// Copyright (c) 2015 Arista Networks, Inc.
// Use of this source code is governed by the Apache License 2.0
// that can be found in the COPYING file.

package key

import (
	"math"
	"testing"
)

func TestStringify(t *testing.T) {
	testcases := []struct {
		name   string
		input  interface{}
		output string // or expected panic error message.
	}{{
		name:   "nil",
		input:  nil,
		output: "Unable to stringify nil",
	}, {
		name:   "struct{}",
		input:  struct{}{},
		output: "Unable to stringify type struct {}: struct {}{}",
	}, {
		name:   "string",
		input:  "foobar",
		output: "foobar",
	}, {
		name:   "non-ASCII string",
		input:  "日本語",
		output: `\u65e5\u672c\u8a9e`,
	}, {
		name:   "uint8",
		input:  uint8(43),
		output: "43",
	}, {
		name:   "uint16",
		input:  uint16(43),
		output: "43",
	}, {
		name:   "uint32",
		input:  uint32(43),
		output: "43",
	}, {
		name:   "uint64",
		input:  uint64(43),
		output: "43",
	}, {
		name:   "max uint64",
		input:  uint64(math.MaxUint64),
		output: "18446744073709551615",
	}, {
		name:   "int8",
		input:  int8(-32),
		output: "-32",
	}, {
		name:   "int16",
		input:  int16(-32),
		output: "-32",
	}, {
		name:   "int32",
		input:  int32(-32),
		output: "-32",
	}, {
		name:   "int64",
		input:  int64(-32),
		output: "-32",
	}, {
		name:   "true",
		input:  true,
		output: "true",
	}, {
		name:   "false",
		input:  false,
		output: "false",
	}, {
		name:   "float32",
		input:  float32(2.345),
		output: "f1075188859",
	}, {
		name:   "float64",
		input:  float64(-34.6543),
		output: "f-4593298060402564373",
	}, {
		name: "map[string]interface{}",
		input: map[string]interface{}{
			"b": uint32(43),
			"a": "foobar",
			"ex": map[string]interface{}{
				"d": "barfoo",
				"c": uint32(45),
			},
		},
		output: "foobar_43_45_barfoo",
	}, {
		name: "map[Key]interface{}",
		input: map[Key]interface{}{
			New(uint32(42)): true,
			New("foo"):      "bar",
			New(map[string]interface{}{"hello": "world"}): "yolo",
		},
		output: "42=true_foo=bar_world=yolo",
	}, {
		name: "nil inside map[string]interface{}",
		input: map[string]interface{}{
			"n": nil,
		},
		output: "Unable to stringify nil",
	}}

	for _, tcase := range testcases {
		// Pardon the contraption used to catch panic's in error cases.
		func() {
			defer func() {
				if e := recover(); e != nil {
					if tcase.output != e.(error).Error() {
						t.Errorf("Test %s: Error returned: %q but wanted %q",
							tcase.name, e, tcase.output)
					}
				}
			}()

			result := stringify(tcase.input)
			if tcase.output != result {
				t.Errorf("Test %s: Result is different\nReceived: %s\nExpected: %s",
					tcase.name, result, tcase.output)
			}
		}()
	}
}