mirror of
https://github.com/go-sylixos/elvish.git
synced 2024-12-04 10:57:50 +08:00
326 lines
8.7 KiB
Go
326 lines
8.7 KiB
Go
package eval
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import (
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"errors"
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"os"
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"reflect"
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"strconv"
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"syscall"
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"testing"
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"github.com/elves/elvish/parse"
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"github.com/elves/elvish/util"
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)
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func TestNewEvaler(t *testing.T) {
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ev := NewEvaler(nil)
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pid := strconv.Itoa(syscall.Getpid())
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if ToString(ev.builtin["pid"].Get()) != pid {
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t.Errorf(`ev.builtin["pid"] = %v, want %v`, ev.builtin["pid"], pid)
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}
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}
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var errAny = errors.New("")
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type more struct {
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wantBytesOut []byte
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wantError error
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}
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var nomore more
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var evalTests = []struct {
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text string
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wantOut []Value
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more
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}{
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// Chunks.
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// Empty chunk
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{"", []Value{}, nomore},
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// Outputs of pipelines in a chunk are concatenated
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{"put x; put y; put z", strs("x", "y", "z"), nomore},
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// A failed pipeline cause the whole chunk to fail
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{"put a; false; put b", strs("a"), more{
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wantError: FakeExternalCmdExit(1, 0)}},
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// Pipelines.
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// Pure byte pipeline
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{`echo "Albert\nAllan\nAlbraham\nBerlin" | sed s/l/1/g | grep e`,
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[]Value{}, more{wantBytesOut: []byte("A1bert\nBer1in\n")}},
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// Pure channel pipeline
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{`put 233 42 19 | each [x]{+ $x 10}`, strs("243", "52", "29"), nomore},
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// TODO: Add a useful hybrid pipeline sample
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// List element assignment
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{"li=[foo bar]; li[0]=233; put-all $li", strs("233", "bar"), nomore},
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// Map element assignment
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{"di=[&k=v]; di[k]=lorem; di[k2]=ipsum; put $di[k] $di[k2]",
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strs("lorem", "ipsum"), nomore},
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{"d=[&a=[&b=v]]; put $d[a][b]; d[a][b]=u; put $d[a][b]",
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strs("v", "u"), nomore},
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// Multi-assignments.
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{"{a,b}=`put a b`; put $a $b", strs("a", "b"), nomore},
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{"@a=`put a b`; put $@a", strs("a", "b"), nomore},
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{"{a,@b}=`put a b c`; put $@b", strs("b", "c"), nomore},
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// {"di=[&]; di[a b]=`put a b`; put $di[a] $di[b]", strs("a", "b"), nomore},
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// Control structures.
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// if
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{"if true; then put then; fi", strs("then"), nomore},
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{"if false; then put then; else put else; fi", strs("else"), nomore},
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{"if false; then put 1; elif false; then put 2; else put 3; fi",
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strs("3"), nomore},
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{"if false; then put 2; elif true; then put 2; else put 3; fi",
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strs("2"), nomore},
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// while
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{"x=0; while lt $x 4; do put $x; x=(+ $x 1); done",
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strs("0", "1", "2", "3"), nomore},
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// for
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{"for x in tempora mores; do put 'O '$x; done",
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strs("O tempora", "O mores"), nomore},
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// break
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{"for x in a; do break; else put $x; done", strs(), nomore},
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// else
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{"for x in a; do put $x; else put $x; done", strs("a"), nomore},
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// continue
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{"for x in a b; do put $x; continue; put $x; done", strs("a", "b"), nomore},
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// begin/end
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{"begin; put lorem; put ipsum; end", strs("lorem", "ipsum"), nomore},
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// Redirections.
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{"f=`mktemp elvXXXXXX`; echo 233 > $f; cat < $f; rm $f", strs(),
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more{wantBytesOut: []byte("233\n")}},
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// Compounding.
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{"put {fi,elvi}sh{1.0,1.1}",
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strs("fish1.0", "fish1.1", "elvish1.0", "elvish1.1"), nomore},
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// List, map and indexing
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{"println [a b c] [&key=value] | from-lines",
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strs("[a b c] [&key=value]"), nomore},
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{"put [a b c][2]", strs("c"), nomore},
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{"put [&key=value][key]", strs("value"), nomore},
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// String literal
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{`put 'such \"''literal'`, strs(`such \"'literal`), nomore},
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{`put "much \n\033[31;1m$cool\033[m"`,
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strs("much \n\033[31;1m$cool\033[m"), nomore},
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// Output capture
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{"put (put lorem ipsum)", strs("lorem", "ipsum"), nomore},
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// Status capture
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{"put ?(true|false|false)",
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[]Value{newMultiError(
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OK,
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Error{FakeExternalCmdExit(1, 0)},
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Error{FakeExternalCmdExit(1, 0)},
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)}, nomore},
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// Variable and compounding
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{"x='SHELL'\nput 'WOW, SUCH '$x', MUCH COOL'\n",
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strs("WOW, SUCH SHELL, MUCH COOL"), nomore},
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// Splicing
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{"x=[elvish rules]; put $@x", strs("elvish", "rules"), nomore},
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// Wildcard.
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{"put /*", strs(util.RootStar()...), nomore},
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// Tilde.
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{"h=$env:HOME; env:HOME=/foo; put ~ ~/src; env:HOME=$h",
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strs("/foo", "/foo/src"), nomore},
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// Closure
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// Basics
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{"[]{ }", strs(), nomore},
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{"[x]{put $x} foo", strs("foo"), nomore},
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// Variable capture
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{"x=lorem; []{x=ipsum}; put $x", strs("ipsum"), nomore},
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{"x=lorem; []{ put $x; x=ipsum }; put $x",
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strs("lorem", "ipsum"), nomore},
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// Shadowing
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{"x=ipsum; []{ local:x=lorem; put $x }; put $x",
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strs("lorem", "ipsum"), nomore},
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// Shadowing by argument
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{"x=ipsum; [x]{ put $x; x=BAD } lorem; put $x",
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strs("lorem", "ipsum"), nomore},
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// Closure captures new local variables every time
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{`fn f []{ x=0; put []{x=(+ $x 1)} []{put $x} }
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{inc1,put1}=(f); $put1; $inc1; $put1
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{inc2,put2}=(f); $put2; $inc2; $put2`,
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strs("0", "1", "0", "1"), nomore},
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// fn.
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{"fn f [x]{ put x=$x'.' }; f lorem; f ipsum",
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strs("x=lorem.", "x=ipsum."), nomore},
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// return.
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{"fn f []{ put a; return; put b }; f", strs("a"), nomore},
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// rest args and $args.
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{"[x @xs]{ put $x $xs $args } a b c",
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[]Value{String("a"),
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NewList(String("b"), String("c")),
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NewList(String("a"), String("b"), String("c"))}, nomore},
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// $args.
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{"{ put $args } lorem ipsum",
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[]Value{NewList(String("lorem"), String("ipsum"))}, nomore},
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// Namespaces
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// Pseudo-namespaces local: and up:
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{"x=lorem; []{local:x=ipsum; put $up:x $local:x}",
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strs("lorem", "ipsum"), nomore},
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{"x=lorem; []{up:x=ipsum; put $x}; put $x",
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strs("ipsum", "ipsum"), nomore},
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// Pseudo-namespace env:
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{"env:foo=lorem; put $env:foo", strs("lorem"), nomore},
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{"del env:foo; put $env:foo", strs(""), nomore},
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// TODO: Test module namespace
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// Builtin functions
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// Arithmetics
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// TODO test more edge cases
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{"+ 233100 233", strs("233333"), nomore},
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{"- 233333 233100", strs("233"), nomore},
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{"mul 353 661", strs("233333"), nomore},
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{"div 233333 353", strs("661"), nomore},
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{"div 1 0", strs("+Inf"), nomore},
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// Equality
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{"put ?(= a a) ?(= [] []) ?(= [&] [&])",
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[]Value{Error{nil}, Error{ErrNotEqual}, Error{ErrNotEqual}}, nomore},
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{"kind-of bare 'str' [] [&] []{ }",
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strs("string", "string", "list", "map", "fn"), nomore},
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{"put ?(fail failed)", []Value{Error{errors.New("failed")}}, nomore},
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{`put "l\norem" ipsum | into-lines`, strs(),
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more{wantBytesOut: []byte("l\norem\nipsum\n")}},
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{`echo "1\n233" | from-lines`, strs("1", "233"), nomore},
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{"put [a] [b c] | unpack", strs("a", "b", "c"), nomore},
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{`echo '{"k": "v", "a": [1, 2]}' '"foo"' | from-json`, []Value{
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NewMap(map[Value]Value{
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String("k"): String("v"),
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String("a"): NewList(strs("1", "2")...)}),
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String("foo"),
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}, nomore},
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{"base 16 42 233", strs("2a", "e9"), nomore},
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}
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func strs(ss ...string) []Value {
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vs := make([]Value, len(ss))
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for i, s := range ss {
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vs[i] = String(s)
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}
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return vs
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}
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func bools(bs ...bool) []Value {
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vs := make([]Value, len(bs))
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for i, b := range bs {
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vs[i] = Bool(b)
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}
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return vs
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}
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func mustParse(t *testing.T, name, text string) *parse.Chunk {
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n, err := parse.Parse(text)
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if err != nil {
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t.Fatalf("Parser(%q) error: %s", text, err)
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}
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return n
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}
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func evalAndCollect(t *testing.T, texts []string, chsize int) ([]Value, []byte, error) {
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name := "<eval test>"
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ev := NewEvaler(nil)
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// Collect byte output
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outBytes := []byte{}
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pr, pw, _ := os.Pipe()
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bytesDone := make(chan struct{})
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go func() {
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for {
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var buf [64]byte
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nr, err := pr.Read(buf[:])
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outBytes = append(outBytes, buf[:nr]...)
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if err != nil {
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break
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}
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}
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close(bytesDone)
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}()
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// Channel output
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outs := []Value{}
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// Exit. Only the exit of the last text is saved.
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var ex error
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for _, text := range texts {
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n := mustParse(t, name, text)
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outCh := make(chan Value, chsize)
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outDone := make(chan struct{})
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go func() {
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for v := range outCh {
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outs = append(outs, v)
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}
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close(outDone)
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}()
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ports := []*Port{
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{File: os.Stdin},
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{File: pw, Chan: outCh},
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{File: os.Stderr},
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}
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ex = ev.Eval(name, text, n, ports)
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close(outCh)
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<-outDone
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}
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pw.Close()
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<-bytesDone
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return outs, outBytes, ex
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}
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func TestEval(t *testing.T) {
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for _, tt := range evalTests {
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// fmt.Printf("eval %q\n", tt.text)
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out, bytesOut, err := evalAndCollect(t, []string{tt.text}, len(tt.wantOut))
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good := true
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errorf := func(format string, args ...interface{}) {
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if good {
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good = false
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t.Errorf("eval(%q) fails:", tt.text)
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}
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t.Errorf(format, args...)
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}
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if string(bytesOut) != string(tt.wantBytesOut) {
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errorf("got bytesOut=%q, want %q", bytesOut, tt.wantBytesOut)
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}
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// Check error. We accept errAny as a "wildcard" for all non-nil errors.
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if !(tt.wantError == errAny && err != nil) && !reflect.DeepEqual(tt.wantError, err) {
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errorf("got err=%v, want %v", err, tt.wantError)
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}
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if !reflect.DeepEqual(tt.wantOut, out) {
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errorf("got out=%v, want %v", out, tt.wantOut)
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}
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if !good {
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t.Errorf("--------------")
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}
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}
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}
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func TestMultipleEval(t *testing.T) {
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texts := []string{"x=hello", "put $x"}
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outs, _, err := evalAndCollect(t, texts, 1)
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wanted := strs("hello")
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if err != nil {
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t.Errorf("eval %s => %v, want nil", texts, err)
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}
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if !reflect.DeepEqual(outs, wanted) {
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t.Errorf("eval %s outputs %v, want %v", texts, outs, wanted)
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}
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}
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