Fix auto extension resolution breaking tests on windows

internal/cmd/launcher.go

@@ -39,7 +39,18 @@ func newIOFSBridge(fs fsext.Fs, pwd string) fs.FS {
 
 // Open implements fs.Fs Open
 func (b *ioFSBridge) Open(name string) (fs.File, error) {
-	f, err := b.fsext.Open(path.Join(b.pwd, name))
+	_ = fsext.Walk(b.fsext, "/", func(path string, _ fs.FileInfo, _ error) error {
+		fmt.Println("walk: ", path)
+		return nil
+	})
+	fmt.Println("ioFSBridge.Open", name)
+	name = filepath.ToSlash(filepath.Clean(fsext.FilePathSeparator + name))
+	fmt.Println("ioFSBridge.Open post clean up", name)
+	if !path.IsAbs(name) {
+		name = path.Join(b.pwd, name)
+	}
+	fmt.Println("ioFSBridge.Open post isAbs", name)
+	f, err := b.fsext.Open(name)
 	if err != nil {
 		return nil, fmt.Errorf("opening file via launcher's bridge: %w", err)
 	}
@@ -324,7 +335,7 @@ func analyze(gs *state.GlobalState, args []string) (k6deps.Dependencies, error)
 		}
 		dopts.Script.Name = sourceRootPath
 		dopts.Script.Contents = src.Data
-		dopts.Fs = newIOFSBridge(gs.FS, pwd)
+		dopts.Fs = newIOFSBridge(gs.FS, filepath.ToSlash(pwd))
 	}
 
 	return k6deps.Analyze(dopts)

internal/cmd/tests/cmd_run_test.go

@@ -1032,6 +1032,61 @@ func TestAbortedByScriptSetupErrorWithDependency(t *testing.T) {
 	assert.Contains(t, stdout, "bogus summary")
 }
 
+func TestRunFromNotBaseDirectory(t *testing.T) {
+	t.Parallel()
+	depScript := `
+		export const p = 5;
+	`
+	mainScript := `
+		import { p } from "../../../b/dep.js";
+		export default function() {
+			console.log("p = " + p);
+		};
+	`
+
+	ts := NewGlobalTestState(t)
+	require.NoError(t, fsext.WriteFile(ts.FS, filepath.Join(ts.Cwd, "a/b/c/test.js"), []byte(mainScript), 0o644))
+	require.NoError(t, fsext.WriteFile(ts.FS, filepath.Join(ts.Cwd, "b/dep.js"), []byte(depScript), 0o644))
+
+	ts.Cwd = filepath.Join(ts.Cwd, "./a/")
+	ts.CmdArgs = []string{"k6", "run", "-v", "--log-output=stdout", "b/c/test.js"}
+
+	cmd.ExecuteWithGlobalState(ts.GlobalState)
+
+	stdout := ts.Stdout.String()
+	t.Log(stdout)
+	require.Contains(t, stdout, `p = 5`)
+}
+
+func TestRunFromSeparateDriveWindows(t *testing.T) {
+	t.Parallel()
+	if runtime.GOOS != "windows" {
+		t.Skip("test only for windows")
+	}
+	depScript := `
+		export const p = 5;
+	`
+	mainScript := `
+		import { p } from "../../../b/dep.js";
+		export default function() {
+			console.log("p = " + p);
+		};
+	`
+
+	ts := NewGlobalTestState(t)
+	require.NoError(t, fsext.WriteFile(ts.FS, filepath.Join(ts.Cwd, "a/b/c/test.js"), []byte(mainScript), 0o644))
+	require.NoError(t, fsext.WriteFile(ts.FS, filepath.Join(ts.Cwd, "b/dep.js"), []byte(depScript), 0o644))
+
+	ts.Cwd = "f:\\something somewhere\\and another\\"
+	ts.CmdArgs = []string{"k6", "run", "-v", "--log-output=stdout", "c:\\test\\a\\b\\c\\test.js"}
+
+	cmd.ExecuteWithGlobalState(ts.GlobalState)
+
+	stdout := ts.Stdout.String()
+	t.Log(stdout)
+	require.Contains(t, stdout, `p = 5`)
+}
+
 func runTestWithNoLinger(_ *testing.T, ts *GlobalTestState) {
 	cmd.ExecuteWithGlobalState(ts.GlobalState)
 }