39 lines
813 B
Go
39 lines
813 B
Go
package lexer
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import (
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"testing"
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"monkey/token"
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)
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func TestNextToken(t *testing.T) {
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input := `=+(){},;`
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tests := []struct{
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expectedType token.TokenType
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expectedLiteral string
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}{
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{token.ASSIGN, "="},
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{token.PLUS, "+"},
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{token.LPAREN, "("},
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{token.RPAREN, ")"},
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{token.LBRACE, "{"},
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{token.RBRACE, "}"},
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{token.COMMA, ","},
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{token.SEMICOLON, ";"},
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{token.EOF, ""},
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}
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l := New(input)
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for i, tt := range tests {
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tok := l.NextToken()
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if tok.Type != tt.expectedType {
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t.Fatalf("tests[%d] - tokentype wrong. expected=%q, got %q",
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i, tt.expectedType, tok.Type)
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}
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if tok.Literal != tt.expectedLiteral {
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t.Fatalf("tests[%d] - literal wrong. expected=%q, got %q",
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i, tt.expectedLiteral, tok.Literal)
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}
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}
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}
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