drone-matrix/vendor/github.com/aymerick/raymond/lexer/lexer_test.go

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2018-01-08 08:54:13 +00:00
package lexer
import (
"fmt"
"testing"
)
type lexTest struct {
name string
input string
tokens []Token
}
// helpers
func tokContent(val string) Token { return Token{TokenContent, val, 0, 1} }
func tokID(val string) Token { return Token{TokenID, val, 0, 1} }
func tokSep(val string) Token { return Token{TokenSep, val, 0, 1} }
func tokString(val string) Token { return Token{TokenString, val, 0, 1} }
func tokNumber(val string) Token { return Token{TokenNumber, val, 0, 1} }
func tokInverse(val string) Token { return Token{TokenInverse, val, 0, 1} }
func tokBool(val string) Token { return Token{TokenBoolean, val, 0, 1} }
func tokError(val string) Token { return Token{TokenError, val, 0, 1} }
func tokComment(val string) Token { return Token{TokenComment, val, 0, 1} }
var tokEOF = Token{TokenEOF, "", 0, 1}
var tokEquals = Token{TokenEquals, "=", 0, 1}
var tokData = Token{TokenData, "@", 0, 1}
var tokOpen = Token{TokenOpen, "{{", 0, 1}
var tokOpenAmp = Token{TokenOpen, "{{&", 0, 1}
var tokOpenPartial = Token{TokenOpenPartial, "{{>", 0, 1}
var tokClose = Token{TokenClose, "}}", 0, 1}
var tokOpenStrip = Token{TokenOpen, "{{~", 0, 1}
var tokCloseStrip = Token{TokenClose, "~}}", 0, 1}
var tokOpenUnescaped = Token{TokenOpenUnescaped, "{{{", 0, 1}
var tokCloseUnescaped = Token{TokenCloseUnescaped, "}}}", 0, 1}
var tokOpenUnescapedStrip = Token{TokenOpenUnescaped, "{{~{", 0, 1}
var tokCloseUnescapedStrip = Token{TokenCloseUnescaped, "}~}}", 0, 1}
var tokOpenBlock = Token{TokenOpenBlock, "{{#", 0, 1}
var tokOpenEndBlock = Token{TokenOpenEndBlock, "{{/", 0, 1}
var tokOpenInverse = Token{TokenOpenInverse, "{{^", 0, 1}
var tokOpenInverseChain = Token{TokenOpenInverseChain, "{{else", 0, 1}
var tokOpenSexpr = Token{TokenOpenSexpr, "(", 0, 1}
var tokCloseSexpr = Token{TokenCloseSexpr, ")", 0, 1}
var tokOpenBlockParams = Token{TokenOpenBlockParams, "as |", 0, 1}
var tokCloseBlockParams = Token{TokenCloseBlockParams, "|", 0, 1}
var tokOpenRawBlock = Token{TokenOpenRawBlock, "{{{{", 0, 1}
var tokCloseRawBlock = Token{TokenCloseRawBlock, "}}}}", 0, 1}
var tokOpenEndRawBlock = Token{TokenOpenEndRawBlock, "{{{{/", 0, 1}
var lexTests = []lexTest{
{"empty", "", []Token{tokEOF}},
{"spaces", " \t\n", []Token{tokContent(" \t\n"), tokEOF}},
{"content", `now is the time`, []Token{tokContent(`now is the time`), tokEOF}},
{
`does not tokenizes identifier starting with true as boolean`,
`{{ foo truebar }}`,
[]Token{tokOpen, tokID("foo"), tokID("truebar"), tokClose, tokEOF},
},
{
`does not tokenizes identifier starting with false as boolean`,
`{{ foo falsebar }}`,
[]Token{tokOpen, tokID("foo"), tokID("falsebar"), tokClose, tokEOF},
},
{
`tokenizes raw block`,
`{{{{foo}}}} {{{{/foo}}}}`,
[]Token{tokOpenRawBlock, tokID("foo"), tokCloseRawBlock, tokContent(" "), tokOpenEndRawBlock, tokID("foo"), tokCloseRawBlock, tokEOF},
},
{
`tokenizes raw block with mustaches in content`,
`{{{{foo}}}}{{bar}}{{{{/foo}}}}`,
[]Token{tokOpenRawBlock, tokID("foo"), tokCloseRawBlock, tokContent("{{bar}}"), tokOpenEndRawBlock, tokID("foo"), tokCloseRawBlock, tokEOF},
},
{
`tokenizes @../foo`,
`{{@../foo}}`,
[]Token{tokOpen, tokData, tokID(".."), tokSep("/"), tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes escaped mustaches`,
"\\{{bar}}",
[]Token{tokContent("{{bar}}"), tokEOF},
},
{
`tokenizes strip mustaches`,
`{{~ foo ~}}`,
[]Token{tokOpenStrip, tokID("foo"), tokCloseStrip, tokEOF},
},
{
`tokenizes unescaped strip mustaches`,
`{{~{ foo }~}}`,
[]Token{tokOpenUnescapedStrip, tokID("foo"), tokCloseUnescapedStrip, tokEOF},
},
//
// Next tests come from:
// https://github.com/wycats/handlebars.js/blob/master/spec/tokenizer.js
//
{
`tokenizes a simple mustache as "OPEN ID CLOSE"`,
`{{foo}}`,
[]Token{tokOpen, tokID("foo"), tokClose, tokEOF},
},
{
`supports unescaping with &`,
`{{&bar}}`,
[]Token{tokOpenAmp, tokID("bar"), tokClose, tokEOF},
},
{
`supports unescaping with {{{`,
`{{{bar}}}`,
[]Token{tokOpenUnescaped, tokID("bar"), tokCloseUnescaped, tokEOF},
},
{
`supports escaping delimiters`,
"{{foo}} \\{{bar}} {{baz}}",
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" "), tokContent("{{bar}} "), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`supports escaping multiple delimiters`,
"{{foo}} \\{{bar}} \\{{baz}}",
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" "), tokContent("{{bar}} "), tokContent("{{baz}}"), tokEOF},
},
{
`supports escaping a triple stash`,
"{{foo}} \\{{{bar}}} {{baz}}",
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" "), tokContent("{{{bar}}} "), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`supports escaping escape character`,
"{{foo}} \\\\{{bar}} {{baz}}",
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" \\"), tokOpen, tokID("bar"), tokClose, tokContent(" "), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`supports escaping multiple escape characters`,
"{{foo}} \\\\{{bar}} \\\\{{baz}}",
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" \\"), tokOpen, tokID("bar"), tokClose, tokContent(" \\"), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`supports escaped mustaches after escaped escape characters`,
"{{foo}} \\\\{{bar}} \\{{baz}}",
// NOTE: JS implementation returns:
// ['OPEN', 'ID', 'CLOSE', 'CONTENT', 'OPEN', 'ID', 'CLOSE', 'CONTENT', 'CONTENT', 'CONTENT'],
// WTF is the last CONTENT ?
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" \\"), tokOpen, tokID("bar"), tokClose, tokContent(" "), tokContent("{{baz}}"), tokEOF},
},
{
`supports escaped escape characters after escaped mustaches`,
"{{foo}} \\{{bar}} \\\\{{baz}}",
// NOTE: JS implementation returns:
// []Token{tokOpen, tokID("foo"), tokClose, tokContent(" "), tokContent("{{bar}} "), tokContent("\\"), tokOpen, tokID("baz"), tokClose, tokEOF},
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" "), tokContent("{{bar}} \\"), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`supports escaped escape character on a triple stash`,
"{{foo}} \\\\{{{bar}}} {{baz}}",
[]Token{tokOpen, tokID("foo"), tokClose, tokContent(" \\"), tokOpenUnescaped, tokID("bar"), tokCloseUnescaped, tokContent(" "), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`tokenizes a simple path`,
`{{foo/bar}}`,
[]Token{tokOpen, tokID("foo"), tokSep("/"), tokID("bar"), tokClose, tokEOF},
},
{
`allows dot notation (1)`,
`{{foo.bar}}`,
[]Token{tokOpen, tokID("foo"), tokSep("."), tokID("bar"), tokClose, tokEOF},
},
{
`allows dot notation (2)`,
`{{foo.bar.baz}}`,
[]Token{tokOpen, tokID("foo"), tokSep("."), tokID("bar"), tokSep("."), tokID("baz"), tokClose, tokEOF},
},
{
`allows path literals with []`,
`{{foo.[bar]}}`,
[]Token{tokOpen, tokID("foo"), tokSep("."), tokID("[bar]"), tokClose, tokEOF},
},
{
`allows multiple path literals on a line with []`,
`{{foo.[bar]}}{{foo.[baz]}}`,
[]Token{tokOpen, tokID("foo"), tokSep("."), tokID("[bar]"), tokClose, tokOpen, tokID("foo"), tokSep("."), tokID("[baz]"), tokClose, tokEOF},
},
{
`tokenizes {{.}} as OPEN ID CLOSE`,
`{{.}}`,
[]Token{tokOpen, tokID("."), tokClose, tokEOF},
},
{
`tokenizes a path as "OPEN (ID SEP)* ID CLOSE"`,
`{{../foo/bar}}`,
[]Token{tokOpen, tokID(".."), tokSep("/"), tokID("foo"), tokSep("/"), tokID("bar"), tokClose, tokEOF},
},
{
`tokenizes a path with .. as a parent path`,
`{{../foo.bar}}`,
[]Token{tokOpen, tokID(".."), tokSep("/"), tokID("foo"), tokSep("."), tokID("bar"), tokClose, tokEOF},
},
{
`tokenizes a path with this/foo as OPEN ID SEP ID CLOSE`,
`{{this/foo}}`,
[]Token{tokOpen, tokID("this"), tokSep("/"), tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes a simple mustache with spaces as "OPEN ID CLOSE"`,
`{{ foo }}`,
[]Token{tokOpen, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes a simple mustache with line breaks as "OPEN ID ID CLOSE"`,
"{{ foo \n bar }}",
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokClose, tokEOF},
},
{
`tokenizes raw content as "CONTENT"`,
`foo {{ bar }} baz`,
[]Token{tokContent("foo "), tokOpen, tokID("bar"), tokClose, tokContent(" baz"), tokEOF},
},
{
`tokenizes a partial as "OPEN_PARTIAL ID CLOSE"`,
`{{> foo}}`,
[]Token{tokOpenPartial, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes a partial with context as "OPEN_PARTIAL ID ID CLOSE"`,
`{{> foo bar }}`,
[]Token{tokOpenPartial, tokID("foo"), tokID("bar"), tokClose, tokEOF},
},
{
`tokenizes a partial without spaces as "OPEN_PARTIAL ID CLOSE"`,
`{{>foo}}`,
[]Token{tokOpenPartial, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes a partial space at the }); as "OPEN_PARTIAL ID CLOSE"`,
`{{>foo }}`,
[]Token{tokOpenPartial, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes a partial space at the }); as "OPEN_PARTIAL ID CLOSE"`,
`{{>foo/bar.baz }}`,
[]Token{tokOpenPartial, tokID("foo"), tokSep("/"), tokID("bar"), tokSep("."), tokID("baz"), tokClose, tokEOF},
},
{
`tokenizes a comment as "COMMENT"`,
`foo {{! this is a comment }} bar {{ baz }}`,
[]Token{tokContent("foo "), tokComment("{{! this is a comment }}"), tokContent(" bar "), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`tokenizes a block comment as "COMMENT"`,
`foo {{!-- this is a {{comment}} --}} bar {{ baz }}`,
[]Token{tokContent("foo "), tokComment("{{!-- this is a {{comment}} --}}"), tokContent(" bar "), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`tokenizes a block comment with whitespace as "COMMENT"`,
"foo {{!-- this is a\n{{comment}}\n--}} bar {{ baz }}",
[]Token{tokContent("foo "), tokComment("{{!-- this is a\n{{comment}}\n--}}"), tokContent(" bar "), tokOpen, tokID("baz"), tokClose, tokEOF},
},
{
`tokenizes open and closing blocks as OPEN_BLOCK, ID, CLOSE ..., OPEN_ENDBLOCK ID CLOSE`,
`{{#foo}}content{{/foo}}`,
[]Token{tokOpenBlock, tokID("foo"), tokClose, tokContent("content"), tokOpenEndBlock, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes inverse sections as "INVERSE"`,
`{{^}}`,
[]Token{tokInverse("{{^}}"), tokEOF},
},
{
`tokenizes inverse sections as "INVERSE" with alternate format`,
`{{else}}`,
[]Token{tokInverse("{{else}}"), tokEOF},
},
{
`tokenizes inverse sections as "INVERSE" with spaces`,
`{{ else }}`,
[]Token{tokInverse("{{ else }}"), tokEOF},
},
{
`tokenizes inverse sections with ID as "OPEN_INVERSE ID CLOSE"`,
`{{^foo}}`,
[]Token{tokOpenInverse, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes inverse sections with ID and spaces as "OPEN_INVERSE ID CLOSE"`,
`{{^ foo }}`,
[]Token{tokOpenInverse, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes mustaches with params as "OPEN ID ID ID CLOSE"`,
`{{ foo bar baz }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokClose, tokEOF},
},
{
`tokenizes mustaches with String params as "OPEN ID ID STRING CLOSE"`,
`{{ foo bar "baz" }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokString("baz"), tokClose, tokEOF},
},
{
`tokenizes mustaches with String params using single quotes as "OPEN ID ID STRING CLOSE"`,
`{{ foo bar 'baz' }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokString("baz"), tokClose, tokEOF},
},
{
`tokenizes String params with spaces inside as "STRING"`,
`{{ foo bar "baz bat" }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokString("baz bat"), tokClose, tokEOF},
},
{
`tokenizes String params with escapes quotes as STRING`,
`{{ foo "bar\"baz" }}`,
[]Token{tokOpen, tokID("foo"), tokString(`bar"baz`), tokClose, tokEOF},
},
{
`tokenizes String params using single quotes with escapes quotes as STRING`,
`{{ foo 'bar\'baz' }}`,
[]Token{tokOpen, tokID("foo"), tokString(`bar'baz`), tokClose, tokEOF},
},
{
`tokenizes numbers`,
`{{ foo 1 }}`,
[]Token{tokOpen, tokID("foo"), tokNumber("1"), tokClose, tokEOF},
},
{
`tokenizes floats`,
`{{ foo 1.1 }}`,
[]Token{tokOpen, tokID("foo"), tokNumber("1.1"), tokClose, tokEOF},
},
{
`tokenizes negative numbers`,
`{{ foo -1 }}`,
[]Token{tokOpen, tokID("foo"), tokNumber("-1"), tokClose, tokEOF},
},
{
`tokenizes negative floats`,
`{{ foo -1.1 }}`,
[]Token{tokOpen, tokID("foo"), tokNumber("-1.1"), tokClose, tokEOF},
},
{
`tokenizes boolean true`,
`{{ foo true }}`,
[]Token{tokOpen, tokID("foo"), tokBool("true"), tokClose, tokEOF},
},
{
`tokenizes boolean false`,
`{{ foo false }}`,
[]Token{tokOpen, tokID("foo"), tokBool("false"), tokClose, tokEOF},
},
// SKIP: 'tokenizes undefined and null'
{
`tokenizes hash arguments (1)`,
`{{ foo bar=baz }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokEquals, tokID("baz"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (2)`,
`{{ foo bar baz=bat }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokEquals, tokID("bat"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (3)`,
`{{ foo bar baz=1 }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokEquals, tokNumber("1"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (4)`,
`{{ foo bar baz=true }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokEquals, tokBool("true"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (5)`,
`{{ foo bar baz=false }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokEquals, tokBool("false"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (6)`,
"{{ foo bar\n baz=bat }}",
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokEquals, tokID("bat"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (7)`,
`{{ foo bar baz="bat" }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokEquals, tokString("bat"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (8)`,
`{{ foo bar baz="bat" bam=wot }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokID("baz"), tokEquals, tokString("bat"), tokID("bam"), tokEquals, tokID("wot"), tokClose, tokEOF},
},
{
`tokenizes hash arguments (9)`,
`{{foo omg bar=baz bat="bam"}}`,
[]Token{tokOpen, tokID("foo"), tokID("omg"), tokID("bar"), tokEquals, tokID("baz"), tokID("bat"), tokEquals, tokString("bam"), tokClose, tokEOF},
},
{
`tokenizes special @ identifiers (1)`,
`{{ @foo }}`,
[]Token{tokOpen, tokData, tokID("foo"), tokClose, tokEOF},
},
{
`tokenizes special @ identifiers (2)`,
`{{ foo @bar }}`,
[]Token{tokOpen, tokID("foo"), tokData, tokID("bar"), tokClose, tokEOF},
},
{
`tokenizes special @ identifiers (3)`,
`{{ foo bar=@baz }}`,
[]Token{tokOpen, tokID("foo"), tokID("bar"), tokEquals, tokData, tokID("baz"), tokClose, tokEOF},
},
{
`does not time out in a mustache with a single } followed by EOF`,
`{{foo}`,
[]Token{tokOpen, tokID("foo"), tokError("Unexpected character in expression: '}'")},
},
{
`does not time out in a mustache when invalid ID characters are used`,
`{{foo & }}`,
[]Token{tokOpen, tokID("foo"), tokError("Unexpected character in expression: '&'")},
},
{
`tokenizes subexpressions (1)`,
`{{foo (bar)}}`,
[]Token{tokOpen, tokID("foo"), tokOpenSexpr, tokID("bar"), tokCloseSexpr, tokClose, tokEOF},
},
{
`tokenizes subexpressions (2)`,
`{{foo (a-x b-y)}}`,
[]Token{tokOpen, tokID("foo"), tokOpenSexpr, tokID("a-x"), tokID("b-y"), tokCloseSexpr, tokClose, tokEOF},
},
{
`tokenizes nested subexpressions`,
`{{foo (bar (lol rofl)) (baz)}}`,
[]Token{tokOpen, tokID("foo"), tokOpenSexpr, tokID("bar"), tokOpenSexpr, tokID("lol"), tokID("rofl"), tokCloseSexpr, tokCloseSexpr, tokOpenSexpr, tokID("baz"), tokCloseSexpr, tokClose, tokEOF},
},
{
`tokenizes nested subexpressions: literals`,
`{{foo (bar (lol true) false) (baz 1) (blah 'b') (blorg "c")}}`,
[]Token{tokOpen, tokID("foo"), tokOpenSexpr, tokID("bar"), tokOpenSexpr, tokID("lol"), tokBool("true"), tokCloseSexpr, tokBool("false"), tokCloseSexpr, tokOpenSexpr, tokID("baz"), tokNumber("1"), tokCloseSexpr, tokOpenSexpr, tokID("blah"), tokString("b"), tokCloseSexpr, tokOpenSexpr, tokID("blorg"), tokString("c"), tokCloseSexpr, tokClose, tokEOF},
},
{
`tokenizes block params (1)`,
`{{#foo as |bar|}}`,
[]Token{tokOpenBlock, tokID("foo"), tokOpenBlockParams, tokID("bar"), tokCloseBlockParams, tokClose, tokEOF},
},
{
`tokenizes block params (2)`,
`{{#foo as |bar baz|}}`,
[]Token{tokOpenBlock, tokID("foo"), tokOpenBlockParams, tokID("bar"), tokID("baz"), tokCloseBlockParams, tokClose, tokEOF},
},
{
`tokenizes block params (3)`,
`{{#foo as | bar baz |}}`,
[]Token{tokOpenBlock, tokID("foo"), tokOpenBlockParams, tokID("bar"), tokID("baz"), tokCloseBlockParams, tokClose, tokEOF},
},
{
`tokenizes block params (4)`,
`{{#foo as as | bar baz |}}`,
[]Token{tokOpenBlock, tokID("foo"), tokID("as"), tokOpenBlockParams, tokID("bar"), tokID("baz"), tokCloseBlockParams, tokClose, tokEOF},
},
{
`tokenizes block params (5)`,
`{{else foo as |bar baz|}}`,
[]Token{tokOpenInverseChain, tokID("foo"), tokOpenBlockParams, tokID("bar"), tokID("baz"), tokCloseBlockParams, tokClose, tokEOF},
},
}
func collect(t *lexTest) []Token {
var result []Token
l := scanWithName(t.input, t.name)
for {
token := l.NextToken()
result = append(result, token)
if token.Kind == TokenEOF || token.Kind == TokenError {
break
}
}
return result
}
func equal(i1, i2 []Token, checkPos bool) bool {
if len(i1) != len(i2) {
return false
}
for k := range i1 {
if i1[k].Kind != i2[k].Kind {
return false
}
if checkPos && i1[k].Pos != i2[k].Pos {
return false
}
if i1[k].Val != i2[k].Val {
return false
}
}
return true
}
func TestLexer(t *testing.T) {
t.Parallel()
for _, test := range lexTests {
tokens := collect(&test)
if !equal(tokens, test.tokens, false) {
t.Errorf("Test '%s' failed\ninput:\n\t'%s'\nexpected\n\t%v\ngot\n\t%+v\n", test.name, test.input, test.tokens, tokens)
}
}
}
// @todo Test errors:
// `{{{{raw foo`
// package example
func Example() {
source := "You know {{nothing}} John Snow"
output := ""
lex := Scan(source)
for {
// consume next token
token := lex.NextToken()
output += fmt.Sprintf(" %s", token)
// stops when all tokens have been consumed, or on error
if token.Kind == TokenEOF || token.Kind == TokenError {
break
}
}
fmt.Print(output)
// Output: Content{"You know "} Open{"{{"} ID{"nothing"} Close{"}}"} Content{" John Snow"} EOF
}