clawbot
ac721390de
check / check (push) Successful in 1m7s
The calculator now takes `^` (or `**`) for powers and `%` for modulo. Powers bind tighter than a sign on their left and group to the right, so `-2^2` is `-4` and `2^3^2` is `512`; `%` sits with `*` and `/` and takes the sign of the divisor. A small parser of our own replaces `go/parser`, which cannot express `^`; `go/constant` still computes. A whole-number exponent is exact; a fractional one is computed in float64. Every number is held as a fraction under 4096 bits, and a float64 result must be a normal double, so one message cannot stall the bot; anything else gets "That needs a number too large or too small for me." Disclosure: tiny values below about 2.2e-308, which `next` answered, are now refused. Model: opus-5-5
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
package bot_test
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import (
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"strings"
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"testing"
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"sneak.berlin/go/simplexcalc/internal/bot"
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"sneak.berlin/go/simplexcalc/internal/calc"
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)
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// TestReply: a result is sent bare, and every way of failing gets its
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// own short explanation rather than silence.
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func TestReply(t *testing.T) {
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t.Parallel()
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for in, want := range map[string]string{
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"2 + 2": "4",
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"5 * 5/2": "12.5",
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"2^10": "1024",
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"7 % 3": "1",
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} {
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if got := bot.Reply(in); got != want {
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t.Errorf("Reply(%q) = %q, want %q", in, got, want)
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}
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}
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for in, want := range map[string]string{
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"hello": "I only understand arithmetic",
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"1 / 0": "I cannot divide by zero.",
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"1e400": "That needs a number too large or too small for me.",
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"1e-1300": "That needs a number too large or too small for me.",
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"(-8)^0.5": "A negative number to a fractional power has no real",
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strings.Repeat("1+", calc.MaxInputLength) + "1": "That is too long for me",
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} {
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if got := bot.Reply(in); !strings.HasPrefix(got, want) {
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t.Errorf("Reply(%q) = %q, want it to start %q", in, got, want)
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}
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}
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}
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