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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build example
// +build example
//
// Use "go test -tags=example" to run this test.
package main
import "testing"
func TestIJXYCorners(t *testing.T) {
var d Dims
d.Init(19, 100)
xSize := (d.dim - 1) * d.squareWidth
ySize := (d.dim - 1) * d.squareHeight
ij := IJ{1, 1}
xy := ij.XY(&d)
if xy.x != d.xInset || xy.y != d.yInset+ySize {
t.Errorf("%d got %d", ij, xy)
}
ij = IJ{1, d.dim}
xy = ij.XY(&d)
if xy.x != d.xInset || xy.y != d.yInset {
t.Errorf("%d got %d", ij, xy)
}
ij = IJ{d.dim, 1}
xy = ij.XY(&d)
if xy.x != d.xInset+xSize || xy.y != d.yInset+ySize {
t.Errorf("%d got %d", ij, xy)
}
ij = IJ{d.dim, d.dim}
xy = ij.XY(&d)
if xy.x != d.xInset+xSize || xy.y != d.yInset {
t.Errorf("%d got %d", ij, xy)
}
}
func TestIJXYCenterRoundTrip(t *testing.T) {
var d Dims
d.Init(19, 100)
for i := 1; i <= d.dim; i++ {
for j := 1; j <= d.dim; j++ {
ij := IJ{i, j}
xy := ij.XYCenter(&d)
ij2, ok := xy.IJ(&d)
if !ok {
t.Error("failed to round trip")
}
if ij2 != ij {
t.Errorf("%d round trip got %d\n", ij, ij2)
}
}
}
}
func TestIJString(t *testing.T) {
var d Dims
d.Init(19, 100)
ij := IJ{1, 1}
if ij.String() != "A1" {
t.Errorf("%#v prints as %q", ij, ij.String())
}
ij = IJ{1, 19}
if ij.String() != "A19" {
t.Errorf("%#v prints as %q", ij, ij.String())
}
ij = IJ{19, 1}
if ij.String() != "S1" {
t.Errorf("%#v prints as %q", ij, ij.String())
}
ij = IJ{19, 19}
if ij.String() != "S19" {
t.Errorf("%#v prints as %q", ij, ij.String())
}
}
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