feat: record path handlingt to strip testDir prefix

internal/miro/record.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 )
 
 // Record creates the requested directory path under the resolved test directory.
@@ -13,10 +14,44 @@ func Record(path string) (string, error) {
 		return "", fmt.Errorf("failed to resolve test directory: %v", err)
 	}
 
-	target := filepath.Join(testDir, path)
+	target, err := resolveRecordTarget(testDir, path)
+	if err != nil {
+		return "", err
+	}
+
 	if err := os.MkdirAll(target, 0o755); err != nil {
 		return "", err
 	}
 
 	return target, nil
 }
+
+func resolveRecordTarget(testDir, path string) (string, error) {
+	absTestDir, err := filepath.Abs(testDir)
+	if err != nil {
+		return "", fmt.Errorf("failed to resolve test directory path: %v", err)
+	}
+
+	absPath, err := filepath.Abs(path)
+	if err != nil {
+		return "", fmt.Errorf("failed to resolve record path: %v", err)
+	}
+
+	// path rel to testDir
+	relToTestDir, err := filepath.Rel(absTestDir, absPath)
+	if err == nil && isWithinBase(relToTestDir) {
+		return filepath.Join(absTestDir, relToTestDir), nil
+	}
+
+	// not rel to test dir and absolute path given
+	if filepath.IsAbs(path) {
+		return "", fmt.Errorf("record path %q must be inside test directory %q", path, absTestDir)
+	}
+
+	return filepath.Join(absTestDir, path), nil
+}
+
+// is the rel path going "outside"
+func isWithinBase(rel string) bool {
+	return rel == "." || (rel != ".." && !strings.HasPrefix(rel, ".."+string(os.PathSeparator)))
+}

internal/miro/record_test.go

@@ -0,0 +1,75 @@
+package miro
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestRecordCreatesRelativePath(t *testing.T) {
+	root := t.TempDir()
+	testDir := filepath.Join(root, "e2e")
+	mustMkdirAll(t, testDir)
+
+	got := withWorkingDir(t, root, func() string {
+		path, err := Record(filepath.Join("a", "b", "c") + string(os.PathSeparator))
+		if err != nil {
+			t.Fatalf("Record() error = %v", err)
+		}
+		return path
+	})
+
+	want := filepath.Join(testDir, "a", "b", "c")
+	if got != want {
+		t.Fatalf("Record() = %q, want %q", got, want)
+	}
+
+	info, err := os.Stat(want)
+	if err != nil {
+		t.Fatalf("Stat() error = %v", err)
+	}
+	if !info.IsDir() {
+		t.Fatalf("created path %q is not a directory", want)
+	}
+}
+
+func TestRecordStripsExplicitTestDirPrefix(t *testing.T) {
+	root := t.TempDir()
+	testDir := filepath.Join(root, "e2e")
+	mustMkdirAll(t, testDir)
+
+	got := withWorkingDir(t, root, func() string {
+		path, err := Record(filepath.Join("e2e", "a", "b", "c"))
+		if err != nil {
+			t.Fatalf("Record() error = %v", err)
+		}
+		return path
+	})
+
+	want := filepath.Join(testDir, "a", "b", "c")
+	if got != want {
+		t.Fatalf("Record() = %q, want %q", got, want)
+	}
+
+	if _, err := os.Stat(want); err != nil {
+		t.Fatalf("Stat() error = %v", err)
+	}
+}
+
+func TestRecordRejectsAbsolutePathOutsideTestDir(t *testing.T) {
+	root := t.TempDir()
+	mustMkdirAll(t, filepath.Join(root, "e2e"))
+	outside := filepath.Join(root, "outside", "a", "b", "c")
+
+	err := withWorkingDir(t, root, func() error {
+		_, err := Record(outside)
+		return err
+	})
+
+	if err == nil {
+		t.Fatal("Record() error = nil, want error")
+	}
+	if _, statErr := os.Stat(outside); !os.IsNotExist(statErr) {
+		t.Fatalf("Stat(%q) error = %v, want not exists", outside, statErr)
+	}
+}