package cleanpath_test

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"

	"github.com/palantir/stacktrace/cleanpath"
)

func TestRemoveGoPath(t *testing.T) {
	for _, testcase := range []struct {
		gopath   []string
		path     string
		expected string
	}{
		{
			// empty gopath
			gopath:   []string{},
			path:     "/some/dir/src/pkg/prog.go",
			expected: "/some/dir/src/pkg/prog.go",
		},
		{
			// single matching dir in gopath
			gopath:   []string{"/some/dir"},
			path:     "/some/dir/src/pkg/prog.go",
			expected: "pkg/prog.go",
		},
		{
			// nonmatching dir in gopath
			gopath:   []string{"/other/dir"},
			path:     "/some/dir/src/pkg/prog.go",
			expected: "/some/dir/src/pkg/prog.go",
		},
		{
			// multiple matching dirs in gopath, shorter first
			gopath:   []string{"/some", "/some/src/dir"},
			path:     "/some/src/dir/src/pkg/prog.go",
			expected: "pkg/prog.go",
		},
		{
			// multiple matching dirs in gopath, longer first
			gopath:   []string{"/some/src/dir", "/some"},
			path:     "/some/src/dir/src/pkg/prog.go",
			expected: "pkg/prog.go",
		},
	} {
		gopath := strings.Join(testcase.gopath, string(filepath.ListSeparator))
		err := os.Setenv("GOPATH", gopath)
		assert.NoError(t, err, "error setting gopath")

		cleaned := cleanpath.RemoveGoPath(testcase.path)
		assert.Equal(t, testcase.expected, cleaned, "testcase: %+v", testcase)
	}
}