572 lines
15 KiB
Go
572 lines
15 KiB
Go
package pixel_test
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import (
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"fmt"
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"math"
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"reflect"
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"testing"
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"github.com/faiface/pixel"
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)
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type rectTestTransform struct {
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name string
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f func(pixel.Rect) pixel.Rect
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}
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func TestResizeRect(t *testing.T) {
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// rectangles
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squareAroundOrigin := pixel.R(-10, -10, 10, 10)
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squareAround2020 := pixel.R(10, 10, 30, 30)
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rectangleAroundOrigin := pixel.R(-20, -10, 20, 10)
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rectangleAround2020 := pixel.R(0, 10, 40, 30)
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// resize transformations
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resizeByHalfAroundCenter := rectTestTransform{"by half around center", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(rect.Center(), rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundMin := rectTestTransform{"by half around Min", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(rect.Min, rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundMax := rectTestTransform{"by half around Max", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(rect.Max, rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundMiddleOfLeftSide := rectTestTransform{"by half around middle of left side", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(pixel.V(rect.Min.X, rect.Center().Y), rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundOrigin := rectTestTransform{"by half around the origin", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(pixel.ZV, rect.Size().Scaled(0.5))
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}}
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testCases := []struct {
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input pixel.Rect
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transform rectTestTransform
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answer pixel.Rect
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}{
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{squareAroundOrigin, resizeByHalfAroundCenter, pixel.R(-5, -5, 5, 5)},
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{squareAround2020, resizeByHalfAroundCenter, pixel.R(15, 15, 25, 25)},
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{rectangleAroundOrigin, resizeByHalfAroundCenter, pixel.R(-10, -5, 10, 5)},
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{rectangleAround2020, resizeByHalfAroundCenter, pixel.R(10, 15, 30, 25)},
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{squareAroundOrigin, resizeByHalfAroundMin, pixel.R(-10, -10, 0, 0)},
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{squareAround2020, resizeByHalfAroundMin, pixel.R(10, 10, 20, 20)},
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{rectangleAroundOrigin, resizeByHalfAroundMin, pixel.R(-20, -10, 0, 0)},
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{rectangleAround2020, resizeByHalfAroundMin, pixel.R(0, 10, 20, 20)},
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{squareAroundOrigin, resizeByHalfAroundMax, pixel.R(0, 0, 10, 10)},
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{squareAround2020, resizeByHalfAroundMax, pixel.R(20, 20, 30, 30)},
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{rectangleAroundOrigin, resizeByHalfAroundMax, pixel.R(0, 0, 20, 10)},
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{rectangleAround2020, resizeByHalfAroundMax, pixel.R(20, 20, 40, 30)},
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{squareAroundOrigin, resizeByHalfAroundMiddleOfLeftSide, pixel.R(-10, -5, 0, 5)},
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{squareAround2020, resizeByHalfAroundMiddleOfLeftSide, pixel.R(10, 15, 20, 25)},
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{rectangleAroundOrigin, resizeByHalfAroundMiddleOfLeftSide, pixel.R(-20, -5, 0, 5)},
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{rectangleAround2020, resizeByHalfAroundMiddleOfLeftSide, pixel.R(0, 15, 20, 25)},
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{squareAroundOrigin, resizeByHalfAroundOrigin, pixel.R(-5, -5, 5, 5)},
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{squareAround2020, resizeByHalfAroundOrigin, pixel.R(5, 5, 15, 15)},
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{rectangleAroundOrigin, resizeByHalfAroundOrigin, pixel.R(-10, -5, 10, 5)},
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{rectangleAround2020, resizeByHalfAroundOrigin, pixel.R(0, 5, 20, 15)},
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}
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for _, testCase := range testCases {
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t.Run(fmt.Sprintf("Resize %v %s", testCase.input, testCase.transform.name), func(t *testing.T) {
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testResult := testCase.transform.f(testCase.input)
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if testResult != testCase.answer {
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t.Errorf("Got: %v, wanted: %v\n", testResult, testCase.answer)
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}
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})
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}
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}
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func TestC(t *testing.T) {
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type args struct {
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radius float64
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center pixel.Vec
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}
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tests := []struct {
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name string
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args args
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want pixel.Circle
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}{
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{
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name: "C(): positive radius",
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args: args{radius: 10, center: pixel.V(0, 0)},
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want: pixel.Circle{Radius: 10, Center: pixel.V(0, 0)},
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},
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{
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name: "C(): zero radius",
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args: args{radius: 0, center: pixel.V(0, 0)},
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want: pixel.Circle{Radius: 0, Center: pixel.V(0, 0)},
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},
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{
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name: "C(): negative radius",
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args: args{radius: -5, center: pixel.V(0, 0)},
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want: pixel.Circle{Radius: -5, Center: pixel.V(0, 0)},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := pixel.C(tt.args.radius, tt.args.center); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("C() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_String(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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want string
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}{
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{
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name: "Circle.String(): positive radius",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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want: "Circle(10.00, Vec(0, 0))",
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},
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{
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name: "Circle.String(): zero radius",
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fields: fields{radius: 0, center: pixel.V(0, 0)},
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want: "Circle(0.00, Vec(0, 0))",
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},
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{
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name: "Circle.String(): negative radius",
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fields: fields{radius: -5, center: pixel.V(0, 0)},
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want: "Circle(-5.00, Vec(0, 0))",
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},
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{
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name: "Circle.String(): irrational radius",
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fields: fields{radius: math.Pi, center: pixel.V(0, 0)},
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want: "Circle(3.14, Vec(0, 0))",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.String(); got != tt.want {
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t.Errorf("Circle.String() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Norm(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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want pixel.Circle
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}{
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{
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name: "Circle.Norm(): positive radius",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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want: pixel.Circle{Radius: 10, Center: pixel.Vec{X: 0, Y: 0}},
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},
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{
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name: "Circle.Norm(): zero radius",
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fields: fields{radius: 0, center: pixel.V(0, 0)},
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want: pixel.Circle{Radius: 0, Center: pixel.Vec{X: 0, Y: 0}},
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},
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{
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name: "Circle.Norm(): negative radius",
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fields: fields{radius: -5, center: pixel.V(0, 0)},
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want: pixel.Circle{Radius: 5, Center: pixel.Vec{X: 0, Y: 0}},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.Norm(); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Circle.Norm() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Diameter(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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want float64
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}{
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{
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name: "Circle.Diameter(): positive radius",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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want: 20,
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},
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{
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name: "Circle.Diameter(): zero radius",
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fields: fields{radius: 0, center: pixel.V(0, 0)},
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want: 0,
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},
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{
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name: "Circle.Diameter(): negative radius",
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fields: fields{radius: -5, center: pixel.V(0, 0)},
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want: -10,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.Diameter(); got != tt.want {
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t.Errorf("Circle.Diameter() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Area(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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want float64
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}{
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{
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name: "Circle.Area(): positive radius",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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want: 20 * math.Pi,
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},
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{
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name: "Circle.Area(): zero radius",
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fields: fields{radius: 0, center: pixel.V(0, 0)},
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want: 0,
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},
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{
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name: "Circle.Area(): negative radius",
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fields: fields{radius: -5, center: pixel.V(0, 0)},
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want: -10 * math.Pi,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.Area(); got != tt.want {
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t.Errorf("Circle.Area() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Moved(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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type args struct {
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delta pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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args args
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want pixel.Circle
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}{
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{
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name: "Circle.Moved(): positive movement",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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args: args{delta: pixel.V(10, 20)},
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want: pixel.Circle{Radius: 10, Center: pixel.Vec{X: 10, Y: 20}},
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},
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{
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name: "Circle.Moved(): zero movement",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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args: args{delta: pixel.ZV},
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want: pixel.Circle{Radius: 10, Center: pixel.Vec{X: 0, Y: 0}},
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},
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{
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name: "Circle.Moved(): negative movement",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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args: args{delta: pixel.V(-5, -10)},
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want: pixel.Circle{Radius: 10, Center: pixel.Vec{X: -5, Y: -10}},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.Moved(tt.args.delta); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Circle.Moved() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Resized(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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type args struct {
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radiusDelta float64
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}
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tests := []struct {
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name string
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fields fields
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args args
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want pixel.Circle
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}{
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{
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name: "Circle.Resized(): positive delta",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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args: args{radiusDelta: 5},
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want: pixel.Circle{Radius: 15, Center: pixel.Vec{X: 0, Y: 0}},
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},
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{
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name: "Circle.Resized(): zero delta",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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args: args{radiusDelta: 0},
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want: pixel.Circle{Radius: 10, Center: pixel.Vec{X: 0, Y: 0}},
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},
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{
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name: "Circle.Resized(): negative delta",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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args: args{radiusDelta: -5},
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want: pixel.Circle{Radius: 5, Center: pixel.Vec{X: 0, Y: 0}},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.Resized(tt.args.radiusDelta); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Circle.Resized() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Contains(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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type args struct {
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u pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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args args
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want bool
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}{
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{
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name: "Circle.Contains(): point on cicles' center",
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fields: fields{radius: 10, center: pixel.ZV},
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args: args{u: pixel.ZV},
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want: true,
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},
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{
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name: "Circle.Contains(): point offcenter",
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fields: fields{radius: 10, center: pixel.V(5, 0)},
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args: args{u: pixel.ZV},
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want: true,
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},
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{
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name: "Circle.Contains(): point on circumference",
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fields: fields{radius: 10, center: pixel.V(10, 0)},
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args: args{u: pixel.ZV},
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want: true,
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},
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{
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name: "Circle.Contains(): point outside circle",
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fields: fields{radius: 10, center: pixel.V(15, 0)},
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args: args{u: pixel.ZV},
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want: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.Contains(tt.args.u); got != tt.want {
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t.Errorf("Circle.Contains() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Union(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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type args struct {
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d pixel.Circle
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}
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tests := []struct {
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name string
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fields fields
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args args
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want pixel.Circle
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}{
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{
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name: "Circle.Union(): overlapping circles",
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fields: fields{radius: 5, center: pixel.ZV},
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args: args{d: pixel.C(5, pixel.ZV)},
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want: pixel.C(5, pixel.ZV),
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},
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{
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name: "Circle.Union(): separate circles",
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fields: fields{radius: 1, center: pixel.ZV},
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args: args{d: pixel.C(1, pixel.V(0, 2))},
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want: pixel.C(2, pixel.V(0, 1)),
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(tt.fields.radius, tt.fields.center)
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if got := c.Union(tt.args.d); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Circle.Union() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestCircle_Intersect(t *testing.T) {
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type fields struct {
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radius float64
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center pixel.Vec
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}
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type args struct {
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d pixel.Circle
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}
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tests := []struct {
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name string
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fields fields
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args args
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want pixel.Circle
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}{
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{
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name: "Circle.Intersect(): intersecting circles",
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fields: fields{radius: 1, center: pixel.V(0, 0)},
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args: args{d: pixel.C(1, pixel.V(1, 0))},
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want: pixel.C(1, pixel.V(0.5, 0)),
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},
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{
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name: "Circle.Intersect(): non-intersecting circles",
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fields: fields{radius: 1, center: pixel.V(0, 0)},
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args: args{d: pixel.C(1, pixel.V(3, 3))},
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want: pixel.C(0, pixel.V(1.5, 1.5)),
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},
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{
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name: "Circle.Intersect(): first circle encompassing second",
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fields: fields{radius: 10, center: pixel.V(0, 0)},
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args: args{d: pixel.C(1, pixel.V(3, 3))},
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want: pixel.C(10, pixel.V(0, 0)),
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},
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{
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name: "Circle.Intersect(): second circle encompassing first",
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fields: fields{radius: 1, center: pixel.V(-1, -4)},
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args: args{d: pixel.C(10, pixel.V(0, 0))},
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want: pixel.C(10, pixel.V(0, 0)),
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},
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{
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name: "Circle.Intersect(): matching circles",
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fields: fields{radius: 1, center: pixel.V(0, 0)},
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args: args{d: pixel.C(1, pixel.V(0, 0))},
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want: pixel.C(1, pixel.V(0, 0)),
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := pixel.C(
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tt.fields.radius,
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tt.fields.center,
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)
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if got := c.Intersect(tt.args.d); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Circle.Intersect() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestMaxCircle(t *testing.T) {
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bigCircle := pixel.C(10, pixel.ZV)
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smallCircle := pixel.C(1, pixel.ZV)
|
|
|
|
type args struct {
|
|
c pixel.Circle
|
|
d pixel.Circle
|
|
}
|
|
tests := []struct {
|
|
name string
|
|
args args
|
|
want pixel.Circle
|
|
}{
|
|
{
|
|
name: "MaxCircle(): first bigger",
|
|
args: args{c: bigCircle, d: smallCircle},
|
|
want: bigCircle,
|
|
},
|
|
{
|
|
name: "MaxCircle(): first smaller",
|
|
args: args{c: smallCircle, d: bigCircle},
|
|
want: bigCircle,
|
|
},
|
|
{
|
|
name: "MaxCircle(): both same size",
|
|
args: args{c: smallCircle, d: smallCircle},
|
|
want: smallCircle,
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
if got := pixel.MaxCircle(tt.args.c, tt.args.d); !reflect.DeepEqual(got, tt.want) {
|
|
t.Errorf("MaxCircle() = %v, want %v", got, tt.want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestMinCircle(t *testing.T) {
|
|
bigCircle := pixel.C(10, pixel.ZV)
|
|
smallCircle := pixel.C(1, pixel.ZV)
|
|
|
|
type args struct {
|
|
c pixel.Circle
|
|
d pixel.Circle
|
|
}
|
|
tests := []struct {
|
|
name string
|
|
args args
|
|
want pixel.Circle
|
|
}{
|
|
{
|
|
name: "MinCircle(): first bigger",
|
|
args: args{c: bigCircle, d: smallCircle},
|
|
want: smallCircle,
|
|
},
|
|
{
|
|
name: "MinCircle(): first smaller",
|
|
args: args{c: smallCircle, d: bigCircle},
|
|
want: smallCircle,
|
|
},
|
|
{
|
|
name: "MinCircle(): both same size",
|
|
args: args{c: smallCircle, d: smallCircle},
|
|
want: smallCircle,
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
if got := pixel.MinCircle(tt.args.c, tt.args.d); !reflect.DeepEqual(got, tt.want) {
|
|
t.Errorf("MinCircle() = %v, want %v", got, tt.want)
|
|
}
|
|
})
|
|
}
|
|
}
|