versioning/json_test.go

package versioning_test

import (
	"encoding/json"
	"testing"

	"github.com/stretchr/testify/require"

	"git.bit5.ru/backend/versioning"
)

type structWithVersion struct {
	Version versioning.Version `json:"v"`
}

func TestMarshalJSON(t *testing.T) {
	cases := []struct {
		version      structWithVersion
		expectedJson string
	}{
		{
			version:      structWithVersion{versioning.MustParseVersion("")},
			expectedJson: `{"v":"0.0.0"}`,
		},

		{
			version:      structWithVersion{versioning.MustParseVersion("10")},
			expectedJson: `{"v":"10.0.0"}`,
		},

		{
			version:      structWithVersion{versioning.MustParseVersion("11.2")},
			expectedJson: `{"v":"11.2.0"}`,
		},

		{
			version:      structWithVersion{versioning.MustParseVersion("11.2.33")},
			expectedJson: `{"v":"11.2.33"}`,
		},
	}

	for i, c := range cases {
		caseNum := i + 1

		actualJson, err := json.Marshal(c.version)
		require.NoError(t, err, "case #%d", caseNum)
		require.EqualValues(t, []byte(c.expectedJson), actualJson, "case #%d", caseNum)
	}
}

func TestUnmarshalJSON(t *testing.T) {
	cases := []struct {
		versionJson string
		expectedVal structWithVersion
	}{
		{
			versionJson: `{"v":"0.0.0"}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("")},
		},

		{
			versionJson: `{"v":"0.0.1"}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("0.0.1")},
		},

		{
			versionJson: `{"v":"0.1"}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("0.1.0")},
		},

		{
			versionJson: `{"v":"1"}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("1.0.0")},
		},

		{
			versionJson: `{"v":0}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("0.0.0")},
		},

		{
			versionJson: `{"v":99}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("0.0.99")},
		},

		{
			versionJson: `{"v":88899}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("0.888.99")},
		},

		{
			versionJson: `{"v":7788899}`,
			expectedVal: structWithVersion{versioning.MustParseVersion("77.888.99")},
		},
	}

	for i, c := range cases {
		caseNum := i + 1

		var actualVal structWithVersion
		err := json.Unmarshal([]byte(c.versionJson), &actualVal)
		require.NoError(t, err, "case #%d", caseNum)
		require.EqualValues(t, c.expectedVal, actualVal, "case #%d", caseNum)
	}
}