pdewey.com
Approval-based snapshot testing library for Go (mirror)
fix: fix freeze.go
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README.md
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README.md
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A [birdie](https://github.com/giacomocavalieri/birdie) and [insta](https://github.com/mitsuhiko/insta) inspired snapshot testing library for Go.
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TODO: screenshot
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## Installation
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TODO:
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```sh
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go get github.com/ptdewey/freeze
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```
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## Usage
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TODO:
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```go
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package yourpackage_test
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func TestSomething(t *testing.T) {
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result := SomeFunction("foo")
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freeze.Snap(t, result)
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// To capture the calling function name use SnapFunc
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freeze.SnapFunc(t, SomeFunction("bar"))
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}
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```
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To review a set of snapshots, run:
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```sh
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go run github.com/ptdewey/freeze/cmd/freeze review
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```
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## Disclaimer
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__snapshots__/test_snap_func.snap
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__snapshots__/test_snap_func.snap
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__snapshots__/test_snap_func_another_helper.snap
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__snapshots__/test_snap_func_another_helper.snap
__snapshots__/test_snap_string.snap
__snapshots__/test_snap_string.snap.new
__snapshots__/test_snap_string.snap
__snapshots__/test_snap_string.snap.new
assets/screenshot-new.png
assets/screenshot-new.png
This is a binary file and will not be displayed.
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freeze.go
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freeze.go
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func SnapFunc(t testingT, values ...any) {
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t.Helper()
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pc, _, _, _ := runtime.Caller(1)
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fn := runtime.FuncForPC(pc)
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funcName := "unknown"
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if fn != nil {
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fullName := fn.Name()
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parts := len(fullName) - 1
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for i := len(fullName) - 1; i >= 0; i-- {
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if fullName[i] == '.' {
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parts = i + 1
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break
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}
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}
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funcName = fullName[parts:]
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}
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content := formatValues(values...)
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snapWithTitle(t, t.Name(), content, t.Name())
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snapWithTitle(t, funcName, content)
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}
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func SnapFuncWithName(t testingT, funcName string, values ...any) {
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t.Helper()
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content := formatValues(values...)
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snapWithTitle(t, t.Name(), content, funcName)
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func getFunctionName() string {
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pc, _, _, _ := runtime.Caller(2)
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fn := runtime.FuncForPC(pc)
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if fn == nil {
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return "unknown"
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}
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fullName := fn.Name()
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parts := len(fullName) - 1
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for i := len(fullName) - 1; i >= 0; i-- {
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if fullName[i] == '.' {
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parts = i + 1
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break
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}
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}
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return fullName[parts:]
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}
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func snap(t testingT, content string) {
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snapWithTitle(t, testName, content)
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}
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func snapWithTitle(t testingT, title string, content string, funcName ...string) {
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func snapWithTitle(t testingT, title string, content string) {
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t.Helper()
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_, filePath, _, _ := runtime.Caller(2)
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Name: title,
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FilePath: filePath,
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Content: content,
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}
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if len(funcName) > 0 && funcName[0] != "" {
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snapshot.FuncName = funcName[0]
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}
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accepted, err := files.ReadAccepted(title)
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return
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}
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if len(funcName) > 0 && funcName[0] != "" {
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fmt.Println(pretty.NewSnapshotBoxFunc(snapshot))
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} else {
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fmt.Println(pretty.NewSnapshotBox(snapshot))
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}
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fmt.Println(pretty.NewSnapshotBox(snapshot))
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t.Error("new snapshot created - run 'freeze review' to accept")
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}
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freeze_test.go
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freeze_test.go
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}
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func TestSnapFunc(t *testing.T) {
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freeze.SnapFuncWithName(t, "testHelperFunction", testHelperFunction())
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freeze.SnapFunc(t, testHelperFunction())
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}
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func TestSnapFuncAnotherHelper(t *testing.T) {
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freeze.SnapFuncWithName(t, "calculateSomething", calculateSomething(5))
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freeze.SnapFunc(t, calculateSomething(5))
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}
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func calculateSomething(n int) int {