feat: gno test support /... pattern (gnolang#1078)

BREAKING CHANGE: Altered behavior of the `gno test` command

Adds support for `/...` pattern in `gno test` command. Now args can have
`/...` pattern in the directory path.

Using `gno test ./path/to/pkg` would trigger the execution of test files
solely within the specified package directory, excluding any
subdirectories like `./path/to/pkg/subpkg`.

To execute test files within subdirectories as well, use `gno test
./path/to/pkg/...`

It supports all variations of `/...` such as `./path/.../pkg`,
`./.../pkg`, ,`./.../path/...` and more


<details><summary>Contributors' checklist...</summary>

- [x] Added new tests, or not needed, or not feasible
- [x] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [x] Updated the official documentation or not needed
- [x] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [x] Added references to related issues and PRs
- [x] Provided any useful hints for running manual tests
- [ ] Added new benchmarks to [generated
graphs](https://gnoland.github.io/benchmarks), if any. More info
[here](https://github.com/gnolang/gno/blob/master/.benchmarks/README.md).
</details>

.github/workflows/examples.yml

@@ -50,7 +50,7 @@ jobs:
         with:
           go-version: ${{ matrix.goversion }}
       - run: go install -v ./gnovm/cmd/gno
-      - run: go run ./gnovm/cmd/gno test --verbose ./examples
+      - run: go run ./gnovm/cmd/gno test --verbose ./examples/...
   lint:
     strategy:
       fail-fast: false

examples/Makefile

@@ -19,15 +19,15 @@ build: precompile
 
 .PHONY: test
 test:
-	go run ../gnovm/cmd/gno test --verbose .
+	go run ../gnovm/cmd/gno test --verbose ./...
 
 .PHONY: lint
 lint:
 	go run ../gnovm/cmd/gno lint $(OFFICIAL_PACKAGES)
 
 .PHONY: test.sync
 test.sync:
-	go run ../gnovm/cmd/gno test --verbose --update-golden-tests .
+	go run ../gnovm/cmd/gno test --verbose --update-golden-tests ./...
 
 .PHONY: clean
 clean:

gnovm/cmd/gno/test.go

@@ -50,7 +50,7 @@ func newTestCmd(io *commands.IO) *commands.Command {
 'gno test' recompiles each package along with any files with names matching the
 file pattern "*_test.gno" or "*_filetest.gno".
 
-The only <package> supported for now is a directory (relative or absolute).
+The <package> can be directory or file path (relative or absolute).
 
 - "*_test.gno" files work like "*_test.go" files, but they contain only test
 functions. Benchmark and fuzz functions aren't supported yet. Similarly, only
@@ -182,9 +182,9 @@ func execTest(cfg *testCfg, args []string, io *commands.IO) error {
 		cfg.rootDir = guessRootDir()
 	}
 
-	paths, err := gnoPackagesFromArgs(args)
+	paths, err := targetsFromPatterns(args)
 	if err != nil {
-		return fmt.Errorf("list package paths from args: %w", err)
+		return fmt.Errorf("list targets from patterns: %w", err)
 	}
 	if len(paths) == 0 {
 		io.ErrPrintln("no packages to test")

gnovm/cmd/gno/testdata/gno_test/empty_dir.txtar

@@ -2,5 +2,10 @@
 
 gno test .
 
+! stdout .+
+stderr '[no test files]'
+
+gno test ./...
+
 ! stdout .+
 stderr 'no packages to test'

gnovm/cmd/gno/testdata/gno_test/empty_gno1.txtar

@@ -3,7 +3,7 @@
 gno test .
 
 ! stdout .+
-stderr '\?       \./\. 	\[no test files\]'
+stderr '\?       \. 	\[no test files\]'
 
 ! gno test --precompile .
 

gnovm/cmd/gno/testdata/gno_test/error_correct.txtar

@@ -5,7 +5,7 @@ gno test -verbose .
 stdout 'Machine\.RunMain\(\) panic: oups'
 stderr '=== RUN   file/x_filetest.gno'
 stderr '--- PASS: file/x_filetest.gno \(\d\.\d\ds\)'
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 -- x_filetest.gno --
 package main

gnovm/cmd/gno/testdata/gno_test/failing_filetest.txtar

@@ -9,8 +9,8 @@ stderr 'panic: fail on failing_filetest.gno: got unexpected error: beep boop'
 ! gno test -verbose --precompile .
 
 stdout 'Machine.RunMain\(\) panic: beep boop'
-stderr '=== PREC  \./\.'
-stderr '=== BUILD \./\.'
+stderr '=== PREC  \.'
+stderr '=== BUILD \.'
 stderr '=== RUN   file/failing_filetest.gno'
 stderr 'panic: fail on failing_filetest.gno: got unexpected error: beep boop'
 

gnovm/cmd/gno/testdata/gno_test/minim1.txtar

@@ -3,7 +3,7 @@
 gno test .
 
 ! stdout .+ 
-stderr '\?       \./\. 	\[no test files\]'
+stderr '\?       \. 	\[no test files\]'
 
 -- minim.gno --
 package minim

gnovm/cmd/gno/testdata/gno_test/minim2.txtar

@@ -3,7 +3,7 @@
 gno test .
 
 ! stdout .+ 
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 -- minim.gno --
 package minim

gnovm/cmd/gno/testdata/gno_test/minim3.txtar

@@ -3,7 +3,7 @@
 gno test .
 
 ! stdout .+ 
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 -- minim.gno --
 package minim

gnovm/cmd/gno/testdata/gno_test/output_correct.txtar

@@ -5,7 +5,7 @@ gno test -verbose .
 ! stdout .+ # stdout should be empty
 stderr '=== RUN   file/x_filetest.gno'
 stderr '--- PASS: file/x_filetest.gno \(\d\.\d\ds\)'
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 -- x_filetest.gno --
 package main

gnovm/cmd/gno/testdata/gno_test/output_sync.txtar

@@ -5,7 +5,7 @@ gno test -verbose . -update-golden-tests
 ! stdout .+ # stdout should be empty
 stderr '=== RUN   file/x_filetest.gno'
 stderr '--- PASS: file/x_filetest.gno \(\d\.\d\ds\)'
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 cmp x_filetest.gno x_filetest.gno.golden
 

gnovm/cmd/gno/testdata/gno_test/realm_correct.txtar

@@ -5,7 +5,7 @@ gno test -verbose .
 ! stdout .+ # stdout should be empty
 stderr '=== RUN   file/x_filetest.gno'
 stderr '--- PASS: file/x_filetest.gno \(\d\.\d\ds\)'
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 -- x_filetest.gno --
 // PKGPATH: gno.land/r/x

gnovm/cmd/gno/testdata/gno_test/realm_sync.txtar

@@ -5,7 +5,7 @@ gno test -verbose . -update-golden-tests
 ! stdout .+ # stdout should be empty
 stderr '=== RUN   file/x_filetest.gno'
 stderr '--- PASS: file/x_filetest.gno \(\d\.\d\ds\)'
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 cmp x_filetest.gno x_filetest.gno.golden
 

gnovm/cmd/gno/testdata/gno_test/valid_filetest.txtar

@@ -3,14 +3,14 @@
 gno test .
 
 ! stdout .+ 
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 gno test -verbose .
 
 ! stdout .+ 
 stderr '=== RUN   file/valid_filetest.gno'
 stderr '--- PASS: file/valid_filetest.gno \(\d\.\d\ds\)'
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
 
 -- valid.gno --
 package valid

gnovm/cmd/gno/testdata/gno_test/valid_test.txtar

@@ -3,7 +3,12 @@
 gno test .
 
 ! stdout .+ 
-stderr 'ok      \./\. 	\d\.\d\ds'
+stderr 'ok      \. 	\d\.\d\ds'
+
+gno test ./...
+
+! stdout .+ 
+stderr 'ok      \. 	\d\.\d\ds'
 
 -- valid.gno --
 package valid

gnovm/cmd/gno/util.go

@@ -9,6 +9,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"regexp"
 	"strings"
 	"time"
 
@@ -105,6 +106,89 @@ func gnoPackagesFromArgs(args []string) ([]string, error) {
 	return paths, nil
 }
 
+// targetsFromPatterns returns a list of target paths that match the patterns.
+// Each pattern can represent a file or a directory, and if the pattern
+// includes "/...", the "..." is treated as a wildcard, matching any string.
+// Intended to be used by gno commands such as `gno test`.
+func targetsFromPatterns(patterns []string) ([]string, error) {
+	paths := []string{}
+	for _, p := range patterns {
+		var match func(string) bool
+		patternLookup := false
+		dirToSearch := p
+
+		// Check if the pattern includes `/...`
+		if strings.Contains(p, "/...") {
+			index := strings.Index(p, "/...")
+			if index != -1 {
+				dirToSearch = p[:index] // Extract the directory path to search
+			}
+			match = matchPattern(strings.TrimPrefix(p, "./"))
+			patternLookup = true
+		}
+
+		info, err := os.Stat(dirToSearch)
+		if err != nil {
+			return nil, fmt.Errorf("invalid file or package path: %w", err)
+		}
+
+		// If the pattern is a file or a directory
+		// without `/...`, add it to the list.
+		if !info.IsDir() || !patternLookup {
+			paths = append(paths, p)
+			continue
+		}
+
+		// the pattern is a dir containing `/...`, walk the dir recursively and
+		// look for directories containing at least one .gno file and match pattern.
+		visited := map[string]bool{} // used to run the builder only once per folder.
+		err = filepath.WalkDir(dirToSearch, func(curpath string, f fs.DirEntry, err error) error {
+			if err != nil {
+				return fmt.Errorf("%s: walk dir: %w", dirToSearch, err)
+			}
+			// Skip directories and non ".gno" files.
+			if f.IsDir() || !isGnoFile(f) {
+				return nil
+			}
+
+			parentDir := filepath.Dir(curpath)
+			if _, found := visited[parentDir]; found {
+				return nil
+			}
+
+			visited[parentDir] = true
+			if match(parentDir) {
+				paths = append(paths, parentDir)
+			}
+
+			return nil
+		})
+		if err != nil {
+			return nil, err
+		}
+	}
+	return paths, nil
+}
+
+// matchPattern(pattern)(name) reports whether
+// name matches pattern.  Pattern is a limited glob
+// pattern in which '...' means 'any string' and there
+// is no other special syntax.
+// Simplified version of go source's matchPatternInternal
+// (see $GOROOT/src/cmd/internal/pkgpattern)
+func matchPattern(pattern string) func(name string) bool {
+	re := regexp.QuoteMeta(pattern)
+	re = strings.Replace(re, `\.\.\.`, `.*`, -1)
+	// Special case: foo/... matches foo too.
+	if strings.HasSuffix(re, `/.*`) {
+		re = re[:len(re)-len(`/.*`)] + `(/.*)?`
+	}
+	reg := regexp.MustCompile(`^` + re + `$`)
+	return func(name string) bool {
+		return reg.MatchString(name)
+	}
+}
+
 func fmtDuration(d time.Duration) string {
 	return fmt.Sprintf("%.2fs", d.Seconds())
 }