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package main
import (
"flag"
"fmt"
"go/importer"
"go/token"
"go/types"
"os"
"path/filepath"
"regexp"
"runtime"
"sort"
"strings"
"unicode"
"unicode/utf8"
)
const (
usageTemplate = "Usage: %s [-benchmarks] [-examples] [-tests] import-path\n"
)
func findObjectByName(pkg *types.Package, re *regexp.Regexp, name string) types.Object {
if pkg != nil && re != nil && len(name) > 0 {
if obj := pkg.Scope().Lookup(name); obj != nil {
if re.MatchString(obj.Type().String()) {
return obj
}
}
}
return nil
}
func isTestName(name, prefix string) bool {
ok := false
if strings.HasPrefix(name, prefix) {
if len(name) == len(prefix) {
ok = true
} else {
rune, _ := utf8.DecodeRuneInString(name[len(prefix):])
ok = !unicode.IsLower(rune)
}
}
return ok
}
func main() {
testsPtr := flag.Bool("tests", false, "report tests")
benchmarksPtr := flag.Bool("benchmarks", false, "report benchmarks")
examplesPtr := flag.Bool("examples", false, "report examples")
flag.Usage = func() {
_, _ = fmt.Fprintf(flag.CommandLine.Output(), usageTemplate, filepath.Base(os.Args[0]))
flag.PrintDefaults()
}
flag.Parse()
// Check if the number of positional parameters matches
args := flag.Args()
argsCount := len(args)
if argsCount != 1 {
exitCode := 0
if argsCount > 1 {
fmt.Println("Error: invalid number of parameters...")
exitCode = 1
}
flag.Usage()
os.Exit(exitCode)
}
importPath := args[0]
var fset token.FileSet
imp := importer.ForCompiler(&fset, runtime.Compiler, nil)
pkg, err := imp.Import(importPath)
if err != nil {
fmt.Printf("Error: %v\n", err)
os.Exit(1)
}
if !*testsPtr && !*benchmarksPtr && !*examplesPtr {
// Nothing to do, just exit normally
os.Exit(0)
}
// // First approach: just dump the package scope as a string
// // package "junk/snermolaev/libmath" scope 0xc0000df540 {
// // . func junk/snermolaev/libmath.Abs(a int) int
// // . func junk/snermolaev/libmath.AbsReport(s string)
// // . func junk/snermolaev/libmath.Sum(a int, b int) int
// // . func junk/snermolaev/libmath.TestAbs(t *testing.T)
// // . func junk/snermolaev/libmath.TestSum(t *testing.T)
// // . func junk/snermolaev/libmath.init()
// // }
// // and then collect all functions that match test function signature
// pkgPath := pkg.Path()
// scopeContent := strings.Split(pkg.Scope().String(), "\n")
// re := regexp.MustCompile("^\\.\\s*func\\s*" + pkgPath + "\\.(Test\\w*)\\(\\s*\\w*\\s*\\*\\s*testing\\.T\\s*\\)$")
// for _, name := range scopeContent {
// match := re.FindAllStringSubmatch(name, -1)
// if len(match) > 0 {
// fmt.Println(match[0][1])
// }
// }
// Second approach: look through all names defined in the pkg scope
// and collect those functions that match test function signature
// Unfortunately I failed to employ reflection mechinary for signature
// comparison for unknown reasons (this needs additional investigation
// I am going to use regexp as workaround for a while)
// testFunc := func (*testing.T) {}
// for ...
// ...
// if reflect.DeepEqual(obj.Type(), reflect.TypeOf(testFunc)) {
// // this condition doesn't work
// }
reBenchmark := regexp.MustCompile(`^func\(\w*\s*\*testing\.B\)$`)
reExample := regexp.MustCompile(`^func\(\s*\)$`)
reTest := regexp.MustCompile(`^func\(\w*\s*\*testing\.T\)$`)
reTestMain := regexp.MustCompile(`^func\(\w*\s*\*testing\.M\)$`)
var re *regexp.Regexp
names := pkg.Scope().Names()
var testFns []types.Object
for _, name := range names {
if name == "TestMain" && findObjectByName(pkg, reTestMain, name) != nil {
fmt.Println("#TestMain")
continue
}
switch {
case *benchmarksPtr && isTestName(name, "Benchmark"):
re = reBenchmark
case *examplesPtr && isTestName(name, "Example"):
re = reExample
case *testsPtr && isTestName(name, "Test"):
re = reTest
default:
continue
}
if obj := findObjectByName(pkg, re, name); obj != nil {
testFns = append(testFns, obj)
}
}
sort.Slice(testFns, func(i, j int) bool {
iPos := testFns[i].Pos()
jPos := testFns[j].Pos()
if !iPos.IsValid() || !jPos.IsValid() {
return iPos < jPos
}
iPosition := fset.PositionFor(iPos, true)
jPosition := fset.PositionFor(jPos, true)
return iPosition.Filename < jPosition.Filename ||
(iPosition.Filename == jPosition.Filename && iPosition.Line < jPosition.Line)
})
for _, testFn := range testFns {
fmt.Println(testFn.Name())
}
}
|
