From 562c190b394b0ad76d4d591be74e2f37513c964a Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Sat, 20 May 2017 16:26:54 +0200 Subject: 01 --- lexer/lexer_test.go | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) create mode 100644 lexer/lexer_test.go (limited to 'lexer/lexer_test.go') diff --git a/lexer/lexer_test.go b/lexer/lexer_test.go new file mode 100644 index 0000000..0a7f248 --- /dev/null +++ b/lexer/lexer_test.go @@ -0,0 +1,126 @@ +package lexer + +import ( + "testing" + + "monkey/token" +) + +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; + +if (5 < 10) { + return true; +} else { + return false; +} + +10 == 10; +10 != 9; +` + + 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.SEMICOLON, ";"}, + {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.IF, "if"}, + {token.LPAREN, "("}, + {token.INT, "5"}, + {token.LT, "<"}, + {token.INT, "10"}, + {token.RPAREN, ")"}, + {token.LBRACE, "{"}, + {token.RETURN, "return"}, + {token.TRUE, "true"}, + {token.SEMICOLON, ";"}, + {token.RBRACE, "}"}, + {token.ELSE, "else"}, + {token.LBRACE, "{"}, + {token.RETURN, "return"}, + {token.FALSE, "false"}, + {token.SEMICOLON, ";"}, + {token.RBRACE, "}"}, + {token.INT, "10"}, + {token.EQ, "=="}, + {token.INT, "10"}, + {token.SEMICOLON, ";"}, + {token.INT, "10"}, + {token.NOT_EQ, "!="}, + {token.INT, "9"}, + {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) + } + } +} -- cgit v1.2.3