mirror of
https://github.com/go-sylixos/elvish.git
synced 2024-12-13 09:57:51 +08:00
286 lines
8.5 KiB
Go
286 lines
8.5 KiB
Go
package parse
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import (
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"fmt"
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"os"
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"testing"
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)
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func a(c ...interface{}) ast {
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// Shorthand used for checking Compound and levels beneath.
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return ast{"Chunk/Pipeline/Form", fs{"Head": "a", "Args": c}}
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}
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var goodCases = []struct {
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src string
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ast ast
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}{
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// Chunk
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// Smoke test.
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{"a;b;c\n;d", ast{"Chunk", fs{"Pipelines": []string{"a", "b", "c", "d"}}}},
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// Empty chunk should have Pipelines=nil.
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{"", ast{"Chunk", fs{"Pipelines": nil}}},
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// Superfluous newlines and semicolons should not result in empty
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// pipelines.
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{" ;\n\n ls \t ;\n", ast{"Chunk", fs{"Pipelines": []string{"ls \t "}}}},
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// Pipeline
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{"a|b|c|d", ast{
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"Chunk/Pipeline", fs{"Forms": []string{"a", "b", "c", "d"}}}},
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// Newlines are allowed after pipes.
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{"a| \n \n b", ast{
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"Chunk/Pipeline", fs{"Forms": []string{"a", "b"}}}},
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// Comments.
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{"a#haha\nb#lala", ast{
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"Chunk", fs{"Pipelines": []string{"a", "b"}}}},
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// Form
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// Smoke test.
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{"ls x y", ast{"Chunk/Pipeline/Form", fs{
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"Head": "ls",
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"Args": []string{"x", "y"}}}},
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// Assignments.
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{"k=v k[a][b]=v {a,b[1]}=(ha)", ast{"Chunk/Pipeline/Form", fs{
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"Assignments": []string{"k=v", "k[a][b]=v", "{a,b[1]}=(ha)"}}}},
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// Temporary assignment.
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{"k=v k[a][b]=v a", ast{"Chunk/Pipeline/Form", fs{
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"Assignments": []string{"k=v", "k[a][b]=v"},
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"Head": "a"}}},
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// Spacey assignment.
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{"k=v a b = c d", ast{"Chunk/Pipeline/Form", fs{
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"Assignments": []string{"k=v"},
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"Vars": []string{"a", "b"},
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"Args": []string{"c", "d"}}}},
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// Redirections
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{"a >b", ast{"Chunk/Pipeline/Form", fs{
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"Head": "a",
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"Redirs": []ast{
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{"Redir", fs{"Mode": Write, "Right": "b"}}},
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}}},
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// More redirections
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{"a >>b 2>b 3>&- 4>&1 5<c 6<>d", ast{"Chunk/Pipeline/Form", fs{
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"Head": "a",
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"Redirs": []ast{
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{"Redir", fs{"Mode": Append, "Right": "b"}},
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{"Redir", fs{"Left": "2", "Mode": Write, "Right": "b"}},
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{"Redir", fs{"Left": "3", "Mode": Write, "RightIsFd": true, "Right": "-"}},
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{"Redir", fs{"Left": "4", "Mode": Write, "RightIsFd": true, "Right": "1"}},
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{"Redir", fs{"Left": "5", "Mode": Read, "Right": "c"}},
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{"Redir", fs{"Left": "6", "Mode": ReadWrite, "Right": "d"}},
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},
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}}},
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// Exitus redirection
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{"a ?>$e", ast{"Chunk/Pipeline/Form", fs{
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"Head": "a",
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"ExitusRedir": ast{"ExitusRedir", fs{"Dest": "$e"}},
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}}},
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// Options (structure of MapPair tested below with map)
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{"a &a=1 x &b=2", ast{"Chunk/Pipeline/Form", fs{
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"Head": "a",
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"Args": []string{"x"},
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"Opts": []string{"&a=1", "&b=2"},
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}}},
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// Compound
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{`a b"foo"?$c*'xyz'`, a(ast{"Compound", fs{
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"Indexings": []string{"b", `"foo"`, "?", "$c", "*", "'xyz'"}}})},
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// Indexing
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{"a $b[c][d][\ne\n]", a(ast{"Compound/Indexing", fs{
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"Head": "$b", "Indicies": []string{"c", "d", "\ne\n"},
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}})},
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// Primary
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//
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// Single quote
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{"a '''x''y'''", a(ast{"Compound/Indexing/Primary", fs{
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"Type": SingleQuoted, "Value": "'x'y'",
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}})},
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// Double quote
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{`a "b\^[\x1b\u548c\U0002CE23\123\n\t\\"`,
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a(ast{"Compound/Indexing/Primary", fs{
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"Type": DoubleQuoted,
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"Value": "b\x1b\x1b\u548c\U0002CE23\123\n\t\\",
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}})},
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// Wildcard
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{"a * ?", a(
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ast{"Compound/Indexing/Primary", fs{"Type": Wildcard, "Value": "*"}},
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ast{"Compound/Indexing/Primary", fs{"Type": Wildcard, "Value": "?"}},
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)},
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// Variable
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{"a $x $&f", a(
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ast{"Compound/Indexing/Primary", fs{"Type": Variable, "Value": "x"}},
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ast{"Compound/Indexing/Primary", fs{"Type": Variable, "Value": "&f"}},
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)},
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// List
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{"a [] [ ] [1] [ 2] [3 ] [\n 4 \n5\n 6 7 \n]", a(
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ast{"Compound/Indexing/Primary", fs{
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"Type": List,
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"Elements": []ast{}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": List,
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"Elements": []ast{}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": List,
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"Elements": []string{"1"}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": List,
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"Elements": []string{"2"}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": List,
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"Elements": []string{"3"}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": List,
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"Elements": []string{"4", "5", "6", "7"}}},
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)},
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// Map
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{"a [&k=v] [ &k=v] [&k=v ] [ &k=v ] [ &k= v] [&k= \n v] [\n&a=b &c=d \n &e=f\n\n]", a(
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ast{"Compound/Indexing/Primary", fs{
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"Type": Map,
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"MapPairs": []ast{{"MapPair", fs{"Key": "k", "Value": "v"}}}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Map,
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"MapPairs": []ast{{"MapPair", fs{"Key": "k", "Value": "v"}}}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Map,
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"MapPairs": []ast{{"MapPair", fs{"Key": "k", "Value": "v"}}}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Map,
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"MapPairs": []ast{{"MapPair", fs{"Key": "k", "Value": "v"}}}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Map,
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"MapPairs": []ast{{"MapPair", fs{"Key": "k", "Value": "v"}}}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Map,
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"MapPairs": []ast{{"MapPair", fs{"Key": "k", "Value": "v"}}}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Map,
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"MapPairs": []ast{
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{"MapPair", fs{"Key": "a", "Value": "b"}},
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{"MapPair", fs{"Key": "c", "Value": "d"}},
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{"MapPair", fs{"Key": "e", "Value": "f"}},
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}}},
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)},
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// Empty map
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{"a [&] [ &] [& ] [ & ]", a(
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ast{"Compound/Indexing/Primary", fs{"Type": Map, "MapPairs": nil}},
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ast{"Compound/Indexing/Primary", fs{"Type": Map, "MapPairs": nil}},
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ast{"Compound/Indexing/Primary", fs{"Type": Map, "MapPairs": nil}},
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ast{"Compound/Indexing/Primary", fs{"Type": Map, "MapPairs": nil}},
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)},
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// Lambda
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{"a []{} [ ]{ } []{ echo 233 } [ x y ]{puts $x $y} { put haha}", a(
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ast{"Compound/Indexing/Primary", fs{
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"Type": Lambda, "Elements": []ast{}, "Chunk": "",
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}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Lambda, "Elements": []ast{}, "Chunk": " ",
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}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Lambda, "Elements": []ast{}, "Chunk": " echo 233 ",
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}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Lambda, "Elements": []string{"x", "y"}, "Chunk": "puts $x $y",
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}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": Lambda, "Elements": []ast{}, "Chunk": " put haha",
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}},
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)},
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// Lambda with arguments and options
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{"a [a b &k=v]{}", a(
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ast{"Compound/Indexing/Primary", fs{
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"Type": Lambda,
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"Elements": []string{"a", "b"},
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"MapPairs": []string{"&k=v"},
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"Chunk": "",
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}},
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)},
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// Output capture
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{"a () (b;c) (c\nd)", a(
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ast{"Compound/Indexing/Primary", fs{
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"Type": OutputCapture, "Chunk": ""}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": OutputCapture, "Chunk": ast{
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"Chunk", fs{"Pipelines": []string{"b", "c"}},
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}}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": OutputCapture, "Chunk": ast{
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"Chunk", fs{"Pipelines": []string{"c", "d"}},
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}}},
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)},
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// Exitus capture
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{"a ?() ?(b;c)", a(
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ast{"Compound/Indexing/Primary", fs{
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"Type": ExceptionCapture, "Chunk": ""}},
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ast{"Compound/Indexing/Primary", fs{
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"Type": ExceptionCapture, "Chunk": "b;c",
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}})},
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// Braced
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{"a {,a,c\ng\n}", a(
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ast{"Compound/Indexing/Primary", fs{
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"Type": Braced,
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"Braced": []string{"", "a", "c", "g", ""}}})},
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// Tilde
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{"a ~xiaq/go", a(
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ast{"Compound", fs{
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"Indexings": []ast{
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{"Indexing/Primary", fs{"Type": Tilde, "Value": "~"}},
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{"Indexing/Primary", fs{"Type": Bareword, "Value": "xiaq/go"}},
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},
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}},
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)},
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// Line continuation: "\\\n" is considered whitespace
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{"a b\\\nc", ast{
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"Chunk/Pipeline/Form", fs{"Head": "a", "Args": []string{"b", "c"}}}},
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}
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func TestParse(t *testing.T) {
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for _, tc := range goodCases {
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bn, err := AsChunk("[test]", tc.src)
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if err != nil {
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t.Errorf("Parse(%q) returns error: %v", tc.src, err)
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}
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err = checkParseTree(bn)
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if err != nil {
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t.Errorf("Parse(%q) returns bad parse tree: %v", tc.src, err)
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fmt.Fprintf(os.Stderr, "Parse tree of %q:\n", tc.src)
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PPrintParseTree(bn, os.Stderr)
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}
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err = checkAST(bn, tc.ast)
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if err != nil {
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t.Errorf("Parse(%q) returns bad AST: %v", tc.src, err)
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fmt.Fprintf(os.Stderr, "AST of %q:\n", tc.src)
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PPrintAST(bn, os.Stderr)
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}
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}
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}
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var badCases = []struct {
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src string
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pos int // expected Begin position of first error
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}{
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// Empty form.
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{"a|", 2},
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// Unopened parens.
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{")", 0}, {"]", 0}, {"}", 0},
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// Unclosed parens.
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{"a (", 3}, {"a [", 3}, {"a {", 3},
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// Bogus ampersand.
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{"a & &", 4}, {"a [&", 4},
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}
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func TestParseError(t *testing.T) {
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for _, tc := range badCases {
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_, err := AsChunk("[test]", tc.src)
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if err == nil {
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t.Errorf("Parse(%q) returns no error", tc.src)
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continue
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}
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posErr0 := err.(MultiError).Entries[0]
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if posErr0.Context.Begin != tc.pos {
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t.Errorf("Parse(%q) first error begins at %d, want %d. Errors are:%s\n", tc.src, posErr0.Context.Begin, tc.pos, err)
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}
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}
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}
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