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1 "{ Package: 'stx:goodies/petitparser' }" |
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2 |
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3 PPAbstractParserTest subclass:#PPComposedTest |
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4 instanceVariableNames:'' |
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5 classVariableNames:'' |
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6 poolDictionaries:'' |
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7 category:'PetitTests-Tests' |
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8 ! |
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9 |
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10 |
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11 !PPComposedTest methodsFor:'accessing'! |
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12 |
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13 comment |
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14 ^ ($" asParser , $" asParser negate star , $" asParser) flatten |
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15 ! |
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16 |
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17 identifier |
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18 ^ (#letter asParser , #word asParser star) flatten |
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19 ! |
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20 |
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21 number |
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22 ^ ($- asParser optional , #digit asParser plus , ($. asParser , #digit asParser plus) optional) flatten |
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23 ! ! |
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24 |
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25 !PPComposedTest methodsFor:'testing'! |
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26 |
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27 testDoubledString |
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28 | parser | |
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29 parser := ($' asParser , (($' asParser , $' asParser) / $' asParser negate) star flatten , $' asParser) |
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30 ==> [ :nodes | nodes second copyReplaceAll: '''''' with: '''' ]. |
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31 |
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32 self assert: parser parse: '''''' to: ''. |
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33 self assert: parser parse: '''a''' to: 'a'. |
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34 self assert: parser parse: '''ab''' to: 'ab'. |
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35 self assert: parser parse: '''a''''b''' to: 'a''b'. |
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36 self assert: parser parse: '''a''''''''b''' to: 'a''''b' |
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37 ! |
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38 |
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39 testEvenNumber |
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40 "Create a grammar that parses an even number of a's and b's." |
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41 |
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42 | a as b bs s | |
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43 a := $a asParser ==> [ :char | as := as + 1 ]. |
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44 b := $b asParser ==> [ :char | bs := bs + 1 ]. |
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45 s := (a / b) star >=> [ :stream :cc | |
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46 as := bs := 0. |
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47 cc value. |
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48 (as even and: [ bs even ]) |
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49 ifFalse: [ PPFailure message: 'Even number of a and b expected' at: 0 ] ]. |
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50 |
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51 self assert: s fail: 'a' end: 1. |
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52 self assert: s fail: 'b' end: 1. |
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53 self assert: s fail: 'ab' end: 2. |
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54 self assert: s fail: 'ba' end: 2. |
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55 self assert: s fail: 'aaa' end: 3. |
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56 self assert: s fail: 'bbb' end: 3. |
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57 self assert: s fail: 'aab' end: 3. |
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58 self assert: s fail: 'abb' end: 3. |
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59 |
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60 self assert: s parse: ''. |
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61 self assert: s parse: 'aa'. |
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62 self assert: s parse: 'bb'. |
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63 self assert: s parse: 'aaaa'. |
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64 self assert: s parse: 'aabb'. |
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65 self assert: s parse: 'abab'. |
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66 self assert: s parse: 'baba'. |
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67 self assert: s parse: 'bbaa'. |
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68 self assert: s parse: 'bbbb' |
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69 ! |
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70 |
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71 testIfThenElse |
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72 "S ::= if C then S else S | if C then S | X" |
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73 |
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74 | start if then else cond expr parser | |
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75 start := PPDelegateParser new. |
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76 if := 'if' asParser token trim. |
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77 then := 'then' asParser token trim. |
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78 else := 'else' asParser token trim. |
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79 cond := 'C' asParser token trim. |
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80 expr := 'X' asParser token trim. |
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81 start setParser: (if , cond , then , start , else , start) / (if , cond , then , start) / expr. |
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82 parser := start end. |
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83 self assert: parser parse: 'X'. |
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84 self assert: parser parse: 'if C then X'. |
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85 self assert: parser parse: 'if C then X else X'. |
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86 self assert: parser parse: 'if C then if C then X'. |
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87 self assert: parser parse: 'if C then if C then X else if C then X'. |
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88 self assert: parser parse: 'if C then if C then X else X else if C then X'. |
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89 self assert: parser parse: 'if C then if C then X else X else if C then X else X'. |
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90 self assert: parser fail: 'if C'. |
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91 self assert: parser fail: 'if C else X'. |
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92 self assert: parser fail: 'if C then if C' |
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93 ! |
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94 |
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95 testLeftRecursion |
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96 "S ::= S 'x' S / '1'" |
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97 |
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98 | parser | |
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99 parser := PPDelegateParser new. |
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100 parser setParser: ((parser , $x asParser , parser) / $1 asParser) memoized flatten. |
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101 |
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102 self assert: parser parse: '1' to: '1'. |
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103 self assert: parser parse: '1x1' to: '1x1'. |
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104 self assert: parser parse: '1x1x1' to: '1x1x1'. |
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105 self assert: parser parse: '1x1x1x1' to: '1x1x1x1'. |
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106 self assert: parser parse: '1x1x1x1x1' to: '1x1x1x1x1'. |
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107 self assert: parser parse: '1x1x1x1x1x1' to: '1x1x1x1x1x1' |
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108 ! |
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109 |
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110 testListOfIntegers |
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111 "S ::= S , number | number" |
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112 |
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113 | number list parser | |
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114 number := #digit asParser plus flatten trim |
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115 ==> [ :node | node asInteger ]. |
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116 list := (number separatedBy: $, asParser token trim) |
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117 ==> [ :node | node select: [ :each | each isInteger ] ]. |
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118 parser := list end. |
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119 |
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120 self assert: parser parse: '1' to: (1 to: 1) asArray. |
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121 self assert: parser parse: '1,2' to: (1 to: 2) asArray. |
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122 self assert: parser parse: '1,2,3' to: (1 to: 3) asArray. |
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123 self assert: parser parse: '1,2,3,4' to: (1 to: 4) asArray. |
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124 self assert: parser parse: '1,2,3,4,5' to: (1 to: 5) asArray. |
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125 |
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126 self assert: parser parse: '1' to: (1 to: 1) asArray. |
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127 self assert: parser parse: '1, 2' to: (1 to: 2) asArray. |
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128 self assert: parser parse: '1, 2, 3' to: (1 to: 3) asArray. |
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129 self assert: parser parse: '1, 2, 3, 4' to: (1 to: 4) asArray. |
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130 self assert: parser parse: '1, 2, 3, 4, 5' to: (1 to: 5) asArray. |
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131 |
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132 self assert: parser parse: '1' to: (1 to: 1) asArray. |
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133 self assert: parser parse: '1 ,2' to: (1 to: 2) asArray. |
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134 self assert: parser parse: '1 ,2 ,3' to: (1 to: 3) asArray. |
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135 self assert: parser parse: '1 ,2 ,3 ,4' to: (1 to: 4) asArray. |
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136 self assert: parser parse: '1 ,2 ,3 ,4 ,5' to: (1 to: 5) asArray. |
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137 |
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138 self assert: parser fail: ''. |
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139 self assert: parser fail: ','. |
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140 self assert: parser fail: '1,'. |
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141 self assert: parser fail: '1,,2' |
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142 ! |
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143 |
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144 testNestedComments |
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145 "C ::= B I* E" |
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146 "I ::= !!E (C | T)" |
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147 "B ::= /*" |
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148 "E ::= */" |
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149 "T ::= ." |
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150 |
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151 | begin end any inside parser | |
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152 begin := '/*' asParser. |
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153 end := '*/' asParser. |
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154 any := #any asParser. |
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155 |
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156 parser := PPDelegateParser new. |
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157 inside := end not , (parser / any). |
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158 parser setParser: begin , inside star , end. |
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159 |
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160 self assert: parser parse: '/*ab*/cd' end: 6. |
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161 self assert: parser parse: '/*a/*b*/c*/'. |
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162 self assert: parser fail: '/*a/*b*/c' |
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163 ! |
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164 |
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165 testPalindrome |
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166 "S0 ::= a S1 a | b S1 b | ... |
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167 S1 ::= S0 | epsilon" |
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168 |
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169 | s0 s1 parser | |
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170 s0 := PPDelegateParser new. |
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171 s1 := PPDelegateParser new. |
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172 s0 setParser: ($a asParser , s1 , $a asParser) |
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173 / ($b asParser , s1 , $b asParser) |
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174 / ($c asParser , s1 , $c asParser). |
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175 s1 setParser: s0 / nil asParser. |
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176 parser := s0 flatten end. |
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177 |
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178 self assert: parser parse: 'aa' to: 'aa'. |
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179 self assert: parser parse: 'bb' to: 'bb'. |
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180 self assert: parser parse: 'cc' to: 'cc'. |
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181 |
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182 self assert: parser parse: 'abba' to: 'abba'. |
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183 self assert: parser parse: 'baab' to: 'baab'. |
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184 |
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185 self assert: parser parse: 'abccba' to: 'abccba'. |
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186 self assert: parser parse: 'abaaba' to: 'abaaba'. |
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187 self assert: parser parse: 'cbaabc' to: 'cbaabc'. |
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188 |
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189 self assert: parser fail: 'a'. |
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190 self assert: parser fail: 'ab'. |
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191 self assert: parser fail: 'aab'. |
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192 self assert: parser fail: 'abccbb' |
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193 ! |
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194 |
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195 testParseAaaBbb |
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196 "S0 ::= a S1 b |
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197 S1 ::= S0 | epsilon" |
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198 |
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199 | s0 s1 parser | |
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200 s0 := PPDelegateParser new. |
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201 s1 := PPDelegateParser new. |
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202 s0 setParser: $a asParser , s1 , $b asParser. |
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203 s1 setParser: s0 / nil asParser. |
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204 parser := s0 flatten. |
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205 |
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206 self assert: parser parse: 'ab' to: 'ab'. |
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207 self assert: parser parse: 'aabb' to: 'aabb'. |
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208 self assert: parser parse: 'aaabbb' to: 'aaabbb'. |
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209 self assert: parser parse: 'aaaabbbb' to: 'aaaabbbb'. |
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210 |
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211 self assert: parser parse: 'abb' to: 'ab' end: 2. |
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212 self assert: parser parse: 'aabbb' to: 'aabb' end: 4. |
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213 self assert: parser parse: 'aaabbbb' to: 'aaabbb' end: 6. |
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214 self assert: parser parse: 'aaaabbbbb' to: 'aaaabbbb' end: 8. |
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215 |
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216 self assert: parser fail: 'a'. |
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217 self assert: parser fail: 'b'. |
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218 self assert: parser fail: 'aab'. |
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219 self assert: parser fail: 'aaabb' |
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220 ! |
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221 |
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222 testParseAaaaaa |
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223 "S ::= a a S | epsilon" |
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224 |
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225 | s0 s1 parser | |
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226 s0 := PPDelegateParser new. |
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227 s1 := $a asParser , $a asParser , s0. |
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228 s0 setParser: s1 / nil asParser. |
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229 parser := s0 flatten. |
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230 |
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231 self assert: parser parse: '' to: ''. |
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232 self assert: parser parse: 'aa' to: 'aa'. |
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233 self assert: parser parse: 'aaaa' to: 'aaaa'. |
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234 self assert: parser parse: 'aaaaaa' to: 'aaaaaa'. |
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235 |
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236 self assert: parser parse: 'a' to: '' end: 0. |
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237 self assert: parser parse: 'aaa' to: 'aa' end: 2. |
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238 self assert: parser parse: 'aaaaa' to: 'aaaa' end: 4. |
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239 self assert: parser parse: 'aaaaaaa' to: 'aaaaaa' end: 6 |
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240 ! |
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241 |
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242 testParseAbAbAb |
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243 "S ::= (A B)+" |
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244 |
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245 | parser | |
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246 parser := ($a asParser , $b asParser) plus flatten. |
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247 |
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248 self assert: parser parse: 'ab' to: 'ab'. |
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249 self assert: parser parse: 'abab' to: 'abab'. |
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250 self assert: parser parse: 'ababab' to: 'ababab'. |
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251 self assert: parser parse: 'abababab' to: 'abababab'. |
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252 |
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253 self assert: parser parse: 'abb' to: 'ab' end: 2. |
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254 self assert: parser parse: 'ababa' to: 'abab' end: 4. |
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255 self assert: parser parse: 'abababb' to: 'ababab' end: 6. |
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256 self assert: parser parse: 'ababababa' to: 'abababab' end: 8. |
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257 |
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258 self assert: parser fail: ''. |
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259 self assert: parser fail: 'a'. |
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260 self assert: parser fail: 'bab' |
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261 ! |
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262 |
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263 testParseAbabbb |
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264 "S ::= (A | B)+" |
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265 |
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266 | parser | |
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267 parser := ($a asParser / $b asParser) plus flatten. |
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268 |
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269 self assert: parser parse: 'a' to: 'a'. |
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270 self assert: parser parse: 'b' to: 'b'. |
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271 self assert: parser parse: 'ab' to: 'ab'. |
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272 self assert: parser parse: 'ba' to: 'ba'. |
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273 self assert: parser parse: 'aaa' to: 'aaa'. |
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274 self assert: parser parse: 'aab' to: 'aab'. |
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275 self assert: parser parse: 'aba' to: 'aba'. |
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276 self assert: parser parse: 'baa' to: 'baa'. |
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277 self assert: parser parse: 'abb' to: 'abb'. |
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278 self assert: parser parse: 'bab' to: 'bab'. |
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279 self assert: parser parse: 'bba' to: 'bba'. |
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280 self assert: parser parse: 'bbb' to: 'bbb'. |
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281 |
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282 self assert: parser parse: 'ac' to: 'a' end: 1. |
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283 self assert: parser parse: 'bc' to: 'b' end: 1. |
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284 self assert: parser parse: 'abc' to: 'ab' end: 2. |
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285 self assert: parser parse: 'bac' to: 'ba' end: 2. |
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286 |
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287 self assert: parser fail: ''. |
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288 self assert: parser fail: 'c' |
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289 ! |
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290 |
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291 testParseAnBnCn |
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292 "PEGs for a non context- free language: |
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293 |
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294 a^n , b^n , c^n |
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295 |
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296 S <- &P1 P2 |
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297 P1 <- AB 'c' |
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298 AB <- 'a' AB 'b' / epsilon |
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299 P2 <- 'a'* BC end |
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300 BC <- 'b' BC 'c' / epsilon" |
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301 |
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302 | s p1 ab p2 bc | |
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303 s := PPDelegateParser new. |
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304 p1 := PPDelegateParser new. |
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305 ab := PPDelegateParser new. |
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306 p2 := PPDelegateParser new. |
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307 bc := PPDelegateParser new. |
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308 |
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309 s setParser: (p1 and , p2 end) flatten. |
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310 p1 setParser: ab , $c asParser. |
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311 ab setParser: ($a asParser , ab , $b asParser) optional. |
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312 p2 setParser: $a asParser star , bc. |
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313 bc setParser: ($b asParser , bc , $c asParser) optional. |
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314 |
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315 self assert: s parse: 'abc' to: 'abc'. |
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316 self assert: s parse: 'aabbcc' to: 'aabbcc'. |
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317 self assert: s parse: 'aaabbbccc' to: 'aaabbbccc'. |
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318 |
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319 self assert: s fail: 'bc'. |
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320 self assert: s fail: 'ac'. |
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321 self assert: s fail: 'ab'. |
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322 self assert: s fail: 'abbcc'. |
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323 self assert: s fail: 'aabcc'. |
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324 self assert: s fail: 'aabbc' |
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325 ! ! |
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326 |
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327 !PPComposedTest methodsFor:'testing-examples'! |
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328 |
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329 testComment |
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330 self assert: self comment parse: '""' to: '""'. |
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331 self assert: self comment parse: '"a"' to: '"a"'. |
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332 self assert: self comment parse: '"ab"' to: '"ab"'. |
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333 self assert: self comment parse: '"abc"' to: '"abc"'. |
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334 |
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335 self assert: self comment parse: '""a' to: '""' end: 2. |
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336 self assert: self comment parse: '"a"a' to: '"a"' end: 3. |
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337 self assert: self comment parse: '"ab"a' to: '"ab"' end: 4. |
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338 self assert: self comment parse: '"abc"a' to: '"abc"' end: 5. |
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339 |
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340 self assert: self comment fail: '"'. |
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341 self assert: self comment fail: '"a'. |
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342 self assert: self comment fail: '"aa'. |
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343 self assert: self comment fail: 'a"'. |
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344 self assert: self comment fail: 'aa"' |
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345 ! |
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346 |
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347 testIdentifier |
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348 self assert: self identifier parse: 'a' to: 'a'. |
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349 self assert: self identifier parse: 'a1' to: 'a1'. |
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350 self assert: self identifier parse: 'a12' to: 'a12'. |
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351 self assert: self identifier parse: 'ab' to: 'ab'. |
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352 self assert: self identifier parse: 'a1b' to: 'a1b'. |
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353 |
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354 self assert: self identifier parse: 'a_' to: 'a' end: 1. |
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355 self assert: self identifier parse: 'a1-' to: 'a1' end: 2. |
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356 self assert: self identifier parse: 'a12+' to: 'a12' end: 3. |
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357 self assert: self identifier parse: 'ab^' to: 'ab' end: 2. |
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358 self assert: self identifier parse: 'a1b*' to: 'a1b' end: 3. |
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359 |
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360 self assert: self identifier fail: ''. |
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361 self assert: self identifier fail: '1'. |
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362 self assert: self identifier fail: '1a' |
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363 ! |
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364 |
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365 testNumber |
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366 self assert: self number parse: '1' to: '1'. |
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367 self assert: self number parse: '12' to: '12'. |
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368 self assert: self number parse: '12.3' to: '12.3'. |
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369 self assert: self number parse: '12.34' to: '12.34'. |
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370 |
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371 self assert: self number parse: '1..' to: '1' end: 1. |
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372 self assert: self number parse: '12-' to: '12' end: 2. |
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373 self assert: self number parse: '12.3.' to: '12.3' end: 4. |
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374 self assert: self number parse: '12.34.' to: '12.34' end: 5. |
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375 |
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376 self assert: self number parse: '-1' to: '-1'. |
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377 self assert: self number parse: '-12' to: '-12'. |
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378 self assert: self number parse: '-12.3' to: '-12.3'. |
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379 self assert: self number parse: '-12.34' to: '-12.34'. |
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380 |
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381 self assert: self number fail: ''. |
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382 self assert: self number fail: '-'. |
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383 self assert: self number fail: '.'. |
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384 self assert: self number fail: '.1' |
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385 ! |
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386 |
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387 testReturn |
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388 | number spaces return | |
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389 number := #digit asParser plus flatten. |
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390 spaces := #space asParser star. |
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391 return := (spaces , $^ asParser token , spaces , number) |
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392 ==> [ :nodes | Array with: #return with: (nodes at: 4) ]. |
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393 |
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394 self assert: return parse: '^1' to: #(return '1'). |
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395 self assert: return parse: '^12' to: #(return '12'). |
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396 self assert: return parse: '^ 123' to: #(return '123'). |
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397 self assert: return parse: '^ 1234' to: #(return '1234'). |
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398 |
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399 self assert: return fail: '1'. |
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400 self assert: return fail: '^' |
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401 ! ! |
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402 |
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403 !PPComposedTest class methodsFor:'documentation'! |
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404 |
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405 version |
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406 ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPComposedTest.st,v 1.5 2014-03-04 14:34:10 cg Exp $' |
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407 ! |
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408 |
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409 version_CVS |
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410 ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPComposedTest.st,v 1.5 2014-03-04 14:34:10 cg Exp $' |
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411 ! |
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412 |
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413 version_SVN |
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414 ^ '$Id: PPComposedTest.st,v 1.5 2014-03-04 14:34:10 cg Exp $' |
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415 ! ! |
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416 |