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-rw-r--r--vendor/github.com/golang/geo/s2/matrix3x3_test.go494
1 files changed, 494 insertions, 0 deletions
diff --git a/vendor/github.com/golang/geo/s2/matrix3x3_test.go b/vendor/github.com/golang/geo/s2/matrix3x3_test.go
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index 0000000..b833f3f
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+++ b/vendor/github.com/golang/geo/s2/matrix3x3_test.go
@@ -0,0 +1,494 @@
+/*
+Copyright 2015 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package s2
+
+import (
+ "math"
+ "testing"
+
+ "github.com/golang/geo/r3"
+)
+
+func TestCol(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ col int
+ want Point
+ }{
+ {&matrix3x3{}, 0, OriginPoint()},
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ 0,
+ Point{r3.Vector{1, 4, 7}},
+ },
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ 2,
+ Point{r3.Vector{3, 6, 9}},
+ },
+ }
+
+ for _, test := range tests {
+ if got := test.have.col(test.col); !got.ApproxEqual(test.want) {
+ t.Errorf("%v.col(%d) = %v, want %v", test.have, test.col, got, test.want)
+ }
+ }
+}
+
+func TestRow(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ row int
+ want Point
+ }{
+ {&matrix3x3{}, 0, OriginPoint()},
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ 0,
+ Point{r3.Vector{1, 2, 3}},
+ },
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ 2,
+ Point{r3.Vector{7, 8, 9}},
+ },
+ }
+
+ for _, test := range tests {
+ if got := test.have.row(test.row); !got.ApproxEqual(test.want) {
+ t.Errorf("%v.row(%d) = %v, want %v", test.have, test.row, got, test.want)
+ }
+ }
+}
+
+func TestSetCol(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ col int
+ point Point
+ want *matrix3x3
+ }{
+ {
+ &matrix3x3{},
+ 0,
+ Point{r3.Vector{1, 1, 0}},
+ &matrix3x3{
+ {1, 0, 0},
+ {1, 0, 0},
+ {0, 0, 0},
+ },
+ },
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ 2,
+ Point{r3.Vector{1, 1, 0}},
+ &matrix3x3{
+ {1, 2, 1},
+ {4, 5, 1},
+ {7, 8, 0},
+ },
+ },
+ }
+
+ for _, test := range tests {
+ if got := test.have.setCol(test.col, test.point); !matricesApproxEqual(got, test.want) {
+ t.Errorf("%v.setCol(%d, %v) = %v, want %v", test.have, test.col, test.point, got, test.want)
+ }
+ }
+}
+
+func TestSetRow(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ row int
+ point Point
+ want *matrix3x3
+ }{
+ {
+ &matrix3x3{},
+ 0,
+ Point{r3.Vector{1, 1, 0}},
+ &matrix3x3{
+ {1, 1, 0},
+ {0, 0, 0},
+ {0, 0, 0},
+ },
+ },
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ 2,
+ Point{r3.Vector{1, 1, 0}},
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {1, 1, 0},
+ },
+ },
+ }
+ for _, test := range tests {
+ if got := test.have.setRow(test.row, test.point); !matricesApproxEqual(got, test.want) {
+ t.Errorf("%v.setRow(%d, %v) = %v, want %v", test.have, test.row, test.point, got, test.want)
+ }
+ }
+}
+
+func TestScale(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ scale float64
+ want *matrix3x3
+ }{
+ {
+ &matrix3x3{},
+ 0,
+ &matrix3x3{},
+ },
+ {
+ &matrix3x3{
+ {1, 1, 1},
+ {1, 1, 1},
+ {1, 1, 1},
+ },
+ 0,
+ &matrix3x3{},
+ },
+ {
+ &matrix3x3{
+ {1, 1, 1},
+ {1, 1, 1},
+ {1, 1, 1},
+ },
+ 1,
+ &matrix3x3{
+ {1, 1, 1},
+ {1, 1, 1},
+ {1, 1, 1},
+ },
+ },
+ {
+ &matrix3x3{
+ {1, 1, 1},
+ {1, 1, 1},
+ {1, 1, 1},
+ },
+ 5,
+ &matrix3x3{
+ {5, 5, 5},
+ {5, 5, 5},
+ {5, 5, 5},
+ },
+ },
+ {
+ &matrix3x3{
+ {-2, 2, -3},
+ {-1, 1, 3},
+ {2, 0, -1},
+ },
+ 2.75,
+ &matrix3x3{
+ {-5.5, 5.5, -8.25},
+ {-2.75, 2.75, 8.25},
+ {5.5, 0, -2.75},
+ },
+ },
+ }
+
+ for _, test := range tests {
+ if got := test.have.scale(test.scale); !matricesApproxEqual(got, test.want) {
+ t.Errorf("%v.scale(%f) = %v, want %v", test.have, test.scale, got, test.want)
+ }
+ }
+}
+
+func TestMul(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ point Point
+ want Point
+ }{
+ {&matrix3x3{}, Point{}, Point{}},
+ {
+ &matrix3x3{
+ {1, 1, 1},
+ {1, 1, 1},
+ {1, 1, 1},
+ },
+ Point{},
+ Point{},
+ },
+ {
+ // Identity times something gives back the something
+ &matrix3x3{
+ {1, 0, 0},
+ {0, 1, 0},
+ {0, 0, 1},
+ },
+ Point{},
+ Point{},
+ },
+ {
+ // Identity times something gives back the something
+ &matrix3x3{
+ {1, 0, 0},
+ {0, 1, 0},
+ {0, 0, 1},
+ },
+ Point{r3.Vector{1, 2, 3}},
+ Point{r3.Vector{1, 2, 3}},
+ },
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ Point{r3.Vector{1, 1, 1}},
+ Point{r3.Vector{6, 15, 24}},
+ },
+ }
+ for _, test := range tests {
+ if got := test.have.mul(test.point); !got.ApproxEqual(test.want) {
+ t.Errorf("%v.mul(%v) = %v, want %v", test.have, test.point, got, test.want)
+ }
+ }
+}
+
+func TestDet(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ want float64
+ }{
+ {
+ &matrix3x3{},
+ 0,
+ },
+ {
+ // Matrix of all the same values has det of 0.
+ &matrix3x3{
+ {1, 1, 1},
+ {1, 1, 1},
+ {1, 1, 1},
+ },
+ 0,
+ },
+ {
+ // Identity matrix has det of 1.
+ &matrix3x3{
+ {1, 0, 0},
+ {0, 1, 0},
+ {0, 0, 1},
+ },
+ 1,
+ },
+ {
+ &matrix3x3{
+ {-2, 2, -3},
+ {-1, 1, 3},
+ {2, 0, -1},
+ },
+ 18,
+ },
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ 0,
+ },
+ {
+ &matrix3x3{
+ {9, 8, 7},
+ {6, 5, 4},
+ {3, 2, 1},
+ },
+ 0,
+ },
+ {
+ &matrix3x3{
+ {1.74, math.E, 42},
+ {math.Pi, math.Sqrt2, math.Ln10},
+ {3, math.SqrtPhi, 9.8976},
+ },
+ -56.838525224123096,
+ },
+ }
+
+ for _, test := range tests {
+ if got := test.have.det(); !float64Eq(got, test.want) {
+ t.Errorf("%v.det() = %v, want %v", test.have, got, test.want)
+ }
+ }
+}
+
+func TestTranspose(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ want *matrix3x3
+ }{
+ {&matrix3x3{}, &matrix3x3{}},
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ &matrix3x3{
+ {1, 4, 7},
+ {2, 5, 8},
+ {3, 6, 9},
+ },
+ },
+ {
+ &matrix3x3{
+ {1, 0, 0},
+ {0, 2, 0},
+ {0, 0, 3},
+ },
+ &matrix3x3{
+ {1, 0, 0},
+ {0, 2, 0},
+ {0, 0, 3},
+ },
+ },
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {0, 4, 5},
+ {0, 0, 6},
+ },
+ &matrix3x3{
+ {1, 0, 0},
+ {2, 4, 0},
+ {3, 5, 6},
+ },
+ },
+ {
+ &matrix3x3{
+ {1, 1, 1},
+ {0, 0, 0},
+ {0, 0, 0},
+ },
+ &matrix3x3{
+ {1, 0, 0},
+ {1, 0, 0},
+ {1, 0, 0},
+ },
+ },
+ }
+
+ for _, test := range tests {
+ if got := test.have.transpose().transpose(); !matricesApproxEqual(got, test.have) {
+ t.Errorf("%v.transpose().transpose() = %v, want %v", test.have, got, test.have)
+ }
+
+ if got := test.have.transpose(); !matricesApproxEqual(got, test.want) {
+ t.Errorf("%v.transpose() = %v, want %v", test.have, got, test.want)
+ }
+
+ }
+}
+
+func TestString(t *testing.T) {
+ tests := []struct {
+ have *matrix3x3
+ want string
+ }{
+ {
+ &matrix3x3{
+ {1, 2, 3},
+ {4, 5, 6},
+ {7, 8, 9},
+ },
+ `[ 1.0000 2.0000 3.0000 ] [ 4.0000 5.0000 6.0000 ] [ 7.0000 8.0000 9.0000 ]`,
+ },
+ {
+ &matrix3x3{
+ {1, 4, 7},
+ {2, 5, 8},
+ {3, 6, 9},
+ },
+ `[ 1.0000 4.0000 7.0000 ] [ 2.0000 5.0000 8.0000 ] [ 3.0000 6.0000 9.0000 ]`,
+ },
+ }
+
+ for _, test := range tests {
+ if got := test.have.String(); got != test.want {
+ t.Errorf("%v.String() = %v, want %v", test.have, got, test.want)
+ }
+ }
+}
+
+func TestFrames(t *testing.T) {
+ z := PointFromCoords(0.2, 0.5, -3.3)
+ m := getFrame(z)
+
+ if !m.col(0).IsUnit() {
+ t.Errorf("col(0) of frame not unit length")
+ }
+ if !m.col(1).IsUnit() {
+ t.Errorf("col(1) of frame not unit length")
+ }
+ if !float64Eq(m.det(), 1) {
+ t.Errorf("determinant of frame = %v, want %v", m.det(), 1)
+ }
+
+ tests := []struct {
+ a Point
+ b Point
+ }{
+ {m.col(2), z},
+
+ {toFrame(m, m.col(0)), Point{r3.Vector{1, 0, 0}}},
+ {toFrame(m, m.col(1)), Point{r3.Vector{0, 1, 0}}},
+ {toFrame(m, m.col(2)), Point{r3.Vector{0, 0, 1}}},
+
+ {fromFrame(m, Point{r3.Vector{1, 0, 0}}), m.col(0)},
+ {fromFrame(m, Point{r3.Vector{0, 1, 0}}), m.col(1)},
+ {fromFrame(m, Point{r3.Vector{0, 0, 1}}), m.col(2)},
+ }
+
+ for _, test := range tests {
+ if !pointsApproxEquals(test.a, test.b, epsilon) {
+ t.Errorf("%v != %v", test.a, test.b)
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2026-02-10 23:56:54 +0000