Add Path

go.mod

@@ -1,3 +1,11 @@
 module github.com/kerelape/filesystem
 
 go 1.20
+
+require github.com/stretchr/testify v1.8.4
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,9 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

path.go

@@ -0,0 +1,23 @@
+package filesystem
+
+import "path"
+
+// Path is a path to a file-system object.
+type Path string
+
+// IsAbsolute returns true if the path is absolute.
+func (p Path) IsAbsolute() bool {
+	return path.IsAbs((string)(p))
+}
+
+// IsRelative is oppasite to IsAbsolute, it returns
+// true if the path is relative, and false if it's
+// absolute.
+func (p Path) IsRelative() bool {
+	return !p.IsAbsolute()
+}
+
+// String returns this path as a string.
+func (p Path) String() string {
+	return (string)(p)
+}

path_test.go

@@ -0,0 +1,39 @@
+package filesystem
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPath_IsAbsolute(t *testing.T) {
+	absolutes := []Path{
+		"/",
+		"/smth",
+		"/smth/",
+	}
+	for _, absolute := range absolutes {
+		t.Run(absolute.String(), func(t *testing.T) {
+			assert.Truef(t, absolute.IsAbsolute(), `"%s" was expected to be absolute`, absolute)
+			assert.Falsef(t, absolute.IsRelative(), `"%s" is both, relative and absolute`, absolute)
+		})
+	}
+}
+
+func TestPath_IsRelative(t *testing.T) {
+	relatives := []Path{
+		"smth",
+		"./smth",
+		"../smth/",
+	}
+	for _, relative := range relatives {
+		t.Run(relative.String(), func(t *testing.T) {
+			assert.Truef(t, relative.IsRelative(), `"%s" was expected to be relative`, relative)
+			assert.Falsef(t, relative.IsAbsolute(), `"%s" is both, relative and absolute`, relative)
+		})
+	}
+}
+
+func TestPath_String(t *testing.T) {
+	assert.Equal(t, (Path)("/").String(), "/")
+}