test(gnovm): in eval_test, test all files in gnovm/tests subdirs (#2754)

Changes the EvalFiles tests to support sub-directories in `gnovm/tests`,
skipping the `extern` directory as it is used for imports.

Other changes mostly concern not having tests where some output lines
terminate with spaces:

- Changed FuncValue.String, so that in case of a closure value the
signature is printed, as shown in the `assign_unnamed_type` tests.
- Require all directives to be on a new line (mostly for consistency
with 99% of the testing corpus)
- use commas in some places instead of spaces; use `;` for end of line
on `Println` statements when they're supposed to print an empty string.
- remove the leading space in the `what the firetruck?` tests.

<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
- [x] 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>

gnovm/pkg/gnolang/debugger_test.go

@@ -40,7 +40,7 @@ func evalTest(debugAddr, in, file string) (out, err, stacktrace string) {
 		if r := recover(); r != nil {
 			err = fmt.Sprintf("%v", r)
 		}
-		out = strings.TrimSpace(out)
+		out = strings.TrimSuffix(out, "\n")
 		err = strings.TrimSpace(strings.ReplaceAll(err, "../../tests/files/", "files/"))
 	}()
 

gnovm/pkg/gnolang/eval_test.go

@@ -1,26 +1,35 @@
 package gnolang_test
 
 import (
+	"io/fs"
 	"os"
-	"path"
+	"path/filepath"
+	"regexp"
 	"sort"
 	"strings"
 	"testing"
 )
 
 func TestEvalFiles(t *testing.T) {
 	dir := "../../tests/files"
-	files, err := os.ReadDir(dir)
-	if err != nil {
-		t.Fatal(err)
-	}
-	for _, f := range files {
-		wantOut, wantErr, wantStacktrace, ok := testData(dir, f)
+	err := fs.WalkDir(os.DirFS(dir), ".", func(path string, de fs.DirEntry, err error) error {
+		switch {
+		case err != nil:
+			return err
+		case path == "extern":
+			return fs.SkipDir
+		case de.IsDir():
+			return nil
+		}
+
+		fullPath := filepath.Join(dir, path)
+		wantOut, wantErr, wantStacktrace, ok := testData(fullPath)
 		if !ok {
-			continue
+			return nil
 		}
-		t.Run(f.Name(), func(t *testing.T) {
-			out, err, stacktrace := evalTest("", "", path.Join(dir, f.Name()))
+
+		t.Run(path, func(t *testing.T) {
+			out, err, stacktrace := evalTest("", "", fullPath)
 
 			if wantErr != "" && !strings.Contains(err, wantErr) ||
 				wantErr == "" && err != "" {
@@ -34,15 +43,16 @@ func TestEvalFiles(t *testing.T) {
 				t.Fatalf("unexpected output\nWant: %s\n Got: %s", wantOut, out)
 			}
 		})
+
+		return nil
+	})
+	if err != nil {
+		t.Fatal(err)
 	}
 }
 
 // testData returns the expected output and error string, and true if entry is valid.
-func testData(dir string, f os.DirEntry) (testOut, testErr, testStacktrace string, ok bool) {
-	if f.IsDir() {
-		return
-	}
-	name := path.Join(dir, f.Name())
+func testData(name string) (testOut, testErr, testStacktrace string, ok bool) {
 	if !strings.HasSuffix(name, ".gno") || strings.HasSuffix(name, "_long.gno") {
 		return
 	}
@@ -54,8 +64,11 @@ func testData(dir string, f os.DirEntry) (testOut, testErr, testStacktrace strin
 	if strings.Contains(str, "// PKGPATH:") {
 		return
 	}
-
-	res := commentFrom(str, []string{"\n// Output:", "\n// Error:", "\n// Stacktrace:"})
+	res := commentFrom(str, []string{
+		"// Output:",
+		"// Error:",
+		"// Stacktrace:",
+	})
 
 	return res[0], res[1], res[2], true
 }
@@ -66,12 +79,17 @@ type directive struct {
 	index int
 }
 
+// (?m) makes ^ and $ match start/end of string
+var reCommentPrefix = regexp.MustCompile("(?m)^//(?: |$)")
+
 // commentFrom returns the comments from s that are between the delimiters.
 func commentFrom(s string, delims []string) []string {
 	directives := make([]directive, len(delims))
 	directivesFound := make([]*directive, 0, len(delims))
 
 	for i, delim := range delims {
+		// must find delim isolated on one line
+		delim = "\n" + delim + "\n"
 		index := strings.Index(s, delim)
 		directives[i] = directive{delim: delim, index: index}
 		if index >= 0 {
@@ -88,7 +106,10 @@ func commentFrom(s string, delims []string) []string {
 			next = directivesFound[i+1].index
 		}
 
-		directivesFound[i].res = strings.TrimSpace(strings.ReplaceAll(s[directivesFound[i].index+len(directivesFound[i].delim):next], "\n// ", "\n"))
+		parsed := reCommentPrefix.ReplaceAllLiteralString(
+			s[directivesFound[i].index+len(directivesFound[i].delim):next],
+			"")
+		directivesFound[i].res = strings.TrimSuffix(parsed, "\n")
 	}
 
 	res := make([]string, len(directives))

gnovm/pkg/gnolang/values_string.go

@@ -170,6 +170,9 @@ func (fv *FuncValue) String() string {
 	if fv.Type == nil {
 		return fmt.Sprintf("incomplete-func ?%s(?)?", name)
 	}
+	if name == "" {
+		return fmt.Sprintf("%s{...}", fv.Type.String())
+	}
 	return name
 }
 

gnovm/tests/files/a31.gno

@@ -2,10 +2,10 @@ package main
 
 func main() {
 	for range []int{0, 1, 2} {
-		print("hello ")
+		print("hello,")
 	}
 	println("")
 }
 
 // Output:
-// hello hello hello
+// hello,hello,hello,

gnovm/tests/files/assign_unnamed_type/unnamedtype5_filetest.gno

@@ -34,8 +34,8 @@ func main() {
 
 // Output:
 // 1 (inc main.op)
-// 0
+// 0 func(n int)( int){...}
 // -1 dec
-// 0 ( main.op)
+// 0 (func(n int)( int){...} main.op)
 // -1 dec
 // 1 inc

gnovm/tests/files/assign_unnamed_type/unnamedtype5a_filetest.gno

@@ -27,6 +27,7 @@ func main() {
 }
 
 // Output:
+// func(n int)( int){...}
 // 1
-// ( main.op)
+// (func(n int)( int){...} main.op)
 // -1

gnovm/tests/files/convert4.gno

@@ -4,4 +4,5 @@ func main() {
 	println(int(nil))
 }
 
-// Error: cannot convert (undefined) to int
+// Error:
+// main/files/convert4.gno:4:10: cannot convert (undefined) to int

gnovm/tests/files/convert5.gno

@@ -6,4 +6,5 @@ func main() {
 	println(ints)
 }
 
-// Error: cannot convert (undefined) to int
+// Error:
+// main/files/convert5.gno:3:1: cannot convert (undefined) to int

gnovm/tests/files/defer6.gno

@@ -1,21 +1,21 @@
 package main
 
 func f1() {
-	defer print("f1-begin ")
+	defer print("f1-begin,")
 	f2()
-	defer print("f1-end ")
+	defer print("f1-end,")
 }
 
 func f2() {
-	defer print("f2-begin ")
+	defer print("f2-begin,")
 	f3()
-	defer print("f2-end ")
+	defer print("f2-end,")
 }
 
 func f3() {
-	defer print("f3-begin ")
-	print("hello ")
-	defer print("f3-end ")
+	defer print("f3-begin,")
+	print("hello,")
+	defer print("f3-end,")
 }
 
 func main() {
@@ -24,4 +24,4 @@ func main() {
 }
 
 // Output:
-// hello f3-end f3-begin f2-end f2-begin f1-end f1-begin
+// hello,f3-end,f3-begin,f2-end,f2-begin,f1-end,f1-begin,

gnovm/tests/files/map15.gno

@@ -6,8 +6,8 @@ func main() {
 	users := make(map[string]string)
 
 	v := users["a"]
-	fmt.Println("v:", v)
+	fmt.Println("v:", v, ";")
 }
 
 // Output:
-// v:
+// v:  ;

gnovm/tests/files/method27.gno

@@ -13,8 +13,8 @@ type AuthenticatedRequest struct {
 
 func main() {
 	a := &AuthenticatedRequest{}
-	fmt.Println("ua:", a.UserAgent())
+	fmt.Println("ua:", a.UserAgent(), ";")
 }
 
 // Output:
-// ua:
+// ua:  ;

gnovm/tests/files/types/cmp_iface_2.gno

@@ -19,7 +19,7 @@ func (e Error) Error() string {
 func main() {
 	var e0 E
 	e0 = Error(0)
-	fmt.Printf("%T \n", e0)
+	fmt.Printf("%T\n", e0)
 	if e0 == Error(0) {
 		println("what the firetruck?")
 	} else {

gnovm/tests/files/types/eql_0f2d.gno

@@ -19,7 +19,7 @@ func (e Error) Error() string {
 func main() {
 	var e0 E
 	e0 = Error(0)
-	fmt.Printf("%T \n", e0)
+	fmt.Printf("%T\n", e0)
 	if e0 == Error(0) {
 		println("what the firetruck?")
 	} else {

gnovm/tests/files/types/eql_0f2e.gno

@@ -19,7 +19,7 @@ func (e Error) Error() string {
 func main() {
 	var e0 E
 	e0 = Error(0)
-	fmt.Printf("%T \n", e0)
+	fmt.Printf("%T\n", e0)
 	if Error(0) == e0 {
 		println("what the firetruck?")
 	} else {

gnovm/tests/files/types/runtime_a2.gno

@@ -8,7 +8,7 @@ func gen() interface{} {
 
 func main() {
 	r := gen()
-	fmt.Printf("%T \n", r)
+	fmt.Printf("%T\n", r)
 }
 
 // Output:

gnovm/tests/files/types/shift_a12.gno

@@ -6,7 +6,7 @@ func main() {
 	a := uint(1)
 	r := uint64(1) << a
 	println(r)
-	fmt.Printf("%T \n", r)
+	fmt.Printf("%T\n", r)
 }
 
 // Output:

gnovm/tests/files/types/shift_a13.gno

@@ -4,7 +4,7 @@ import "fmt"
 
 func main() {
 	var r uint64 = 1 << int8(1)
-	fmt.Printf("%T \n", r)
+	fmt.Printf("%T\n", r)
 	println(r)
 }