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- package lexer
- import (
- "fgm/waiig15/token"
- "testing"
- )
- func TestNextToken(t *testing.T) {
- input := `
- let five = 5;
- let ten = 10;
- let add = fn(x, y) {
- x + y;
- }
- let result = add(five, ten);
- !-/*5;
- 5 < 10 > 5;
- `
- tests := []struct {
- expectedType token.TokenType
- expectedLiteral string
- }{
- { token.LET, "let" },
- { token.IDENT, "five" },
- { token.ASSIGN, "="},
- { token.INT, "5" },
- { token.SEMICOLON, ";" },
- { token.LET, "let" },
- { token.IDENT, "ten" },
- { token.ASSIGN, "="},
- { token.INT, "10" },
- { token.SEMICOLON, ";" },
- { token.LET, "let" },
- { token.IDENT, "add" },
- { token.ASSIGN, "="},
- { token.FUNCTION, "fn" },
- { token.LPAREN, "(" },
- { token.IDENT, "x" },
- { token.COMMA, "," },
- { token.IDENT, "y" },
- { token.RPAREN, ")" },
- { token.LBRACE, "{" },
- { token.IDENT, "x" },
- { token.PLUS, "+" },
- { token.IDENT, "y" },
- { token.SEMICOLON, ";" },
- { token.RBRACE, "}" },
- { token.LET, "let" },
- { token.IDENT, "result" },
- { token.ASSIGN, "="},
- { token.IDENT, "add" },
- { token.LPAREN, "(" },
- { token.IDENT, "five" },
- { token.COMMA, "," },
- { token.IDENT, "ten" },
- { token.RPAREN, ")" },
- {token.SEMICOLON, ";"},
- { token.BANG, "!" },
- { token.MINUS, "-" },
- { token.SLASH, "/" },
- { token.ASTERISK, "*" },
- { token.INT, "5" },
- { token.SEMICOLON, ";" },
- { token.INT, "5" },
- { token.LT, "<" },
- { token.INT, "10" },
- { token.GT, ">" },
- { token.INT, "5" },
- { token.SEMICOLON, ";" },
- { token.EOF, ""},
- }
- l := New(input)
- for i, tt := range tests {
- tok := l.NextToken()
- if tok.Type != tt.expectedType {
- t.Fatalf("tests[%d] - tokentype wrong, expected %q, got %q",
- i, tt.expectedType, tok.Type)
- }
- if tok.Literal != tt.expectedLiteral {
- t.Fatalf("tests[%d] - literal wrong, expected %q, got %q",
- i, tt.expectedLiteral, tok.Literal)
- }
- }
- }
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