Restore default format

Only use github-actions format if format is set to testname. The current default
pkgname is much more compact. Maybe we could add a github-actions-pkgname format
in the future that folds the entire package.

For now it seems safe to use github-actions instead of pkgname if the GITHUB_ACTIONS
environment variable is set.  If someone really wants the output expanded by default
they can unset or overwrite that env var for the 'gotestsum' process.

.github/workflows/ci.yaml

@@ -14,4 +14,4 @@ jobs:
           go-version: '1.20'
           cache: true
       - run: go build .
-      - run: ./gotestsum
+      - run: ./gotestsum -f testname

cmd/main.go

@@ -56,12 +56,9 @@ func setupFlags(name string) (*pflag.FlagSet, *options) {
 	flags.Usage = func() {
 		usage(os.Stdout, name, flags)
 	}
-	defaultFormat := "pkgname"
-	if os.Getenv("GITHUB_ACTIONS") == "true" {
-		defaultFormat = "github-actions"
-	}
+
 	flags.StringVarP(&opts.format, "format", "f",
-		lookEnvWithDefault("GOTESTSUM_FORMAT", defaultFormat),
+		lookEnvWithDefault("GOTESTSUM_FORMAT", "pkgname"),
 		"print format of test input")
 	flags.BoolVar(&opts.formatOptions.HideEmptyPackages, "format-hide-empty-pkg",
 		false, "do not print empty packages in compact formats")
@@ -143,6 +140,7 @@ Formats:
     pkgname                  print a line for each package
     pkgname-and-test-fails   print a line for each package and failed test output
     testname                 print a line for each test and package
+    github-actions           testname format with github actions log grouping
     standard-quiet           standard go test format
     standard-verbose         standard go test -v format
 

testjson/format.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"fmt"
 	"io"
+	"os"
 	"strings"
 
 	"github.com/fatih/color"
@@ -312,6 +313,9 @@ func NewEventFormatter(out io.Writer, format string, formatOpts FormatOptions) E
 	case "dots-v2":
 		return newDotFormatter(out, formatOpts)
 	case "testname", "short-verbose":
+		if os.Getenv("GITHUB_ACTIONS") == "true" {
+			return githubActionsFormat(out)
+		}
 		return testNameFormat(out)
 	case "pkgname", "short":
 		return pkgNameFormat(out, formatOpts)