ignore hidden files

Hidden files are defined here as those beginning with '.' or '_'.

This is a departure from previous behavior, where hidden source and test files
were evaluated via watch. Evaluating hidden files is undesirable because some
editors create hidden temporary files, and these files shouldn't trigger test
runs.

No flag is added to restore the original behavior at this time as the new
behavior is the same as "go test", and it is not expected that it will cause
problems. If this change affects you, consider opening a PR to add a CLI flag
to restore the previous behavior.

ginkgo/watch/package_hash.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"regexp"
+	"strings"
 	"time"
 )
 
@@ -79,6 +80,10 @@ func (p *PackageHash) computeHashes() (codeHash string, codeModifiedTime time.Ti
 			continue
 		}
 
+		if isHiddenFile(info) {
+			continue
+		}
+
 		if goTestRegExp.MatchString(info.Name()) {
 			testHash += p.hashForFileInfo(info)
 			if info.ModTime().After(testModifiedTime) {
@@ -103,6 +108,10 @@ func (p *PackageHash) computeHashes() (codeHash string, codeModifiedTime time.Ti
 	return
 }
 
+func isHiddenFile(info os.FileInfo) bool {
+	return strings.HasPrefix(info.Name(), ".") || strings.HasPrefix(info.Name(), "_")
+}
+
 func (p *PackageHash) hashForFileInfo(info os.FileInfo) string {
 	return fmt.Sprintf("%s_%d_%d", info.Name(), info.Size(), info.ModTime().UnixNano())
 }

integration/watch_test.go

@@ -20,6 +20,18 @@ var _ = Describe("Watch", Label("SLOW"), func() {
 		fm.MountFixture("watch", "C")
 	})
 
+	createFile := func(path string, contents []byte) {
+		time.Sleep(time.Second)
+		err := os.WriteFile(path, contents, 0666)
+		Ω(err).ShouldNot(HaveOccurred())
+	}
+
+	createHiddenTest := func(pkgToModify string) {
+		path := filepath.Join(pkgToModify, ".#"+pkgToModify+"_test.go")
+		fm.MkEmpty(filepath.Join("watch", pkgToModify))
+		createFile(fm.PathTo("watch", path), []byte("//"))
+	}
+
 	modifyFile := func(path string) {
 		time.Sleep(time.Second)
 		content, err := os.ReadFile(path)
@@ -185,6 +197,19 @@ var _ = Describe("Watch", Label("SLOW"), func() {
 			Eventually(session).Should(gbytes.Say("C Suite"))
 			Consistently(session).ShouldNot(gbytes.Say("A Suite|B Suite"))
 		})
+
+		Context("when a hidden test file is created", func() {
+			It("shouldn't trigger the test suite", func() {
+				session = startGinkgo(fm.PathTo("watch"), "watch", "-r")
+				Eventually(session).Should(gbytes.Say("Identified 3 test suites"))
+				Eventually(session).Should(gbytes.Say(`A \[`))
+				Eventually(session).Should(gbytes.Say(`B \[`))
+				Eventually(session).Should(gbytes.Say(`C \[`))
+
+				createHiddenTest("A")
+				Consistently(session).ShouldNot(gbytes.Say("Detected changes in"))
+			})
+		})
 	})
 
 	Describe("adjusting the watch regular expression", func() {