mirror of
https://github.com/go-sylixos/elvish.git
synced 2024-12-05 03:17:50 +08:00
366 lines
10 KiB
Go
366 lines
10 KiB
Go
package eval_test
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import (
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"math"
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"math/big"
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"math/rand"
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"strings"
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"testing"
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"time"
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"unsafe"
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. "src.elv.sh/pkg/eval"
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"src.elv.sh/pkg/eval/errs"
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"src.elv.sh/pkg/eval/vals"
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. "src.elv.sh/pkg/eval/evaltest"
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)
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const (
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zeros = "0000000000000000000"
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// Values that exceed the range of int64, used for testing bigint.
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z = "1" + zeros + "0"
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z1 = "1" + zeros + "1" // z+1
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z2 = "1" + zeros + "2" // z+2
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z3 = "1" + zeros + "3" // z+3
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zz = "2" + zeros + "0" // 2z
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zz1 = "2" + zeros + "1" // 2z+1
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zz2 = "2" + zeros + "2" // 2z+2
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zz3 = "2" + zeros + "3" // 2z+3
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)
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func TestNum(t *testing.T) {
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Test(t,
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That("num 1").Puts(1),
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That("num "+z).Puts(bigInt(z)),
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That("num 1/2").Puts(big.NewRat(1, 2)),
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That("num 0.1").Puts(0.1),
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That("num (num 1)").Puts(1),
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)
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}
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func TestExactNum(t *testing.T) {
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Test(t,
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That("exact-num 1").Puts(1),
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That("exact-num 0.125").Puts(big.NewRat(1, 8)),
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That("exact-num inf").Throws(errs.BadValue{
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What: "argument here", Valid: "finite float", Actual: "+Inf"}),
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)
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}
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func TestInexactNum(t *testing.T) {
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Test(t,
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That("inexact-num 1").Puts(1.0),
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That("inexact-num 1.0").Puts(1.0),
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That("inexact-num (num 1)").Puts(1.0),
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That("inexact-num (num 1.0)").Puts(1.0),
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)
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}
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func TestFloat64(t *testing.T) {
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Test(t,
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That("float64 1").Puts(1.0).PrintsStderrWith("deprecated"),
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)
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}
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func TestNumCmp(t *testing.T) {
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Test(t,
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// int
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That("< 1 2 3").Puts(true),
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That("< 1 3 2").Puts(false),
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// bigint
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That("< "+args(z1, z2, z3)).Puts(true),
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That("< "+args(z1, z3, z2)).Puts(false),
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// bigint and int
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That("< "+args("1", z1)).Puts(true),
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// bigrat
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That("< 1/4 1/3 1/2").Puts(true),
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That("< 1/4 1/2 1/3").Puts(false),
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// bigrat, bigint and int
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That("< "+args("1/2", "1", z1)).Puts(true),
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That("< "+args("1/2", z1, "1")).Puts(false),
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// float64
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That("< 1.0 2.0 3.0").Puts(true),
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That("< 1.0 3.0 2.0").Puts(false),
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// float64, bigrat and int
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That("< 1.0 3/2 2").Puts(true),
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That("< 1.0 2 3/2").Puts(false),
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// Mixing of types not tested for commands below; they share the same
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// code path as <.
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// int
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That("<= 1 1 2").Puts(true),
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That("<= 1 2 1").Puts(false),
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// bigint
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That("<= "+args(z1, z1, z2)).Puts(true),
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That("<= "+args(z1, z2, z1)).Puts(false),
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// bigrat
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That("<= 1/3 1/3 1/2").Puts(true),
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That("<= 1/3 1/2 1/1").Puts(true),
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// float64
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That("<= 1.0 1.0 2.0").Puts(true),
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That("<= 1.0 2.0 1.0").Puts(false),
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// int
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That("== 1 1 1").Puts(true),
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That("== 1 2 1").Puts(false),
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// bigint
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That("== "+args(z1, z1, z1)).Puts(true),
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That("== "+args(z1, z2, z1)).Puts(false),
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// bigrat
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That("== 1/2 1/2 1/2").Puts(true),
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That("== 1/2 1/3 1/2").Puts(false),
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// float64
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That("== 1.0 1.0 1.0").Puts(true),
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That("== 1.0 2.0 1.0").Puts(false),
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// int
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That("!= 1 2 1").Puts(true),
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That("!= 1 1 2").Puts(false),
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// bigint
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That("!= "+args(z1, z2, z1)).Puts(true),
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That("!= "+args(z1, z1, z2)).Puts(false),
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// bigrat
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That("!= 1/2 1/3 1/2").Puts(true),
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That("!= 1/2 1/2 1/3").Puts(false),
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// float64
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That("!= 1.0 2.0 1.0").Puts(true),
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That("!= 1.0 1.0 2.0").Puts(false),
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// int
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That("> 3 2 1").Puts(true),
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That("> 3 1 2").Puts(false),
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// bigint
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That("> "+args(z3, z2, z1)).Puts(true),
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That("> "+args(z3, z1, z2)).Puts(false),
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// bigrat
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That("> 1/2 1/3 1/4").Puts(true),
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That("> 1/2 1/4 1/3").Puts(false),
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// float64
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That("> 3.0 2.0 1.0").Puts(true),
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That("> 3.0 1.0 2.0").Puts(false),
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// int
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That(">= 3 3 2").Puts(true),
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That(">= 3 2 3").Puts(false),
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// bigint
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That(">= "+args(z3, z3, z2)).Puts(true),
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That(">= "+args(z3, z2, z3)).Puts(false),
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// bigrat
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That(">= 1/2 1/2 1/3").Puts(true),
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That(">= 1/2 1/3 1/2").Puts(false),
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// float64
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That(">= 3.0 3.0 2.0").Puts(true),
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That(">= 3.0 2.0 3.0").Puts(false),
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)
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}
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func TestArithmeticCommands(t *testing.T) {
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Test(t,
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// No argument
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That("+").Puts(0),
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// int
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That("+ 233100 233").Puts(233333),
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// bigint
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That("+ "+args(z, z1)).Puts(bigInt(zz1)),
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// bigint and int
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That("+ 1 2 "+z).Puts(bigInt(z3)),
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// bigrat
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That("+ 1/2 1/3 1/4").Puts(big.NewRat(13, 12)),
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// bigrat, bigint and int
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That("+ 1/2 1/2 1 "+z).Puts(bigInt(z2)),
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// float64
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That("+ 0.5 0.25 1.0").Puts(1.75),
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// float64 and other types
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That("+ 0.5 1/4 1").Puts(1.75),
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// Mixing of types not tested for commands below; they share the same
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// code path as +.
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That("-").Throws(ErrorWithType(errs.ArityMismatch{})),
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// One argument - negation
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That("- 233").Puts(-233),
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That("- "+z).Puts(bigInt("-"+z)),
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That("- 1/2").Puts(big.NewRat(-1, 2)),
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That("- 1.0").Puts(-1.0),
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// int
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That("- 20 10 2").Puts(8),
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// bigint
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That("- "+args(zz3, z1)).Puts(bigInt(z2)),
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// bigrat
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That("- 1/2 1/3").Puts(big.NewRat(1, 6)),
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// float64
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That("- 2.0 1.0 0.5").Puts(0.5),
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// No argument
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That("*").Puts(1),
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// int
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That("* 2 7 4").Puts(56),
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// bigint
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That("* 2 "+z1).Puts(bigInt(zz2)),
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// bigrat
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That("* 1/2 1/3").Puts(big.NewRat(1, 6)),
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// float64
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That("* 2.0 0.5 1.75").Puts(1.75),
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// 0 * non-infinity
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That("* 0 1/2 1.0").Puts(0),
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// 0 * infinity
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That("* 0 +Inf").Puts(math.NaN()),
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// One argument - inversion
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That("/ 2").Puts(big.NewRat(1, 2)),
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That("/ "+z).Puts(bigRat("1/"+z)),
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That("/ 2.0").Puts(0.5),
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// int
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That("/ 233333 353").Puts(661),
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That("/ 3 4 2").Puts(big.NewRat(3, 8)),
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// bigint
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That("/ "+args(zz, z)).Puts(2),
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That("/ "+args(zz, "2")).Puts(bigInt(z)),
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That("/ "+args(z1, z)).Puts(bigRat(z1+"/"+z)),
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// float64
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That("/ 1.0 2.0 4.0").Puts(0.125),
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// 0 / non-zero
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That("/ 0 1/2 0.1").Puts(0),
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// anything / 0
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That("/ 0 0").Throws(ErrDivideByZero, "/ 0 0"),
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That("/ 1 0").Throws(ErrDivideByZero, "/ 1 0"),
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That("/ 1.0 0").Throws(ErrDivideByZero, "/ 1.0 0"),
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That("% 23 7").Puts(2),
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That("% 1 0").Throws(ErrDivideByZero, "% 1 0"),
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)
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}
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func TestRandint(t *testing.T) {
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Test(t,
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That("randint 1 2").Puts(1),
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That("randint 1").Puts(0),
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That("var i = (randint 10 100); and (<= 10 $i) (< $i 100)").Puts(true),
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That("var i = (randint 10); and (<= 0 $i) (< $i 10)").Puts(true),
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That("randint 2 1").Throws(
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errs.BadValue{What: "high value", Valid: "larger than 2", Actual: "1"},
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"randint 2 1"),
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That("randint").Throws(ErrorWithType(errs.ArityMismatch{}), "randint"),
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That("randint 1 2 3").Throws(ErrorWithType(errs.ArityMismatch{}), "randint 1 2 3"),
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)
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}
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func TestRandSeed(t *testing.T) {
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// Reseed to make other RNG-dependent tests non-deterministic
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defer rand.Seed(time.Now().UTC().UnixNano())
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Test(t,
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// Observe that the effect of -randseed is making randint deterministic
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That("fn f { -randseed 0; randint 10 }; eq (f) (f)").Puts(true),
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)
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}
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var (
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maxInt = 1<<((unsafe.Sizeof(0)*8)-1) - 1
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minInt = -maxInt - 1
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maxDenseIntInFloat = float64(1 << 53)
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)
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func TestRange(t *testing.T) {
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Test(t,
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// Basic argument sanity checks.
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That("range").Throws(ErrorWithType(errs.ArityMismatch{})),
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That("range 0 1 2").Throws(ErrorWithType(errs.ArityMismatch{})),
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// Int count up.
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That("range 3").Puts(0, 1, 2),
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That("range 1 3").Puts(1, 2),
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// Int count down.
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That("range -1 10 &step=3").Puts(-1, 2, 5, 8),
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That("range 3 -3").Puts(3, 2, 1, 0, -1, -2),
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// Near maxInt or minInt.
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That("range "+args(maxInt-2, maxInt)).Puts(maxInt-2, maxInt-1),
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That("range "+args(maxInt, maxInt-2)).Puts(maxInt, maxInt-1),
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That("range "+args(minInt, minInt+2)).Puts(minInt, minInt+1),
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That("range "+args(minInt+2, minInt)).Puts(minInt+2, minInt+1),
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// Invalid step given the "start" and "end" values of the range.
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That("range &step=-1 1").
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Throws(errs.BadValue{What: "step", Valid: "positive", Actual: "-1"}),
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That("range &step=1 1 0").
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Throws(errs.BadValue{What: "step", Valid: "negative", Actual: "1"}),
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thatOutputErrorIsBubbled("range 2"),
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// Big int count up.
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That("range "+z+" "+z3).Puts(bigInt(z), bigInt(z1), bigInt(z2)),
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That("range "+z+" "+z3+" &step=2").Puts(bigInt(z), bigInt(z2)),
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// Big int count down.
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That("range "+z3+" "+z).Puts(bigInt(z3), bigInt(z2), bigInt(z1)),
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That("range "+z3+" "+z+" &step=-2").Puts(bigInt(z3), bigInt(z1)),
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// Invalid big int step.
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That("range &step=-"+z+" 10").
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Throws(errs.BadValue{What: "step", Valid: "positive", Actual: "-" + z}),
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That("range &step="+z+" 10 0").
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Throws(errs.BadValue{What: "step", Valid: "negative", Actual: z}),
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thatOutputErrorIsBubbled("range "+z+" "+z1),
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// Rational count up.
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That("range 23/10").Puts(0, 1, 2),
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That("range 1/10 23/10").Puts(
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big.NewRat(1, 10), big.NewRat(11, 10), big.NewRat(21, 10)),
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That("range 23/10 1/10").Puts(
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big.NewRat(23, 10), big.NewRat(13, 10), big.NewRat(3, 10)),
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That("range 1/10 9/10 &step=3/10").Puts(
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big.NewRat(1, 10), big.NewRat(4, 10), big.NewRat(7, 10)),
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// Rational count down.
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That("range 9/10 0/10 &step=-3/10").Puts(
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big.NewRat(9, 10), big.NewRat(6, 10), big.NewRat(3, 10)),
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// Invalid rational step.
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That("range &step=-1/2 10").
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Throws(errs.BadValue{What: "step", Valid: "positive", Actual: "-1/2"}),
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That("range &step=1/2 10 0").
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Throws(errs.BadValue{What: "step", Valid: "negative", Actual: "1/2"}),
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thatOutputErrorIsBubbled("range 1/2 3/2"),
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// Float64 count up.
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That("range 1.2").Puts(0.0, 1.0),
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That("range &step=0.5 1 3").Puts(1.0, 1.5, 2.0, 2.5),
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// Float64 count down.
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That("range 1.2 -1.2").Puts(1.2, Approximately(0.2), Approximately(-0.8)),
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That("range &step=-0.5 3 1").Puts(3.0, 2.5, 2.0, 1.5),
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// Near maxDenseIntInFloat.
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That("range "+args(maxDenseIntInFloat-2, "+inf")).
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Puts(maxDenseIntInFloat-2, maxDenseIntInFloat-1, maxDenseIntInFloat),
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That("range "+args(maxDenseIntInFloat, maxDenseIntInFloat-2)).
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Puts(maxDenseIntInFloat, maxDenseIntInFloat-1),
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// Invalid float64 step.
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That("range &step=-0.5 10").
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Throws(errs.BadValue{What: "step", Valid: "positive", Actual: "-0.5"}),
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That("range &step=0.5 10 0").
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Throws(errs.BadValue{What: "step", Valid: "negative", Actual: "0.5"}),
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thatOutputErrorIsBubbled("range 1.2"),
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)
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}
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func bigInt(s string) *big.Int {
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z, ok := new(big.Int).SetString(s, 0)
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if !ok {
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panic("cannot parse as big int: " + s)
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}
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return z
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}
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func bigRat(s string) *big.Rat {
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z, ok := new(big.Rat).SetString(s)
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if !ok {
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panic("cannot parse as big rat: " + s)
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}
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return z
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}
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func args(vs ...any) string {
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s := make([]string, len(vs))
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for i, v := range vs {
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s[i] = vals.ToString(v)
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}
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return strings.Join(s, " ")
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}
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