35 lines
1.1 KiB
Go
35 lines
1.1 KiB
Go
package cat
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import "testing"
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func TestNeedRecentre(t *testing.T) {
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pan := panView{centre: 14.100, width: 0.200}
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// A spot the display is already showing comfortably: leave the window alone,
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// which is the whole point of the option being off.
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if needRecentre(pan, 14.110, 0.200, false) {
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t.Fatal("moved a display that was already on the spot")
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}
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// Narrowing for a CW spot 40 kHz away: 25 kHz around the old centre would not
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// reach it, so the centre must follow.
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if !needRecentre(pan, 14.060, 0.025, false) {
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t.Fatal("spot would have been left outside the new window")
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}
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// Near the very edge of the new window — visible in the arithmetic, useless
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// in practice.
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if !needRecentre(pan, 14.199, 0.200, false) {
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t.Fatal("spot pinned to the edge counts as outside")
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}
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// The operator asked for it.
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if !needRecentre(pan, 14.110, 0.200, true) {
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t.Fatal("forced centring ignored")
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}
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// No pan status yet: assume the display is elsewhere.
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if !needRecentre(panView{}, 14.110, 0.200, false) {
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t.Fatal("unknown centre must re-centre")
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}
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// Nothing to centre on.
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if needRecentre(pan, 0, 0.200, true) {
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t.Fatal("centred on nothing")
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}
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}
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