mirror of
https://github.com/gonum/gonum.git
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100 lines
3.1 KiB
Go
100 lines
3.1 KiB
Go
// Copyright ©2019 The Gonum Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package f32_test
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import (
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"testing"
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. "gonum.org/v1/gonum/internal/asm/f32"
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)
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func TestL2NormUnitary(t *testing.T) {
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const tol = 1e-7
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var src_gd float32 = 1
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for j, v := range []struct {
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want float32
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x []float32
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}{
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{want: 0, x: []float32{}},
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{want: 2, x: []float32{2}},
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{want: 3.7416573867739413, x: []float32{1, 2, 3}},
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{want: 3.7416573867739413, x: []float32{-1, -2, -3}},
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{want: nan, x: []float32{nan}},
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{want: 17.88854381999832, x: []float32{8, -8, 8, -8, 8}},
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{want: 2.23606797749979, x: []float32{0, 1, 0, -1, 0, 1, 0, -1, 0, 1}},
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} {
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g_ln := 4 + j%2
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v.x = guardVector(v.x, src_gd, g_ln)
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src := v.x[g_ln : len(v.x)-g_ln]
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ret := L2NormUnitary(src)
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if !sameApprox(ret, v.want, tol) {
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t.Errorf("Test %d L2Norm error Got: %f Expected: %f", j, ret, v.want)
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}
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if !isValidGuard(v.x, src_gd, g_ln) {
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t.Errorf("Test %d Guard violated in src vector %v %v", j, v.x[:g_ln], v.x[len(v.x)-g_ln:])
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}
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}
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}
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func TestL2NormInc(t *testing.T) {
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const tol = 1e-7
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var src_gd float32 = 1
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for j, v := range []struct {
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inc int
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want float32
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x []float32
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}{
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{inc: 2, want: 0, x: []float32{}},
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{inc: 3, want: 2, x: []float32{2}},
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{inc: 10, want: 3.7416573867739413, x: []float32{1, 2, 3}},
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{inc: 5, want: 3.7416573867739413, x: []float32{-1, -2, -3}},
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{inc: 3, want: nan, x: []float32{nan}},
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{inc: 15, want: 17.88854381999832, x: []float32{8, -8, 8, -8, 8}},
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{inc: 1, want: 2.23606797749979, x: []float32{0, 1, 0, -1, 0, 1, 0, -1, 0, 1}},
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} {
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g_ln, ln := 4+j%2, len(v.x)
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v.x = guardIncVector(v.x, src_gd, v.inc, g_ln)
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src := v.x[g_ln : len(v.x)-g_ln]
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ret := L2NormInc(src, uintptr(ln), uintptr(v.inc))
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if !sameApprox(ret, v.want, tol) {
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t.Errorf("Test %d L2NormInc error Got: %f Expected: %f", j, ret, v.want)
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}
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checkValidIncGuard(t, v.x, src_gd, v.inc, g_ln)
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}
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}
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func TestL2DistanceUnitary(t *testing.T) {
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const tol = 1e-7
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var src_gd float32 = 1
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for j, v := range []struct {
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want float32
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x, y []float32
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}{
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{want: 0, x: []float32{}, y: []float32{}},
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{want: 2, x: []float32{3}, y: []float32{1}},
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{want: 3.7416573867739413, x: []float32{2, 4, 6}, y: []float32{1, 2, 3}},
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{want: 3.7416573867739413, x: []float32{1, 2, 3}, y: []float32{2, 4, 6}},
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{want: nan, x: []float32{nan}, y: []float32{0}},
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{want: 17.88854381999832, x: []float32{9, -9, 9, -9, 9}, y: []float32{1, -1, 1, -1, 1}},
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{want: 2.23606797749979, x: []float32{0, 1, 0, -1, 0, 1, 0, -1, 0, 1}, y: []float32{0, 2, 0, -2, 0, 2, 0, -2, 0, 2}},
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} {
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g_ln := 4 + j%2
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v.x = guardVector(v.x, src_gd, g_ln)
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v.y = guardVector(v.y, src_gd, g_ln)
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srcX := v.x[g_ln : len(v.x)-g_ln]
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srcY := v.y[g_ln : len(v.y)-g_ln]
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ret := L2DistanceUnitary(srcX, srcY)
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if !sameApprox(ret, v.want, tol) {
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t.Errorf("Test %d L2Distance error Got: %f Expected: %f", j, ret, v.want)
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}
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if !isValidGuard(v.x, src_gd, g_ln) {
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t.Errorf("Test %d Guard violated in src vector %v %v", j, v.x[:g_ln], v.x[len(v.x)-g_ln:])
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}
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}
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}
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