167 lines
3.3 KiB
Go
167 lines
3.3 KiB
Go
// Copyright (c) 2016 Matthias Neugebauer
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package reducer_test
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import (
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"errors"
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"math"
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"testing"
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"github.com/mtneug/pkg/reducer"
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"github.com/stretchr/testify/require"
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)
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func TestFunc(t *testing.T) {
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t.Parallel()
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var called bool
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testVal := 42.0
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testErr := errors.New("test")
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r := reducer.Func(func(data []float64) (float64, error) {
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called = true
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return testVal, testErr
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})
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called = false
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_, err := r.Reduce(nil)
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require.False(t, called)
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require.EqualError(t, err, reducer.ErrSliceEmpty.Error())
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called = false
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val, err := r.Reduce([]float64{42})
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require.True(t, called)
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require.Equal(t, testErr, err)
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require.Equal(t, testVal, val)
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}
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func TestMax(t *testing.T) {
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t.Parallel()
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testCases := []struct {
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slice []float64
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val float64
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}{
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{
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slice: []float64{1, 2, 3, 4},
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val: 4,
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},
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{
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slice: []float64{-1, -2, -3, -4},
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val: -1,
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},
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{
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slice: []float64{math.Inf(-1), 2, 3, math.Inf(1)},
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val: math.Inf(1),
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},
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}
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r := reducer.Max()
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for _, c := range testCases {
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val, err := r.Reduce(c.slice)
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require.NoError(t, err)
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require.Equal(t, c.val, val)
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}
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}
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func TestMin(t *testing.T) {
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t.Parallel()
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testCases := []struct {
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slice []float64
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val float64
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}{
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{
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slice: []float64{1, 2, 3, 4},
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val: 1,
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},
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{
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slice: []float64{-1, -2, -3, -4},
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val: -4,
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},
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{
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slice: []float64{math.Inf(-1), 2, 3, math.Inf(1)},
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val: math.Inf(-1),
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},
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}
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r := reducer.Min()
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for _, c := range testCases {
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val, err := r.Reduce(c.slice)
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require.NoError(t, err)
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require.Equal(t, c.val, val)
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}
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}
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func TestAvg(t *testing.T) {
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t.Parallel()
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testCases := []struct {
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slice []float64
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val float64
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}{
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{
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slice: []float64{1, 2, 3, 4},
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val: 2.5,
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},
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{
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slice: []float64{-1, -2, -3, -4},
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val: -2.5,
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},
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}
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r := reducer.Avg()
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for _, c := range testCases {
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val, err := r.Reduce(c.slice)
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require.NoError(t, err)
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require.Equal(t, c.val, val)
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}
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}
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func TestSum(t *testing.T) {
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t.Parallel()
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testCases := []struct {
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slice []float64
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val float64
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}{
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{
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slice: []float64{1, 2, 3, 4},
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val: 10,
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},
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{
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slice: []float64{-1, -2, -3, -4},
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val: -10,
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},
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}
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r := reducer.Sum()
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for _, c := range testCases {
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val, err := r.Reduce(c.slice)
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require.NoError(t, err)
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require.Equal(t, c.val, val)
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}
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}
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