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| 1 | +using System.Linq; |
| 2 | +using Xunit; |
| 3 | +using sly.parser; |
| 4 | +using sly.lexer; |
| 5 | +using sly.parser.generator; |
| 6 | +using System.Collections.Generic; |
| 7 | +using expressionparser; |
| 8 | +using sly.parser.llparser; |
| 9 | +using sly.parser.syntax; |
| 10 | + |
| 11 | + |
| 12 | +namespace ParserTests |
| 13 | +{ |
| 14 | + |
| 15 | + public class EBNFTests |
| 16 | + { |
| 17 | + |
| 18 | + public enum TokenType |
| 19 | + { |
| 20 | + a = 1, |
| 21 | + b = 2, |
| 22 | + c = 3, |
| 23 | + WS = 100, |
| 24 | + EOL = 101 |
| 25 | + } |
| 26 | + |
| 27 | + |
| 28 | + [LexerConfigurationAttribute] |
| 29 | + public ILexer<TokenType> BuildJsonLexer(ILexer<TokenType> lexer) |
| 30 | + { |
| 31 | + lexer.AddDefinition(new TokenDefinition<TokenType>(TokenType.a, "a")); |
| 32 | + lexer.AddDefinition(new TokenDefinition<TokenType>(TokenType.b, "b")); |
| 33 | + lexer.AddDefinition(new TokenDefinition<TokenType>(TokenType.c, "c")); |
| 34 | + |
| 35 | + lexer.AddDefinition(new TokenDefinition<TokenType>(TokenType.WS, "[ \\t]+", true)); |
| 36 | + lexer.AddDefinition(new TokenDefinition<TokenType>(TokenType.EOL, "[\\n\\r]+", true, true)); |
| 37 | + return lexer; |
| 38 | + } |
| 39 | + |
| 40 | + |
| 41 | + [Reduction("R : A B c ")] |
| 42 | + public object R(string A, string B, Token<TokenType> c) |
| 43 | + { |
| 44 | + string result = "R("; |
| 45 | + result += A + ","; |
| 46 | + result += B + ","; |
| 47 | + result += c.Value; |
| 48 | + result += ")"; |
| 49 | + return result; |
| 50 | + } |
| 51 | + |
| 52 | + [Reduction("A : a + ")] |
| 53 | + public object A(List<Token<TokenType>> astr) |
| 54 | + { |
| 55 | + string result = "A("; |
| 56 | + result +=(string) astr |
| 57 | + .Select(a => a.Value) |
| 58 | + .Aggregate<string>((a1, a2) => a1 + ", " + a2); |
| 59 | + result += ")"; |
| 60 | + return result; |
| 61 | + } |
| 62 | + |
| 63 | + [Reduction("B : b * ")] |
| 64 | + public object B(List<Token<TokenType>> bstr) |
| 65 | + { |
| 66 | + if (bstr.Any()) |
| 67 | + { |
| 68 | + string result = "B("; |
| 69 | + result += bstr |
| 70 | + .Select(b => b.Value) |
| 71 | + .Aggregate<string>((b1, b2) => b1 + ", " + b2); |
| 72 | + result += ")"; |
| 73 | + return result; |
| 74 | + } |
| 75 | + return "B()"; |
| 76 | + } |
| 77 | + |
| 78 | + private Parser<TokenType> Parser; |
| 79 | + |
| 80 | + public EBNFTests() |
| 81 | + { |
| 82 | + |
| 83 | + } |
| 84 | + |
| 85 | + private Parser<TokenType> BuildParser() |
| 86 | + { |
| 87 | + EBNFTests parserInstance = new EBNFTests(); |
| 88 | + EBNFParserBuilder<TokenType> builder = new EBNFParserBuilder<TokenType>(); |
| 89 | + |
| 90 | + EBNFTests parserTest = new EBNFTests(); |
| 91 | + |
| 92 | + Parser = builder.BuildParser(parserTest, ParserType.EBNF_LL_RECURSIVE_DESCENT, "R"); |
| 93 | + return Parser; |
| 94 | + } |
| 95 | + |
| 96 | + |
| 97 | + [Fact] |
| 98 | + public void TestParseBuild() |
| 99 | + { |
| 100 | + Parser = BuildParser(); |
| 101 | + Assert.Equal(typeof(EBNFRecursiveDescentSyntaxParser<TokenType>),Parser.SyntaxParser.GetType()); |
| 102 | + Assert.Equal(Parser.Configuration.NonTerminals.Count, 3); |
| 103 | + NonTerminal<TokenType> nt = Parser.Configuration.NonTerminals["R"]; |
| 104 | + Assert.Equal(nt.Rules.Count, 1); |
| 105 | + nt = Parser.Configuration.NonTerminals["A"]; |
| 106 | + Assert.Equal(nt.Rules.Count, 1); |
| 107 | + Rule<TokenType> rule = nt.Rules[0]; |
| 108 | + Assert.Equal(rule.Clauses.Count,1); |
| 109 | + Assert.IsType(typeof(OneOrMoreClause<TokenType>),rule.Clauses[0]); |
| 110 | + nt = Parser.Configuration.NonTerminals["B"]; |
| 111 | + Assert.Equal(nt.Rules.Count, 1); |
| 112 | + rule = nt.Rules[0]; |
| 113 | + Assert.Equal(rule.Clauses.Count, 1); |
| 114 | + Assert.IsType(typeof(ZeroOrMoreClause<TokenType>), rule.Clauses[0]); |
| 115 | + ; |
| 116 | + } |
| 117 | + |
| 118 | + [Fact] |
| 119 | + public void TestOneOrMoreWithMany() |
| 120 | + { |
| 121 | + Parser = BuildParser(); |
| 122 | + ParseResult<TokenType> result = Parser.Parse("aaa b c"); |
| 123 | + Assert.False(result.IsError); |
| 124 | + Assert.IsType(typeof(string),result.Result); |
| 125 | + Assert.Equal("R(A(a,a,a),B(b),c)",result.Result.ToString().Replace(" ","")); |
| 126 | + } |
| 127 | + |
| 128 | + [Fact] |
| 129 | + public void TestOneOrMoreWithOne() |
| 130 | + { |
| 131 | + Parser = BuildParser(); |
| 132 | + ParseResult<TokenType> result = Parser.Parse(" b c"); |
| 133 | + Assert.True(result.IsError); |
| 134 | + } |
| 135 | + |
| 136 | + [Fact] |
| 137 | + public void TestZeroOrMoreWithOne() |
| 138 | + { |
| 139 | + Parser = BuildParser(); |
| 140 | + ParseResult<TokenType> result = Parser.Parse("a b c"); |
| 141 | + Assert.False(result.IsError); |
| 142 | + Assert.IsType(typeof(string), result.Result); |
| 143 | + Assert.Equal("R(A(a),B(b),c)", result.Result.ToString().Replace(" ", "")); |
| 144 | + } |
| 145 | + |
| 146 | + [Fact] |
| 147 | + public void TestZeroOrMoreWithMany() |
| 148 | + { |
| 149 | + Parser = BuildParser(); |
| 150 | + ParseResult<TokenType> result = Parser.Parse("a bb c"); |
| 151 | + Assert.False(result.IsError); |
| 152 | + Assert.IsType(typeof(string), result.Result); |
| 153 | + Assert.Equal("R(A(a),B(b,b),c)", result.Result.ToString().Replace(" ", "")); |
| 154 | + } |
| 155 | + |
| 156 | + [Fact] |
| 157 | + public void TestZeroOrMoreWithNone() |
| 158 | + { |
| 159 | + Parser = BuildParser(); |
| 160 | + ParseResult<TokenType> result = Parser.Parse("a c"); |
| 161 | + Assert.False(result.IsError); |
| 162 | + Assert.IsType(typeof(string), result.Result); |
| 163 | + Assert.Equal("R(A(a),B(),c)", result.Result.ToString().Replace(" ", "")); |
| 164 | + } |
| 165 | + |
| 166 | + |
| 167 | + |
| 168 | + |
| 169 | + |
| 170 | + } |
| 171 | +} |
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