341 lines
8.5 KiB
Go
341 lines
8.5 KiB
Go
package scanner
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import (
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"bytes"
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"fmt"
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"strings"
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"testing"
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"github.com/fatih/hcl/token"
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)
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var f100 = "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
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type tokenPair struct {
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tok token.Token
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text string
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}
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var tokenLists = map[string][]tokenPair{
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"comment": []tokenPair{
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{token.COMMENT, "//"},
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{token.COMMENT, "////"},
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{token.COMMENT, "// comment"},
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{token.COMMENT, "// /* comment */"},
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{token.COMMENT, "// // comment //"},
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{token.COMMENT, "//" + f100},
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{token.COMMENT, "#"},
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{token.COMMENT, "##"},
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{token.COMMENT, "# comment"},
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{token.COMMENT, "# /* comment */"},
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{token.COMMENT, "# # comment #"},
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{token.COMMENT, "#" + f100},
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{token.COMMENT, "/**/"},
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{token.COMMENT, "/***/"},
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{token.COMMENT, "/* comment */"},
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{token.COMMENT, "/* // comment */"},
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{token.COMMENT, "/* /* comment */"},
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{token.COMMENT, "/*\n comment\n*/"},
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{token.COMMENT, "/*" + f100 + "*/"},
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},
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"operator": []tokenPair{
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{token.LBRACK, "["},
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{token.LBRACE, "{"},
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{token.COMMA, ","},
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{token.PERIOD, "."},
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{token.RBRACK, "]"},
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{token.RBRACE, "}"},
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{token.ASSIGN, "="},
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{token.ADD, "+"},
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{token.SUB, "-"},
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},
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"bool": []tokenPair{
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{token.BOOL, "true"},
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{token.BOOL, "false"},
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},
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"ident": []tokenPair{
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{token.IDENT, "a"},
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{token.IDENT, "a0"},
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{token.IDENT, "foobar"},
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{token.IDENT, "abc123"},
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{token.IDENT, "LGTM"},
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{token.IDENT, "_"},
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{token.IDENT, "_abc123"},
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{token.IDENT, "abc123_"},
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{token.IDENT, "_abc_123_"},
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{token.IDENT, "_äöü"},
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{token.IDENT, "_本"},
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{token.IDENT, "äöü"},
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{token.IDENT, "本"},
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{token.IDENT, "a۰۱۸"},
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{token.IDENT, "foo६४"},
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{token.IDENT, "bar９８７６"},
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},
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"string": []tokenPair{
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{token.STRING, `" "`},
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{token.STRING, `"a"`},
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{token.STRING, `"本"`},
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{token.STRING, `"\a"`},
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{token.STRING, `"\b"`},
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{token.STRING, `"\f"`},
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{token.STRING, `"\n"`},
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{token.STRING, `"\r"`},
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{token.STRING, `"\t"`},
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{token.STRING, `"\v"`},
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{token.STRING, `"\""`},
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{token.STRING, `"\000"`},
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{token.STRING, `"\777"`},
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{token.STRING, `"\x00"`},
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{token.STRING, `"\xff"`},
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{token.STRING, `"\u0000"`},
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{token.STRING, `"\ufA16"`},
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{token.STRING, `"\U00000000"`},
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{token.STRING, `"\U0000ffAB"`},
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{token.STRING, `"` + f100 + `"`},
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},
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"number": []tokenPair{
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{token.NUMBER, "0"},
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{token.NUMBER, "1"},
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{token.NUMBER, "9"},
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{token.NUMBER, "42"},
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{token.NUMBER, "1234567890"},
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{token.NUMBER, "00"},
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{token.NUMBER, "01"},
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{token.NUMBER, "07"},
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{token.NUMBER, "042"},
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{token.NUMBER, "01234567"},
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{token.NUMBER, "0x0"},
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{token.NUMBER, "0x1"},
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{token.NUMBER, "0xf"},
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{token.NUMBER, "0x42"},
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{token.NUMBER, "0x123456789abcDEF"},
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{token.NUMBER, "0x" + f100},
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{token.NUMBER, "0X0"},
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{token.NUMBER, "0X1"},
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{token.NUMBER, "0XF"},
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{token.NUMBER, "0X42"},
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{token.NUMBER, "0X123456789abcDEF"},
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{token.NUMBER, "0X" + f100},
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{token.NUMBER, "0e0"},
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{token.NUMBER, "1e0"},
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{token.NUMBER, "42e0"},
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{token.NUMBER, "01234567890e0"},
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{token.NUMBER, "0E0"},
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{token.NUMBER, "1E0"},
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{token.NUMBER, "42E0"},
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{token.NUMBER, "01234567890E0"},
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{token.NUMBER, "0e+10"},
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{token.NUMBER, "1e-10"},
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{token.NUMBER, "42e+10"},
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{token.NUMBER, "01234567890e-10"},
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{token.NUMBER, "0E+10"},
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{token.NUMBER, "1E-10"},
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{token.NUMBER, "42E+10"},
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{token.NUMBER, "01234567890E-10"},
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},
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"float": []tokenPair{
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{token.FLOAT, "0."},
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{token.FLOAT, "1."},
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{token.FLOAT, "42."},
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{token.FLOAT, "01234567890."},
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{token.FLOAT, ".0"},
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{token.FLOAT, ".1"},
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{token.FLOAT, ".42"},
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{token.FLOAT, ".0123456789"},
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{token.FLOAT, "0.0"},
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{token.FLOAT, "1.0"},
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{token.FLOAT, "42.0"},
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{token.FLOAT, "01234567890.0"},
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{token.FLOAT, "01.8e0"},
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{token.FLOAT, "1.4e0"},
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{token.FLOAT, "42.2e0"},
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{token.FLOAT, "01234567890.12e0"},
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{token.FLOAT, "0.E0"},
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{token.FLOAT, "1.12E0"},
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{token.FLOAT, "42.123E0"},
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{token.FLOAT, "01234567890.213E0"},
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{token.FLOAT, "0.2e+10"},
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{token.FLOAT, "1.2e-10"},
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{token.FLOAT, "42.54e+10"},
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{token.FLOAT, "01234567890.98e-10"},
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{token.FLOAT, "0.1E+10"},
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{token.FLOAT, "1.1E-10"},
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{token.FLOAT, "42.1E+10"},
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{token.FLOAT, "01234567890.1E-10"},
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},
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}
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var orderedTokenLists = []string{
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"comment",
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"operator",
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"bool",
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"ident",
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"string",
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"number",
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"float",
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}
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func TestPosition(t *testing.T) {
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// create artifical source code
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buf := new(bytes.Buffer)
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for _, listName := range orderedTokenLists {
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for _, ident := range tokenLists[listName] {
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fmt.Fprintf(buf, "\t\t\t\t%s\n", ident.text)
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}
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}
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s, err := NewScanner(buf)
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if err != nil {
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t.Fatal(err)
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}
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pos := Position{"", 4, 1, 5}
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s.Scan()
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for _, listName := range orderedTokenLists {
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for _, k := range tokenLists[listName] {
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curPos := s.Pos()
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// fmt.Printf("[%q] s = %+v:%+v\n", k.text, curPos.Offset, curPos.Column)
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if curPos.Offset != pos.Offset {
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t.Fatalf("offset = %d, want %d for %q", curPos.Offset, pos.Offset, k.text)
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}
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if curPos.Line != pos.Line {
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t.Fatalf("line = %d, want %d for %q", curPos.Line, pos.Line, k.text)
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}
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if curPos.Column != pos.Column {
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t.Fatalf("column = %d, want %d for %q", curPos.Column, pos.Column, k.text)
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}
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pos.Offset += 4 + len(k.text) + 1 // 4 tabs + token bytes + newline
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pos.Line += countNewlines(k.text) + 1 // each token is on a new line
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s.Scan()
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}
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}
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// make sure there were no token-internal errors reported by scanner
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if s.ErrorCount != 0 {
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t.Errorf("%d errors", s.ErrorCount)
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}
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}
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func TestComment(t *testing.T) {
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testTokenList(t, tokenLists["comment"])
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}
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func TestOperator(t *testing.T) {
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testTokenList(t, tokenLists["operator"])
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}
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func TestBool(t *testing.T) {
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testTokenList(t, tokenLists["bool"])
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}
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func TestIdent(t *testing.T) {
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testTokenList(t, tokenLists["ident"])
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}
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func TestString(t *testing.T) {
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testTokenList(t, tokenLists["string"])
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}
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func TestNumber(t *testing.T) {
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testTokenList(t, tokenLists["number"])
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}
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func TestFloat(t *testing.T) {
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testTokenList(t, tokenLists["float"])
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}
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func TestError(t *testing.T) {
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testError(t, "\x80", "1:1", "illegal UTF-8 encoding", token.EOF)
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testError(t, "\xff", "1:1", "illegal UTF-8 encoding", token.EOF)
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testError(t, "ab\x80", "1:3", "illegal UTF-8 encoding", token.IDENT)
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testError(t, "abc\xff", "1:4", "illegal UTF-8 encoding", token.IDENT)
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testError(t, `"ab`+"\x80", "1:4", "illegal UTF-8 encoding", token.STRING)
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testError(t, `"abc`+"\xff", "1:5", "illegal UTF-8 encoding", token.STRING)
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testError(t, "`ab"+"\x80", "1:4", "illegal UTF-8 encoding", token.STRING)
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testError(t, "`abc"+"\xff", "1:5", "illegal UTF-8 encoding", token.STRING)
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testError(t, `01238`, "1:6", "illegal octal number", token.NUMBER)
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testError(t, `01238123`, "1:9", "illegal octal number", token.NUMBER)
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testError(t, `0x`, "1:3", "illegal hexadecimal number", token.NUMBER)
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testError(t, `0xg`, "1:3", "illegal hexadecimal number", token.NUMBER)
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testError(t, `'aa'`, "1:4", "illegal char literal", token.STRING)
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testError(t, `'`, "1:2", "literal not terminated", token.STRING)
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testError(t, `'`+"\n", "1:2", "literal not terminated", token.STRING)
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testError(t, `"abc`, "1:5", "literal not terminated", token.STRING)
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testError(t, `"abc`+"\n", "1:5", "literal not terminated", token.STRING)
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testError(t, "`abc\n", "2:1", "literal not terminated", token.STRING)
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testError(t, `/*/`, "1:4", "comment not terminated", token.EOF)
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}
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func testError(t *testing.T, src, pos, msg string, tok token.Token) {
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s, err := NewScanner(strings.NewReader(src))
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if err != nil {
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t.Fatal(err)
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}
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errorCalled := false
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s.Error = func(p Position, m string) {
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if !errorCalled {
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if pos != p.String() {
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t.Errorf("pos = %q, want %q for %q", p, pos, src)
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}
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if m != msg {
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t.Errorf("msg = %q, want %q for %q", m, msg, src)
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}
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errorCalled = true
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}
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}
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tk := s.Scan()
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if tk != tok {
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t.Errorf("tok = %s, want %s for %q", tk, tok, src)
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}
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if !errorCalled {
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t.Errorf("error handler not called for %q", src)
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}
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if s.ErrorCount == 0 {
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t.Errorf("count = %d, want > 0 for %q", s.ErrorCount, src)
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}
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}
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func testTokenList(t *testing.T, tokenList []tokenPair) {
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// create artifical source code
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buf := new(bytes.Buffer)
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for _, ident := range tokenList {
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fmt.Fprintf(buf, "%s\n", ident.text)
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}
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s, err := NewScanner(buf)
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if err != nil {
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t.Fatal(err)
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}
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for _, ident := range tokenList {
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tok := s.Scan()
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if tok != ident.tok {
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t.Errorf("tok = %q want %q for %q\n", tok, ident.tok, ident.text)
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}
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if s.TokenText() != ident.text {
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t.Errorf("text = %q want %q", s.TokenText(), ident.text)
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}
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}
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}
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func countNewlines(s string) int {
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n := 0
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for _, ch := range s {
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if ch == '\n' {
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n++
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}
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}
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return n
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}
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