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package scanner_test
import (
"log"
"strings"
"testing"
"github.com/mvertes/parscan/lang/golang"
"github.com/mvertes/parscan/scanner"
)
var GoScanner *scanner.Scanner
func init() {
log.SetFlags(log.Lshortfile)
GoScanner = scanner.NewScanner(golang.GoSpec)
}
func TestScan(t *testing.T) {
for _, test := range tests {
test := test
t.Run("", func(t *testing.T) {
errStr := ""
tokens, err := GoScanner.Scan(test.src, true)
if err != nil {
errStr = err.Error()
}
if errStr != test.err {
t.Errorf("got error %v, want error %#v", errStr, test.err)
}
if result := tokStr(tokens); result != test.tok {
t.Errorf("got %v, want %v", result, test.tok)
}
})
}
}
func tokStr(tokens []scanner.Token) (s string) {
var sb strings.Builder
for _, t := range tokens {
sb.WriteString(t.String() + " ")
}
s += sb.String()
return s
}
var tests = []struct {
src, tok, err string
}{{ // #00
src: "",
}, { // #01
src: " abc + 5",
tok: `Ident"abc" Add Int"5" Semicolon `,
}, { // #02
src: "abc0+5 ",
tok: `Ident"abc0" Add Int"5" Semicolon `,
}, { // #03
src: "a+5\na=x-4",
tok: `Ident"a" Add Int"5" Semicolon Ident"a" Assign Ident"x" Sub Int"4" Semicolon `,
}, { // #04
src: `return "hello world" + 4`,
tok: `Return String"\"hello world\"" Add Int"4" Semicolon `,
}, { // #05
src: `print(4 * (3+7))`,
tok: `Ident"print" ParenBlock"(4 * (3+7))" Semicolon `,
}, { // #06
src: `"foo`,
err: "1:1: block not terminated",
}, { // #07
src: `abc
def "foo truc`,
err: "2:6: block not terminated",
}, { // #08
src: `"ab\"`,
err: "1:1: block not terminated",
}, { // #09
src: `"ab\\"`,
tok: `String"\"ab\\\\\"" Semicolon `,
}, { // #10
src: `"ab\\\"`,
err: "1:1: block not terminated",
}, { // #11
src: `"ab\\\\"`,
tok: `String"\"ab\\\\\\\\\"" Semicolon `,
}, { // #12
src: `"abc
def"`,
err: "1:1: block not terminated",
}, { // #13
src: "`hello\nworld`",
tok: "String\"`hello\\nworld`\" Semicolon ",
}, { // #14
src: "2* (3+4",
err: "1:4: block not terminated",
}, { // #15
src: `("fo)o")+1`,
tok: `ParenBlock"(\"fo)o\")" Add Int"1" Semicolon `,
}, { // #16
src: `"foo""bar"`,
tok: `String"\"foo\"" String"\"bar\"" Semicolon `,
}, { // #17
src: "/* a comment */ a = 2",
tok: `Comment"/* a comment */" Ident"a" Assign Int"2" Semicolon `,
}, { // #18
src: "return // quit\nbegin",
tok: `Return Comment"// quit" Semicolon Ident"begin" Semicolon `,
}, { // #19
src: "return // quit",
tok: `Return Comment"// quit" Semicolon `,
}, { // #20
src: "println(3 /* argh ) */)",
tok: `Ident"println" ParenBlock"(3 /* argh ) */)" Semicolon `,
}, { // #21
src: `println("in f")`,
tok: `Ident"println" ParenBlock"(\"in f\")" Semicolon `,
}, { // #22
src: "a, b = 1, 2",
tok: `Ident"a" Comma Ident"b" Assign Int"1" Comma Int"2" Semicolon `,
}, { // #23
src: "1 + \n2 + 3",
tok: `Int"1" Add Int"2" Add Int"3" Semicolon `,
}, { // #24
src: "i++\n2 + 3",
tok: `Ident"i" Inc Semicolon Int"2" Add Int"3" Semicolon `,
}, { // #25
src: "return\na = 1",
tok: `Return Semicolon Ident"a" Assign Int"1" Semicolon `,
}, { // #26
src: "if\na == 2 { return }",
tok: `If Ident"a" Equal Int"2" BraceBlock"{ return }" Semicolon `,
}, { // #27
src: "f(4)\nreturn",
tok: `Ident"f" ParenBlock"(4)" Semicolon Return Semicolon `,
}, { // #28
src: "f(3).\nfield",
tok: `Ident"f" ParenBlock"(3)" Period"." Ident"field" Semicolon `,
}, { // #29
src: "\n\n\tif i < 1 {return 0}",
tok: `If Ident"i" Less Int"1" BraceBlock"{return 0}" Semicolon `,
}}
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