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main_test.go
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285 lines (261 loc) · 6.84 KB
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package main
import (
"bytes"
"io"
"os"
"reflect"
"regexp"
"strings"
"testing"
"github.com/kisielk/errcheck/errcheck"
)
var dotStar = regexp.MustCompile(".*")
func TestMain(t *testing.T) {
saveStderr := os.Stderr
saveStdout := os.Stdout
saveCwd, err := os.Getwd()
if err != nil {
t.Errorf("Cannot receive current directory: %v", err)
}
r, w, err := os.Pipe()
if err != nil {
t.Errorf("Cannot create pipe: %v", err)
}
os.Stderr = w
os.Stdout = w
bufChannel := make(chan string)
go func() {
buf := new(bytes.Buffer)
_, err = io.Copy(buf, r)
r.Close()
if err != nil {
t.Errorf("Cannot copy to buffer: %v", err)
}
bufChannel <- buf.String()
}()
exitCode := mainCmd([]string{"cmd name", "github.com/kisielk/errcheck/testdata"})
w.Close()
os.Stderr = saveStderr
os.Stdout = saveStdout
os.Chdir(saveCwd)
out := <-bufChannel
if exitCode != exitUncheckedError {
t.Errorf("Exit code is %d, expected %d", exitCode, exitUncheckedError)
}
expectUnchecked := 29
if got := strings.Count(out, "UNCHECKED"); got != expectUnchecked {
t.Errorf("Got %d UNCHECKED errors, expected %d in:\n%s", got, expectUnchecked, out)
}
}
type parseTestCase struct {
args []string
paths []string
ignore map[string]string // Exclusions.SymbolRegexpsByPackage
pkgs []string // Exclusions.Packages
tags []string // Tags
blank bool // !BlankAssignments
asserts bool // !TypeAssertions
error int
}
func TestParseFlags(t *testing.T) {
cases := []parseTestCase{
parseTestCase{
args: []string{"errcheck"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{},
tags: []string{},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-blank", "-asserts"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{},
tags: []string{},
blank: true,
asserts: true,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "foo", "bar"},
paths: []string{"foo", "bar"},
ignore: map[string]string{},
pkgs: []string{},
tags: []string{},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-ignore", "fmt:.*,encoding/binary:.*"},
paths: []string{"."},
ignore: map[string]string{"fmt": ".*", "encoding/binary": dotStar.String()},
pkgs: []string{},
tags: []string{},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-ignore", "fmt:[FS]?[Pp]rint*"},
paths: []string{"."},
ignore: map[string]string{"fmt": "[FS]?[Pp]rint*"},
pkgs: []string{},
tags: []string{},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-ignore", "[rR]ead|[wW]rite"},
paths: []string{"."},
ignore: map[string]string{"": "[rR]ead|[wW]rite"},
pkgs: []string{},
tags: []string{},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-ignorepkg", "testing"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{"testing"},
tags: []string{},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-ignorepkg", "testing,foo"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{"testing", "foo"},
tags: []string{},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-tags", "foo"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{},
tags: []string{"foo"},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-tags", "foo bar !baz"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{},
tags: []string{"foo", "bar", "!baz"},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-tags", "foo,bar,!baz"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{},
tags: []string{"foo", "bar", "!baz"},
blank: false,
asserts: false,
error: exitCodeOk,
},
parseTestCase{
args: []string{"errcheck", "-tags", "foo bar !baz"},
paths: []string{"."},
ignore: map[string]string{},
pkgs: []string{},
tags: []string{"foo", "bar", "!baz"},
blank: false,
asserts: false,
error: exitCodeOk,
},
}
slicesEqual := func(a, b []string) bool {
if len(a) != len(b) {
return false
}
for i := range a {
if a[i] != b[i] {
return false
}
}
return true
}
ignoresEqual := func(a map[string]*regexp.Regexp, b map[string]string) bool {
if (a == nil && b != nil) || (a != nil && b == nil) || (len(a) != len(b)) {
return false
}
for k, v := range a {
if v.String() != b[k] {
return false
}
}
return true
}
for _, c := range cases {
var checker errcheck.Checker
p, e := parseFlags(&checker, c.args)
argsStr := strings.Join(c.args, " ")
if !slicesEqual(p, c.paths) {
t.Errorf("%q: path got %q want %q", argsStr, p, c.paths)
}
if ign := checker.Exclusions.SymbolRegexpsByPackage; !ignoresEqual(ign, c.ignore) {
t.Errorf("%q: ignore got %q want %q", argsStr, ign, c.ignore)
}
if pkgs := checker.Exclusions.Packages; !slicesEqual(pkgs, c.pkgs) {
t.Errorf("%q: packages got %v want %v", argsStr, pkgs, c.pkgs)
}
if tags := checker.Tags; !slicesEqual(tags, c.tags) {
t.Errorf("%q: tags got %v want %v", argsStr, tags, c.tags)
}
if b := checker.Exclusions.BlankAssignments; b != !c.blank {
t.Errorf("%q: BlankAssignments got %v want %v", argsStr, b, !c.blank)
}
if a := checker.Exclusions.TypeAssertions; a != !c.asserts {
t.Errorf("%q: TypeAssertions got %v want %v", argsStr, a, !c.asserts)
}
if e != c.error {
t.Errorf("%q: error got %q want %q", argsStr, e, c.error)
}
}
}
func TestReadExcludes(t *testing.T) {
expectedExcludes := []string{
"hello()",
"world()",
}
t.Logf("expectedExcludes: %#v", expectedExcludes)
excludes, err := readExcludes("testdata/excludes.txt")
if err != nil {
t.Fatal(err)
}
t.Logf("excludes: %#v", excludes)
if !reflect.DeepEqual(expectedExcludes, excludes) {
t.Fatal("excludes did not match expectedExcludes")
}
}
func TestReadEmptyExcludes(t *testing.T) {
excludes, err := readExcludes("testdata/empty_excludes.txt")
if err != nil {
t.Fatal(err)
}
if len(excludes) != 0 {
t.Fatalf("expected empty excludes, got %#v", excludes)
}
}
func TestReadExcludesMissingFile(t *testing.T) {
_, err := readExcludes("testdata/missing_file")
if err == nil {
t.Fatal("expected non-nil err, got nil")
}
}