
}
func TestEncodeSha256(t *testing.T) {
assert.Equal(t,
"c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2",
EncodeSha256("foobar"),
)
}
func TestShortSha(t *testing.T) {
assert.Equal(t, "veryverylo", ShortSha("veryverylong"))
}
func TestBasicAuthDecode(t *testing.T) {
_, _, err := BasicAuthDecode("?")
assert.Equal(t, "illegal base64 data at input byte 0", err.Error())
user, pass, err := BasicAuthDecode("Zm9vOmJhcg==")
assert.NoError(t, err)
assert.Equal(t, "foo", user)
assert.Equal(t, "bar", pass)
_, _, err = BasicAuthDecode("aW52YWxpZA==")
assert.Error(t, err)
_, _, err = BasicAuthDecode("invalid")
assert.Error(t, err)
}
func TestBasicAuthEncode(t *testing.T) {
assert.Equal(t, "Zm9vOmJhcg==", BasicAuthEncode("foo", "bar"))
assert.Equal(t, "MjM6IjotLS0t", BasicAuthEncode("23:\"", "----"))
}
func TestVerifyTimeLimitCode(t *testing.T) {
tc := []struct {
data string
minutes int
code string
valid bool
}{{
data: "data",
minutes: 2,
code: testCreateTimeLimitCode(t, "data", 2),
valid: true,
}, {
data: "abc123-ß",
minutes: 1,
code: testCreateTimeLimitCode(t, "abc123-ß", 1),
valid: true,
}, {
data: "data",
minutes: 2,
code: "2021012723240000005928251dac409d2c33a6eb82c63410aaad569bed",
valid: false,
}}
for _, test := range tc {
actualValid := VerifyTimeLimitCode(test.data, test.minutes, test.code)
assert.Equal(t, test.valid, actualValid, "data: '%s' code: '%s' should be valid: %t", test.data, test.code, test.valid)
}
}
func testCreateTimeLimitCode(t *testing.T, data string, m int) string {
result0 := CreateTimeLimitCode(data, m, nil)
result1 := CreateTimeLimitCode(data, m, time.Now().Format("200601021504"))
result2 := CreateTimeLimitCode(data, m, time.Unix(time.Now().Unix()+int64(time.Minute)*int64(m), 0).Format("200601021504"))
assert.Equal(t, result0, result1)
assert.NotEqual(t, result0, result2)
assert.True(t, len(result0) != 0)
return result0
}
func TestFileSize(t *testing.T) {
var size int64 = 512
assert.Equal(t, "512 B", FileSize(size))
size *= 1024
assert.Equal(t, "512 KiB", FileSize(size))
size *= 1024
assert.Equal(t, "512 MiB", FileSize(size))
size *= 1024
assert.Equal(t, "512 GiB", FileSize(size))
size *= 1024
assert.Equal(t, "512 TiB", FileSize(size))
size *= 1024
assert.Equal(t, "512 PiB", FileSize(size))
size *= 4
assert.Equal(t, "2.0 EiB", FileSize(size))
}
func TestEllipsisString(t *testing.T) {
assert.Equal(t, "...", EllipsisString("foobar", 0))
assert.Equal(t, "...", EllipsisString("foobar", 1))
assert.Equal(t, "...", EllipsisString("foobar", 2))
assert.Equal(t, "...", EllipsisString("foobar", 3))
assert.Equal(t, "f...", EllipsisString("foobar", 4))
assert.Equal(t, "fo...", EllipsisString("foobar", 5))
assert.Equal(t, "foobar", EllipsisString("foobar", 6))
assert.Equal(t, "foobar", EllipsisString("foobar", 10))
assert.Equal(t, "测...", EllipsisString("测试文本一二三四", 4))
assert.Equal(t, "测试...", EllipsisString("测试文本一二三四", 5))
assert.Equal(t, "测试文...", EllipsisString("测试文本一二三四", 6))
assert.Equal(t, "测试文本一二三四", EllipsisString("测试文本一二三四", 10))
}
func TestTruncateString(t *testing.T) {
assert.Equal(t, "", TruncateString("foobar", 0))
assert.Equal(t, "f", TruncateString("foobar", 1))
assert.Equal(t, "fo", TruncateString("foobar", 2))
assert.Equal(t, "foo", TruncateString("foobar", 3))
assert.Equal(t, "foob", TruncateString("foobar", 4))
assert.Equal(t, "fooba", TruncateString("foobar", 5))
assert.Equal(t, "foobar", TruncateString("foobar", 6))
assert.Equal(t, "foobar", TruncateString("foobar", 7))
assert.Equal(t, "测试文本", TruncateString("测试文本一二三四", 4))
assert.Equal(t, "测试文本一", TruncateString("测试文本一二三四", 5))
assert.Equal(t, "测试文本一二", TruncateString("测试文本一二三四", 6))
assert.Equal(t, "测试文本一二三", TruncateString("测试文本一二三四", 7))
}
func TestStringsToInt64s(t *testing.T) {
testSuccess := func(input []string, expected []int64) {
result, err := StringsToInt64s(input)
assert.NoError(t, err)
assert.Equal(t, expected, result)
}
testSuccess([]string{}, []int64{})
testSuccess([]string{"-1234"}, []int64{-1234})
testSuccess([]string{"1", "4", "16", "64", "256"},
[]int64{1, 4, 16, 64, 256})
_, err := StringsToInt64s([]string{"-1", "a", "$"})
assert.Error(t, err)
}
func TestInt64sToStrings(t *testing.T) {
assert.Equal(t, []string{}, Int64sToStrings([]int64{}))
assert.Equal(t,
[]string{"1", "4", "16", "64", "256"},
Int64sToStrings([]int64{1, 4, 16, 64, 256}),
)
}
func TestInt64sContains(t *testing.T) {
assert.True(t, Int64sContains([]int64{6, 44324, 4324, 32, 1, 2323}, 1))
assert.True(t, Int64sContains([]int64{2323}, 2323))
assert.False(t, Int64sContains([]int64{6, 44324, 4324, 32, 1, 2323}, 232))
}
func TestIsLetter(t *testing.T) {
assert.True(t, IsLetter('a'))
assert.True(t, IsLetter('e'))
assert.True(t, IsLetter('q'))
assert.True(t, IsLetter('z'))
assert.True(t, IsLetter('A'))
assert.True(t, IsLetter('E'))
assert.True(t, IsLetter('Q'))
assert.True(t, IsLetter('Z'))
assert.True(t, IsLetter('_'))
assert.False(t, IsLetter('-'))
assert.False(t, IsLetter('1'))
assert.False(t, IsLetter('$'))
assert.False(t, IsLetter(0x00))
assert.False(t, IsLetter(0x93))
}
// TODO: Test EntryIcon
func TestSetupGiteaRoot(t *testing.T) {
_ = os.Setenv("GITEA_ROOT", "test")
assert.Equal(t, "test", SetupGiteaRoot())
_ = os.Setenv("GITEA_ROOT", "")
assert.NotEqual(t, "test", SetupGiteaRoot())
}
func TestFormatNumberSI(t *testing.T) {
assert.Equal(t, "125", FormatNumberSI(int(125)))
assert.Equal(t, "1.3k", FormatNumberSI(int64(1317)))
assert.Equal(t, "21.3M", FormatNumberSI(21317675))
assert.Equal(t, "45.7G", FormatNumberSI(45721317675))
assert.Equal(t, "", FormatNumberSI("test"))
}