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Testing with Local Files in Go
When testing functionality that relies on local files, the best practice in Go is to use a dedicated folder named testdata. This folder is ignored by the go tool, as explained in the documentation (type go help packages).
Advantages of Using testdata:
Structure of testdata Folder:
Create a folder named testdata in the same directory as your Go package. You can then place any test files within this folder.
Reading Files from testdata:
To read files from the testdata folder, use the following code:
<code class="go">package mypackage import ( "io/ioutil" "os" "path/filepath" ) func readLocalFile(filename string) ([]byte, error) { pwd, err := os.Getwd() if err != nil { return nil, err } path := filepath.Join(pwd, "testdata", filename) return ioutil.ReadFile(path) }</code>
Replace filename with the name of the file you want to read.
Alternative Approaches:
While using testdata is the recommended approach, you can also consider other options:
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