don't analyze tests by default

internal/commands/run.go

@@ -88,6 +88,7 @@ func (e *Executor) initRun() {
 	runCmd.Flags().BoolVarP(&rc.Diff, "new", "n", false, "Show only new issues: if there are unstaged changes or untracked files, only those changes are shown, else only changes in HEAD~ are shown")
 	runCmd.Flags().StringVar(&rc.DiffFromRevision, "new-from-rev", "", "Show only new issues created after git revision `REV`")
 	runCmd.Flags().StringVar(&rc.DiffPatchFilePath, "new-from-patch", "", "Show only new issues created in git patch with file path `PATH`")
+	runCmd.Flags().BoolVar(&rc.AnalyzeTests, "tests", false, "Analyze tests (*_test.go)")
 }
 
 func isFullImportNeeded(linters []pkg.Linter) bool {
@@ -128,8 +129,7 @@ func loadWholeAppIfNeeded(ctx context.Context, linters []pkg.Linter, cfg *config
 		Build:       &bctx,
 		AllowErrors: true, // Try to analyze event partially
 	}
-	const needTests = true // TODO: configure and take into account in paths resolver
-	rest, err := loadcfg.FromArgs(paths.MixedPaths(), needTests)
+	rest, err := loadcfg.FromArgs(paths.MixedPaths(), cfg.AnalyzeTests)
 	if err != nil {
 		return nil, nil, fmt.Errorf("can't parepare load config with paths: %s", err)
 	}
@@ -162,7 +162,7 @@ func buildLintCtx(ctx context.Context, linters []pkg.Linter, cfg *config.Config)
 		args = []string{"./..."}
 	}
 
-	paths, err := fsutils.GetPathsForAnalysis(ctx, args)
+	paths, err := fsutils.GetPathsForAnalysis(ctx, args, cfg.Run.AnalyzeTests)
 	if err != nil {
 		return nil, err
 	}

pkg/config/config.go

@@ -92,6 +92,8 @@ type Run struct { // nolint:maligned
 	DiffFromRevision  string
 	DiffPatchFilePath string
 	Diff              bool
+
+	AnalyzeTests bool
 }
 
 type Config struct {

pkg/fsutils/fsutils.go

@@ -55,7 +55,7 @@ func processPaths(root string, paths []string, maxPaths int) ([]string, error) {
 	return ret, nil
 }
 
-func GetPathsForAnalysis(ctx context.Context, inputPaths []string) (ret *ProjectPaths, err error) {
+func GetPathsForAnalysis(ctx context.Context, inputPaths []string, includeTests bool) (ret *ProjectPaths, err error) {
 	defer func(startedAt time.Time) {
 		if ret != nil {
 			logrus.Infof("Found paths for analysis for %s: %s", time.Since(startedAt), ret.MixedPaths())
@@ -69,7 +69,7 @@ func GetPathsForAnalysis(ctx context.Context, inputPaths []string) (ret *Project
 	}
 
 	excludeDirs := []string{"vendor", "testdata", "examples", "Godeps", "builtin"}
-	pr := NewPathResolver(excludeDirs, []string{".go"})
+	pr := NewPathResolver(excludeDirs, []string{".go"}, includeTests)
 	paths, err := pr.Resolve(inputPaths...)
 	if err != nil {
 		return nil, fmt.Errorf("can't resolve paths: %s", err)

pkg/fsutils/path_resolver.go

@@ -11,6 +11,7 @@ import (
 type PathResolver struct {
 	excludeDirs           map[string]bool
 	allowedFileExtensions map[string]bool
+	includeTests          bool
 }
 
 type pathResolveState struct {
@@ -56,7 +57,7 @@ func (s pathResolveState) toResult() *PathResolveResult {
 	return res
 }
 
-func NewPathResolver(excludeDirs, allowedFileExtensions []string) *PathResolver {
+func NewPathResolver(excludeDirs, allowedFileExtensions []string, includeTests bool) *PathResolver {
 	excludeDirsMap := map[string]bool{}
 	for _, dir := range excludeDirs {
 		excludeDirsMap[dir] = true
@@ -70,6 +71,7 @@ func NewPathResolver(excludeDirs, allowedFileExtensions []string) *PathResolver
 	return &PathResolver{
 		excludeDirs:           excludeDirsMap,
 		allowedFileExtensions: allowedFileExtensionsMap,
+		includeTests:          includeTests,
 	}
 }
 
@@ -89,6 +91,10 @@ func (pr PathResolver) isIgnoredDir(dir string) bool {
 }
 
 func (pr PathResolver) isAllowedFile(path string) bool {
+	if !pr.includeTests && strings.HasSuffix(path, "_test.go") {
+		return false
+	}
+
 	return pr.allowedFileExtensions[filepath.Ext(path)]
 }
 

pkg/fsutils/path_resolver_test.go

@@ -54,7 +54,7 @@ func prepareFS(t *testing.T, paths ...string) *fsPreparer {
 }
 
 func newPR() *PathResolver {
-	return NewPathResolver([]string{}, []string{})
+	return NewPathResolver([]string{}, []string{}, false)
 }
 
 func TestPathResolverNoPaths(t *testing.T) {
@@ -72,11 +72,12 @@ func TestPathResolverNotExistingPath(t *testing.T) {
 
 func TestPathResolverCommonCases(t *testing.T) {
 	type testCase struct {
-		name     string
-		prepare  []string
-		resolve  []string
-		expFiles []string
-		expDirs  []string
+		name         string
+		prepare      []string
+		resolve      []string
+		expFiles     []string
+		expDirs      []string
+		includeTests bool
 	}
 
 	testCases := []testCase{
@@ -154,6 +155,28 @@ func TestPathResolverCommonCases(t *testing.T) {
 			resolve: []string{"./..."},
 			expDirs: []string{"."},
 		},
+		{
+			name:         "include tests",
+			prepare:      []string{"a/b.go", "a/b_test.go"},
+			resolve:      []string{"./..."},
+			expDirs:      []string{".", "a"},
+			expFiles:     []string{"a/b.go", "a/b_test.go"},
+			includeTests: true,
+		},
+		{
+			name:     "exclude tests",
+			prepare:  []string{"a/b.go", "a/b_test.go"},
+			resolve:  []string{"./..."},
+			expDirs:  []string{".", "a"},
+			expFiles: []string{"a/b.go"},
+		},
+		{
+			name:     "exclude tests except explicitly set",
+			prepare:  []string{"a/b.go", "a/b_test.go", "a/c_test.go"},
+			resolve:  []string{"./...", "a/c_test.go"},
+			expDirs:  []string{".", "a"},
+			expFiles: []string{"a/b.go", "a/c_test.go"},
+		},
 	}
 
 	for _, tc := range testCases {
@@ -161,7 +184,7 @@ func TestPathResolverCommonCases(t *testing.T) {
 			fp := prepareFS(t, tc.prepare...)
 			defer fp.clean()
 
-			pr := NewPathResolver([]string{"vendor"}, []string{".go"})
+			pr := NewPathResolver([]string{"vendor"}, []string{".go"}, tc.includeTests)
 			res, err := pr.Resolve(tc.resolve...)
 			assert.NoError(t, err)
 

pkg/golinters/golint.go

@@ -20,7 +20,7 @@ func (Golint) Name() string {
 func (g Golint) Run(ctx context.Context, lintCtx *Context) ([]result.Issue, error) {
 	var issues []result.Issue
 	if lintCtx.Paths.IsDirsRun {
-		for _, path := range lintCtx.Paths.Dirs {
+		for _, path := range lintCtx.Paths.Dirs { // TODO: support exclusion of test files
 			i, err := lintDir(path, lintCtx.RunCfg().Golint.MinConfidence)
 			if err != nil {
 				// TODO: skip and warn