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math: test large negative values as args for trig functions

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Sin/Tan are odd, Cos is even, so it is easy to compute the correct
result from the positive argument case.

Change-Id: If851d00fc7f515ece8199cf56d21186ced51e94f
Reviewed-on: https://go-review.googlesource.com/c/go/+/509815
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Srinivas Pokala <Pokala.Srinivas@ibm.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Keith Randall <khr@google.com>
This commit is contained in:
Keith Randall 2023-07-14 08:34:39 -07:00 committed by Keith Randall
parent 229cde5149
commit 9b33543339
1 changed files with 16 additions and 0 deletions
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16
src/math/huge_test.go
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@ -81,6 +81,10 @@ func TestHugeCos(t *testing.T) {
if !close(f1, f2) { if !close(f1, f2) {
t.Errorf("Cos(%g) = %g, want %g", trigHuge[i], f2, f1) t.Errorf("Cos(%g) = %g, want %g", trigHuge[i], f2, f1)
} }
f3 := Cos(-trigHuge[i])
if !close(f1, f3) {
t.Errorf("Cos(%g) = %g, want %g", -trigHuge[i], f3, f1)
}
} }
} }
@ -91,6 +95,10 @@ func TestHugeSin(t *testing.T) {
if !close(f1, f2) { if !close(f1, f2) {
t.Errorf("Sin(%g) = %g, want %g", trigHuge[i], f2, f1) t.Errorf("Sin(%g) = %g, want %g", trigHuge[i], f2, f1)
} }
f3 := Sin(-trigHuge[i])
if !close(-f1, f3) {
t.Errorf("Sin(%g) = %g, want %g", -trigHuge[i], f3, -f1)
}
} }
} }
@ -101,6 +109,10 @@ func TestHugeSinCos(t *testing.T) {
if !close(f1, f2) || !close(g1, g2) { if !close(f1, f2) || !close(g1, g2) {
t.Errorf("Sincos(%g) = %g, %g, want %g, %g", trigHuge[i], f2, g2, f1, g1) t.Errorf("Sincos(%g) = %g, %g, want %g, %g", trigHuge[i], f2, g2, f1, g1)
} }
f3, g3 := Sincos(-trigHuge[i])
if !close(-f1, f3) || !close(g1, g3) {
t.Errorf("Sincos(%g) = %g, %g, want %g, %g", -trigHuge[i], f3, g3, -f1, g1)
}
} }
} }
@ -111,5 +123,9 @@ func TestHugeTan(t *testing.T) {
if !close(f1, f2) { if !close(f1, f2) {
t.Errorf("Tan(%g) = %g, want %g", trigHuge[i], f2, f1) t.Errorf("Tan(%g) = %g, want %g", trigHuge[i], f2, f1)
} }
f3 := Tan(-trigHuge[i])
if !close(-f1, f3) {
t.Errorf("Tan(%g) = %g, want %g", -trigHuge[i], f3, -f1)
}
} }
} }