muonsoft / validation

import (

	"fmt"

	"reflect"

	"testing"

	"github.com/stretchr/testify/assert"

)

func TestNewIterable_WhenNotIterable_ExpectNotIterableError(t *testing.T) {

	iterable, err := NewIterable(0)

	assert.Nil(t, iterable)

	assert.EqualError(t, err, "value of type int is not iterable")

}

func TestNewIterable_WhenNilSlice_ExpectIsNil(t *testing.T) {

	var slice []string

	iterable, err := NewIterable(slice)

	if assert.NoError(t, err) {

		assert.True(t, iterable.IsNil())

	}

}

func TestNewIterable_WhenNilMap_ExpectIsNil(t *testing.T) {

	var value map[string]string

	iterable, err := NewIterable(value)

	if assert.NoError(t, err) {

		assert.True(t, iterable.IsNil())

	}

}

}

func TestNewIterable_WhenMapElementImplementsInterface_ExpectTrue(t *testing.T) {

	var value map[string]testInterface

	interfaceType := reflect.TypeOf((*testInterface)(nil)).Elem()

	iterable, err := NewIterable(value)

	if assert.NoError(t, err) {

		implements := iterable.IsElementImplements(interfaceType)

		assert.True(t, implements)

	}

}

func TestIterableArray_Iterate_WhenBreakAtFirstElement_ExpectCountIsOne(t *testing.T) {

	count := 0

	iterable, err := NewIterable([]string{"a", "b", "c"})

	if err != nil {

		t.Fatal("failed to initialize iterable from slice")

	}

	err = iterable.Iterate(func(key Key, value interface{}) error {

		count++

		return fmt.Errorf("error")

	})

	assert.EqualError(t, err, "error")

	assert.Equal(t, 1, count)

}

func TestIterableMap_Iterate_WhenBreakAtFirstElement_ExpectCountIsOne(t *testing.T) {

	count := 0

	iterable, err := NewIterable(map[string]string{"a": "a", "b": "b", "c": "c"})

	if err != nil {

		t.Fatal("failed to initialize iterable from map")

	}

	err = iterable.Iterate(func(key Key, value interface{}) error {

		count++

		return fmt.Errorf("error")

	})

	assert.EqualError(t, err, "error")

	assert.Equal(t, 1, count)

}

func TestNewIterable(t *testing.T) {

	tests := []struct {

		name            string

		value           interface{}

		expectedKey     string

		expectedIsIndex bool

		expectedIndex   int

		expectedValue   interface{}

	}{

		{

			name:            "array of strings",

			value:           [...]string{"value"},

			expectedKey:     "0",

			expectedIsIndex: true,

			expectedIndex:   0,

			expectedValue:   "value",

		},

		{

			name:            "array of string pointers",

			value:           [...]*string{stringPointer("value")},

			expectedKey:     "0",

			expectedIsIndex: true,

			expectedIndex:   0,

			expectedValue:   "value",

		},

		{

			name:            "array of string pointers with nil",

			value:           [...]*string{nil},

			expectedKey:     "0",

			expectedIsIndex: true,

			expectedIndex:   0,

			expectedValue:   nil,

		},

		{

			name:            "slice of strings",

			value:           []string{"value"},

			expectedKey:     "0",

			expectedIsIndex: true,

			expectedIndex:   0,

			expectedValue:   "value",

		},

		{

			name:            "slice of string pointers",

			value:           []*string{stringPointer("value")},

			expectedKey:     "0",

			expectedIsIndex: true,

			expectedIndex:   0,

			expectedValue:   "value",

		},

		{

			name:            "slice of string pointers with nil",

			value:           []*string{nil},

			expectedKey:     "0",

			expectedIsIndex: true,

			expectedIndex:   0,

			expectedValue:   nil,

		},

		{

			name:            "map of strings",

			value:           map[string]string{"key": "value"},

			expectedKey:     "key",

			expectedIsIndex: false,

			expectedIndex:   -1,

			expectedValue:   "value",

		},

		{

			name:            "map of string pointers",

			value:           map[string]*string{"key": stringPointer("value")},

			expectedKey:     "key",

			expectedIsIndex: false,

			expectedIndex:   -1,

			expectedValue:   "value",

		},

		{

			name:            "map of string pointers with nil",

			value:           map[string]*string{"key": nil},

			expectedKey:     "key",

			expectedIsIndex: false,

			expectedIndex:   -1,

			expectedValue:   nil,

		},

		{

			name:            "map of string pointers with pointer key",

			value:           map[*string]*string{stringPointer("key"): nil},

			expectedKey:     "key",

			expectedIsIndex: false,

			expectedIndex:   -1,

			expectedValue:   nil,

		},

		{

			name:            "map of string pointers with nil pointer key",

			value:           map[*string]*string{nil: nil},

			expectedKey:     "",

			expectedIsIndex: false,

			expectedIndex:   -1,

			expectedValue:   nil,

		},

		{

			name:            "map of string pointers with struct key",

			value:           map[mapKey]string{{Key: "key"}: "value"},

			expectedKey:     "<generic.mapKey Value>",

			expectedIsIndex: false,

			expectedIndex:   -1,

			expectedValue:   "value",

		},

	}

	for _, test := range tests {

		t.Run(test.name, func(t *testing.T) {

			iterable, err := NewIterable(test.value)

			if assert.NoError(t, err) {

				assert.Equal(t, 1, iterable.Count())

				assert.False(t, iterable.IsNil())

				i := 0

				err = iterable.Iterate(func(key Key, value interface{}) error {

					assert.Equal(t, test.expectedKey, key.String())

					assert.Equal(t, test.expectedIsIndex, key.IsIndex())

					assert.Equal(t, test.expectedIndex, key.Index())

					assert.Equal(t, test.expectedValue, value)

					i++

					return nil

				})

				assert.NoError(t, err)

				assert.Equal(t, 1, i)

			}

		})

	}

}