in_toto_test.go

Documentation: github.com/in-toto/in-toto-golang/in_toto

     1  package in_toto
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"path/filepath"
     7  	"testing"
     8  )
     9  
    10  const testData = "../test/data"
    11  
    12  // TestMain calls all Test*'s of this package (in_toto) explicitly with m.Run
    13  // This can be used for test setup and teardown, e.g. copy test data to a tmp
    14  // test dir, change to that dir and remove the and contents in the end
    15  func TestMain(m *testing.M) {
    16  	testDir, err := os.MkdirTemp("", "in_toto_test_dir")
    17  	if err != nil {
    18  		panic("Cannot create temp test dir")
    19  	}
    20  
    21  	// Copy test files to temp test directory
    22  	// NOTE: Only works for a flat directory of files
    23  	testFiles, _ := filepath.Glob(filepath.Join(testData, "*"))
    24  	for _, inputPath := range testFiles {
    25  		input, err := os.ReadFile(inputPath)
    26  		if err != nil {
    27  			panic(fmt.Sprintf("Cannot copy test files (read error: %s)", err))
    28  		}
    29  		outputPath := filepath.Join(testDir, filepath.Base(inputPath))
    30  		err = os.WriteFile(outputPath, input, 0644)
    31  		if err != nil {
    32  			panic(fmt.Sprintf("Cannot copy test files (write error: %s)", err))
    33  		}
    34  	}
    35  
    36  	cwd, _ := os.Getwd()
    37  	err = os.Chdir(testDir)
    38  	if err != nil {
    39  		fmt.Printf("Unable to change dir to %s: %s", testDir, err)
    40  	}
    41  	// Always change back to where we were and remove the temp directory
    42  	defer func(cwd string) {
    43  		if err := os.Chdir(cwd); err != nil {
    44  			fmt.Printf("Unable to change to directory %s: %s", cwd, err)
    45  		}
    46  	}(cwd)
    47  	defer func(testDir string) {
    48  		if err := os.RemoveAll(testDir); err != nil {
    49  			fmt.Printf("Unable to remove directory %s: %s", testDir, err)
    50  		}
    51  	}(testDir)
    52  
    53  	// Run tests
    54  	m.Run()
    55  }
    56
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