package version

import (
	"encoding/json"
	"encoding/xml"
	"testing"
)

func TestVersionBasic(t *testing.T) {
	testVersion := Version{}
	if testVersion.String() != "0" {
		t.FailNow()
	}
	testVersion.Major = 1
	if testVersion.String() != "1" {
		t.FailNow()
	}
	testVersion.Minor = 2
	if testVersion.String() != "1.2" {
		t.FailNow()
	}
	testVersion.Revision = 3
	if testVersion.String() != "1.2.3" {
		t.FailNow()
	}
	testVersion.Build = 4
	if testVersion.String() != "1.2.3.4" {
		t.FailNow()
	}
	if testVersion.SpecificString(1) != "1" {
		t.FailNow()
	}
	if testVersion.SpecificString(2) != "1.2" {
		t.FailNow()
	}
	if testVersion.SpecificString(3) != "1.2.3" {
		t.FailNow()
	}
	if testVersion.SpecificString(4) != "1.2.3.4" {
		t.FailNow()
	}
	testVersion.Major = 0
	if testVersion.String() != "0.2.3.4" {
		t.FailNow()
	}
}

func TestVersionComparisons(t *testing.T) {
	versions := make([]Version, 4)
	versions[0] = Version{Major: 1}
	versions[1] = Version{Major: 1, Minor: 2}
	versions[2] = Version{Major: 1, Minor: 2, Revision: 3}
	versions[3] = Version{Major: 1, Minor: 2, Revision: 3, Build: 4}
	for i := 0; i < 4; i++ {
		for j := 0; j < 4; j++ {
			if i != j {
				if versions[i].Equal(versions[j]) {
					t.FailNow()
				}
				if i < j {
					if !versions[i].Smaller(versions[j]) {
						t.FailNow()
					}
					if versions[i].Larger(versions[j]) {
						t.FailNow()
					}
				} else {
					if versions[i].Smaller(versions[j]) {
						t.FailNow()
					}
					if !versions[i].Larger(versions[j]) {
						t.FailNow()
					}
				}
			} else {
				if !versions[i].Equal(versions[j]) {
					t.FailNow()
				}
				if versions[i].Smaller(versions[j]) {
					t.FailNow()
				}
				if versions[i].Larger(versions[j]) {
					t.FailNow()
				}
			}
		}
	}
	if !versions[0].Smaller(Version{Major: 2}) {
		t.FailNow()
	}
}

func TestVersionParsing(t *testing.T) {
	version, err := ParseVersion("")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "0" {
		t.FailNow()
	}
	version, err = ParseVersion("a")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "0" {
		t.FailNow()
	}
	version, err = ParseVersion("1")
	if nil != err {
		t.FailNow()
	}
	if version.String() != "1" {
		t.FailNow()
	}
	version, err = ParseVersion("1.")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "1" {
		t.FailNow()
	}
	version, err = ParseVersion("1.a")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "1" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2")
	if nil != err {
		t.FailNow()
	}
	if version.String() != "1.2" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "1.2" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.a")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "1.2" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.3")
	if nil != err {
		t.FailNow()
	}
	if version.String() != "1.2.3" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.3.")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "1.2.3" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.3.a")
	if nil == err {
		t.FailNow()
	}
	if version.String() != "1.2.3" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.3.4")
	if nil != err {
		t.FailNow()
	}
	if version.String() != "1.2.3.4" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.3.4.")
	if nil != err {
		t.FailNow()
	}
	if version.String() != "1.2.3.4" {
		t.FailNow()
	}
	version, err = ParseVersion("1.2.3.4.a")
	if nil != err {
		t.FailNow()
	}
	if version.String() != "1.2.3.4" {
		t.FailNow()
	}

	var finalTest *Version
	if finalTest.Parse("1.2.3.4") == nil {
		t.FailNow()
	}
}

func TestVersionXML(t *testing.T) {
	versions := make([]Version, 7)
	versions[0] = Version{Major: 1}
	versions[1] = Version{Major: 1, Minor: 2}
	versions[2] = Version{Major: 1, Minor: 2, Revision: 3}
	versions[3] = Version{Major: 1, Minor: 2, Revision: 3, Build: 4}
	versions[4] = Version{Major: 0, Minor: 2, Revision: 3, Build: 4}
	versions[5] = Version{Major: 0, Minor: 0, Revision: 3, Build: 4}
	versions[6] = Version{Major: 0, Minor: 0, Revision: 0, Build: 4}
	var testVersion Version
	var err error
	for i := 0; i < 7; i++ {
		binary, err := xml.Marshal(versions[i])
		if nil != err {
			t.FailNow()
		}
		err = xml.Unmarshal(binary, &testVersion)
		if nil != err {
			t.FailNow()
		}
		if !testVersion.Equal(versions[i]) {
			t.FailNow()
		}
	}
	err = xml.Unmarshal([]byte("<Version Major=\"4\" Minor=\"3\" Revision=\"2\" Build=\"1\"/>"), &testVersion)
	if nil != err {
		t.FailNow()
	}
	if !testVersion.Equal(Version{Major: 4, Minor: 3, Revision: 2, Build: 1}) {
		t.FailNow()
	}
	err = xml.Unmarshal([]byte("<Version Major=\"a\" Minor=\"3\" Revision=\"2\" Build=\"1\"/>"), &testVersion)
	if nil == err {
		t.FailNow()
	}
	err = xml.Unmarshal([]byte("<Version Major=\"4\" Minor=\"b\" Revision=\"2\" Build=\"1\"/>"), &testVersion)
	if nil == err {
		t.FailNow()
	}
	err = xml.Unmarshal([]byte("<Version Major=\"4\" Minor=\"3\" Revision=\"c\" Build=\"1\"/>"), &testVersion)
	if nil == err {
		t.FailNow()
	}
	err = xml.Unmarshal([]byte("<Version Major=\"4\" Minor=\"3\" Revision=\"2\" Build=\"d\"/>"), &testVersion)
	if nil == err {
		t.FailNow()
	}
	err = xml.Unmarshal([]byte("<Version Major=\"4\" Minor=\"3\" Revision=\"2\" Build=\"1\"></Versions>"), &testVersion)
	if nil == err {
		t.FailNow()
	}
	err = xml.Unmarshal([]byte("<Version Major=\"4\" Minor=\"3\" Revision=\"2\" Build=\"1\"><Dummy/></Version>"), &testVersion)
	if nil == err {
		t.FailNow()
	}
	err = xml.Unmarshal([]byte(""), &testVersion)
	if nil == err {
		t.FailNow()
	}
}

func TestVersionJSON(t *testing.T) {
	versions := make([]Version, 7)
	versions[0] = Version{Major: 1}
	versions[1] = Version{Major: 1, Minor: 2}
	versions[2] = Version{Major: 1, Minor: 2, Revision: 3}
	versions[3] = Version{Major: 1, Minor: 2, Revision: 3, Build: 4}
	versions[4] = Version{Major: 0, Minor: 2, Revision: 3, Build: 4}
	versions[5] = Version{Major: 0, Minor: 0, Revision: 3, Build: 4}
	versions[6] = Version{Major: 0, Minor: 0, Revision: 0, Build: 4}
	var testVersion Version
	var err error
	for i := 0; i < 7; i++ {
		binary, err := json.Marshal(versions[i])
		if nil != err {
			t.FailNow()
		}
		err = json.Unmarshal(binary, &testVersion)
		if nil != err {
			t.FailNow()
		}
		if !testVersion.Equal(versions[i]) {
			t.FailNow()
		}
	}
	err = json.Unmarshal([]byte("\"binary\""), &testVersion)
	if nil == err {
		t.FailNow()
	}
}