diff options
Diffstat (limited to 'grammar/lexical/parser/parser_test.go')
| -rw-r--r-- | grammar/lexical/parser/parser_test.go | 1389 |
1 files changed, 1389 insertions, 0 deletions
diff --git a/grammar/lexical/parser/parser_test.go b/grammar/lexical/parser/parser_test.go new file mode 100644 index 0000000..d6cc4a8 --- /dev/null +++ b/grammar/lexical/parser/parser_test.go @@ -0,0 +1,1389 @@ +package parser + +import ( + "fmt" + "reflect" + "strings" + "testing" + + spec "github.com/nihei9/vartan/spec/grammar" + "github.com/nihei9/vartan/ucd" +) + +func TestParse(t *testing.T) { + tests := []struct { + pattern string + fragments map[spec.LexKindName]string + ast CPTree + syntaxError error + + // When an AST is large, as patterns containing a character property expression, this test only checks + // that the pattern is parsable. The check of the validity of such AST is performed by checking that it + // can be matched correctly using the driver. + skipTestAST bool + }{ + { + pattern: "a", + ast: newSymbolNode('a'), + }, + { + pattern: "abc", + ast: genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + }, + { + pattern: "a?", + ast: newOptionNode( + newSymbolNode('a'), + ), + }, + { + pattern: "[abc]?", + ast: newOptionNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + }, + { + pattern: "\\u{3042}?", + ast: newOptionNode( + newSymbolNode('\u3042'), + ), + }, + { + pattern: "\\p{Letter}?", + skipTestAST: true, + }, + { + pattern: "\\f{a2c}?", + fragments: map[spec.LexKindName]string{ + "a2c": "abc", + }, + ast: newOptionNode( + newFragmentNode("a2c", + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + ), + }, + { + pattern: "(a)?", + ast: newOptionNode( + newSymbolNode('a'), + ), + }, + { + pattern: "((a?)?)?", + ast: newOptionNode( + newOptionNode( + newOptionNode( + newSymbolNode('a'), + ), + ), + ), + }, + { + pattern: "(abc)?", + ast: newOptionNode( + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + }, + { + pattern: "(a|b)?", + ast: newOptionNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + ), + ), + }, + { + pattern: "?", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "(?)", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a|?", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "?|b", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a??", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a*", + ast: newRepeatNode( + newSymbolNode('a'), + ), + }, + { + pattern: "[abc]*", + ast: newRepeatNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + }, + { + pattern: "\\u{3042}*", + ast: newRepeatNode( + newSymbolNode('\u3042'), + ), + }, + { + pattern: "\\p{Letter}*", + skipTestAST: true, + }, + { + pattern: "\\f{a2c}*", + fragments: map[spec.LexKindName]string{ + "a2c": "abc", + }, + ast: newRepeatNode( + newFragmentNode("a2c", + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + ), + }, + { + pattern: "((a*)*)*", + ast: newRepeatNode( + newRepeatNode( + newRepeatNode( + newSymbolNode('a'), + ), + ), + ), + }, + { + pattern: "(abc)*", + ast: newRepeatNode( + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + }, + { + pattern: "(a|b)*", + ast: newRepeatNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + ), + ), + }, + { + pattern: "*", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "(*)", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a|*", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "*|b", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a**", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a+", + ast: genConcatNode( + newSymbolNode('a'), + newRepeatNode( + newSymbolNode('a'), + ), + ), + }, + { + pattern: "[abc]+", + ast: genConcatNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + newRepeatNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + ), + }, + { + pattern: "\\u{3042}+", + ast: genConcatNode( + newSymbolNode('\u3042'), + newRepeatNode( + newSymbolNode('\u3042'), + ), + ), + }, + { + pattern: "\\p{Letter}+", + skipTestAST: true, + }, + { + pattern: "\\f{a2c}+", + fragments: map[spec.LexKindName]string{ + "a2c": "abc", + }, + ast: genConcatNode( + newFragmentNode("a2c", + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + newRepeatNode( + newFragmentNode("a2c", + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + ), + ), + }, + { + pattern: "((a+)+)+", + ast: genConcatNode( + genConcatNode( + genConcatNode( + genConcatNode( + newSymbolNode('a'), + newRepeatNode( + newSymbolNode('a'), + ), + ), + newRepeatNode( + genConcatNode( + newSymbolNode('a'), + newRepeatNode( + newSymbolNode('a'), + ), + ), + ), + ), + newRepeatNode( + genConcatNode( + genConcatNode( + newSymbolNode('a'), + newRepeatNode( + newSymbolNode('a'), + ), + ), + newRepeatNode( + genConcatNode( + newSymbolNode('a'), + newRepeatNode( + newSymbolNode('a'), + ), + ), + ), + ), + ), + ), + ), + }, + { + pattern: "(abc)+", + ast: genConcatNode( + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + newRepeatNode( + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + ), + }, + { + pattern: "(a|b)+", + ast: genConcatNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + ), + newRepeatNode( + genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + ), + ), + ), + }, + { + pattern: "+", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "(+)", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a|+", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "+|b", + syntaxError: synErrRepNoTarget, + }, + { + pattern: "a++", + syntaxError: synErrRepNoTarget, + }, + { + pattern: ".", + ast: newRangeSymbolNode(0x00, 0x10FFFF), + }, + { + pattern: "[a]", + ast: newSymbolNode('a'), + }, + { + pattern: "[abc]", + ast: genAltNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + }, + { + pattern: "[a-z]", + ast: newRangeSymbolNode('a', 'z'), + }, + { + pattern: "[A-Za-z]", + ast: genAltNode( + newRangeSymbolNode('A', 'Z'), + newRangeSymbolNode('a', 'z'), + ), + }, + { + pattern: "[\\u{004E}]", + ast: newSymbolNode('N'), + }, + { + pattern: "[\\u{0061}-\\u{007A}]", + ast: newRangeSymbolNode('a', 'z'), + }, + { + pattern: "[\\p{Lu}]", + skipTestAST: true, + }, + { + pattern: "[a-\\p{Lu}]", + syntaxError: synErrRangePropIsUnavailable, + }, + { + pattern: "[\\p{Lu}-z]", + syntaxError: synErrRangePropIsUnavailable, + }, + { + pattern: "[\\p{Lu}-\\p{Ll}]", + syntaxError: synErrRangePropIsUnavailable, + }, + { + pattern: "[z-a]", + syntaxError: synErrRangeInvalidOrder, + }, + { + pattern: "a[]", + syntaxError: synErrBExpNoElem, + }, + { + pattern: "[]a", + syntaxError: synErrBExpNoElem, + }, + { + pattern: "[]", + syntaxError: synErrBExpNoElem, + }, + { + pattern: "[^\\u{004E}]", + ast: genAltNode( + newRangeSymbolNode(0x00, '\u004E'-1), + newRangeSymbolNode('\u004E'+1, 0x10FFFF), + ), + }, + { + pattern: "[^\\u{0061}-\\u{007A}]", + ast: genAltNode( + newRangeSymbolNode(0x00, '\u0061'-1), + newRangeSymbolNode('\u007A'+1, 0x10FFFF), + ), + }, + { + pattern: "[^\\p{Lu}]", + skipTestAST: true, + }, + { + pattern: "[^a-\\p{Lu}]", + syntaxError: synErrRangePropIsUnavailable, + }, + { + pattern: "[^\\p{Lu}-z]", + syntaxError: synErrRangePropIsUnavailable, + }, + { + pattern: "[^\\p{Lu}-\\p{Ll}]", + syntaxError: synErrRangePropIsUnavailable, + }, + { + pattern: "[^\\u{0000}-\\u{10FFFF}]", + syntaxError: synErrUnmatchablePattern, + }, + { + pattern: "[^\\u{0000}-\\u{FFFF}\\u{010000}-\\u{10FFFF}]", + syntaxError: synErrUnmatchablePattern, + }, + { + pattern: "[^]", + ast: newSymbolNode('^'), + }, + { + pattern: "[", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "([", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "[a", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "([a", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "[a-", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "([a-", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "[^", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "([^", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "[^a", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "([^a", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "[^a-", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "([^a-", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "]", + ast: newSymbolNode(']'), + }, + { + pattern: "(]", + syntaxError: synErrGroupUnclosed, + }, + { + pattern: "a]", + ast: genConcatNode( + newSymbolNode('a'), + newSymbolNode(']'), + ), + }, + { + pattern: "(a]", + syntaxError: synErrGroupUnclosed, + }, + { + pattern: "([)", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "([a)", + syntaxError: synErrBExpUnclosed, + }, + { + pattern: "[a-]", + ast: genAltNode( + newSymbolNode('a'), + newSymbolNode('-'), + ), + }, + { + pattern: "[^a-]", + ast: genAltNode( + newRangeSymbolNode(0x00, 0x2C), + newRangeSymbolNode(0x2E, 0x60), + newRangeSymbolNode(0x62, 0x10FFFF), + ), + }, + { + pattern: "[-z]", + ast: genAltNode( + newSymbolNode('-'), + newSymbolNode('z'), + ), + }, + { + pattern: "[^-z]", + ast: newAltNode( + newRangeSymbolNode(0x00, 0x2C), + newAltNode( + newRangeSymbolNode(0x2E, 0x79), + newRangeSymbolNode(0x7B, 0x10FFFF), + ), + ), + }, + { + pattern: "[-]", + ast: newSymbolNode('-'), + }, + { + pattern: "[^-]", + ast: genAltNode( + newRangeSymbolNode(0x00, 0x2C), + newRangeSymbolNode(0x2E, 0x10FFFF), + ), + }, + { + pattern: "[^01]", + ast: genAltNode( + newRangeSymbolNode(0x00, '0'-1), + newRangeSymbolNode('1'+1, 0x10FFFF), + ), + }, + { + pattern: "[^10]", + ast: genAltNode( + newRangeSymbolNode(0x00, '0'-1), + newRangeSymbolNode('1'+1, 0x10FFFF), + ), + }, + { + pattern: "[^a-z]", + ast: genAltNode( + newRangeSymbolNode(0x00, 'a'-1), + newRangeSymbolNode('z'+1, 0x10FFFF), + ), + }, + { + pattern: "[^az]", + ast: genAltNode( + newRangeSymbolNode(0x00, 'a'-1), + genAltNode( + newRangeSymbolNode('a'+1, 'z'-1), + newRangeSymbolNode('z'+1, 0x10FFFF), + ), + ), + }, + { + pattern: "\\u{006E}", + ast: newSymbolNode('\u006E'), + }, + { + pattern: "\\u{03BD}", + ast: newSymbolNode('\u03BD'), + }, + { + pattern: "\\u{306B}", + ast: newSymbolNode('\u306B'), + }, + { + pattern: "\\u{01F638}", + ast: newSymbolNode('\U0001F638'), + }, + { + pattern: "\\u{0000}", + ast: newSymbolNode('\u0000'), + }, + { + pattern: "\\u{10FFFF}", + ast: newSymbolNode('\U0010FFFF'), + }, + { + pattern: "\\u{110000}", + syntaxError: synErrCPExpOutOfRange, + }, + { + pattern: "\\u", + syntaxError: synErrCPExpInvalidForm, + }, + { + pattern: "\\u{", + syntaxError: synErrCPExpInvalidForm, + }, + { + pattern: "\\u{03BD", + syntaxError: synErrCPExpInvalidForm, + }, + { + pattern: "\\u{}", + syntaxError: synErrCPExpInvalidForm, + }, + { + pattern: "\\p{Letter}", + skipTestAST: true, + }, + { + pattern: "\\p{General_Category=Letter}", + skipTestAST: true, + }, + { + pattern: "\\p{ Letter }", + skipTestAST: true, + }, + { + pattern: "\\p{ General_Category = Letter }", + skipTestAST: true, + }, + { + pattern: "\\p", + syntaxError: synErrCharPropExpInvalidForm, + }, + { + pattern: "\\p{", + syntaxError: synErrCharPropExpInvalidForm, + }, + { + pattern: "\\p{Letter", + syntaxError: synErrCharPropExpInvalidForm, + }, + { + pattern: "\\p{General_Category=}", + syntaxError: synErrCharPropExpInvalidForm, + }, + { + pattern: "\\p{General_Category= }", + syntaxError: synErrCharPropInvalidSymbol, + }, + { + pattern: "\\p{=Letter}", + syntaxError: synErrCharPropExpInvalidForm, + }, + { + pattern: "\\p{ =Letter}", + syntaxError: synErrCharPropInvalidSymbol, + }, + { + pattern: "\\p{=}", + syntaxError: synErrCharPropExpInvalidForm, + }, + { + pattern: "\\p{}", + syntaxError: synErrCharPropExpInvalidForm, + }, + { + pattern: "\\f{a2c}", + fragments: map[spec.LexKindName]string{ + "a2c": "abc", + }, + ast: newFragmentNode("a2c", + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + }, + { + pattern: "\\f{ a2c }", + fragments: map[spec.LexKindName]string{ + "a2c": "abc", + }, + ast: newFragmentNode("a2c", + genConcatNode( + newSymbolNode('a'), + newSymbolNode('b'), + newSymbolNode('c'), + ), + ), + }, + { + pattern: "\\f", + syntaxError: synErrFragmentExpInvalidForm, + }, + { + pattern: "\\f{", + syntaxError: synErrFragmentExpInvalidForm, + }, + { + pattern: "\\f{a2c", + fragments: map[spec.LexKindName]string{ + "a2c": "abc", + }, + syntaxError: synErrFragmentExpInvalidForm, + }, + { + pattern: "(a)", + ast: newSymbolNode('a'), + }, + { + pattern: "(((a)))", + ast: newSymbolNode('a'), + }, + { + pattern: "a()", + syntaxError: synErrGroupNoElem, + }, + { + pattern: "()a", + syntaxError: synErrGroupNoElem, + }, + { + pattern: "()", + syntaxError: synErrGroupNoElem, + }, + { + pattern: "(", + syntaxError: synErrGroupUnclosed, + }, + { + pattern: "a(", + syntaxError: synErrGroupUnclosed, + }, + { + pattern: "(a", + syntaxError: synErrGroupUnclosed, + }, + { + pattern: "((", + syntaxError: synErrGroupUnclosed, + }, + { + pattern: "((a)", + syntaxError: synErrGroupUnclosed, + }, + { + pattern: ")", + syntaxError: synErrGroupNoInitiator, + }, + { + pattern: "a)", + syntaxError: synErrGroupNoInitiator, + }, + { + pattern: ")a", + syntaxError: synErrGroupNoInitiator, + }, + { + pattern: "))", + syntaxError: synErrGroupNoInitiator, + }, + { + pattern: "(a))", + syntaxError: synErrGroupNoInitiator, + }, + { + pattern: "Mulder|Scully", + ast: genAltNode( + genConcatNode( + newSymbolNode('M'), + newSymbolNode('u'), + newSymbolNode('l'), + newSymbolNode('d'), + newSymbolNode('e'), + newSymbolNode('r'), + ), + genConcatNode( + newSymbolNode('S'), + newSymbolNode('c'), + newSymbolNode('u'), + newSymbolNode('l'), + newSymbolNode('l'), + newSymbolNode('y'), + ), + ), + }, + { + pattern: "Langly|Frohike|Byers", + ast: genAltNode( + genConcatNode( + newSymbolNode('L'), + newSymbolNode('a'), + newSymbolNode('n'), + newSymbolNode('g'), + newSymbolNode('l'), + newSymbolNode('y'), + ), + genConcatNode( + newSymbolNode('F'), + newSymbolNode('r'), + newSymbolNode('o'), + newSymbolNode('h'), + newSymbolNode('i'), + newSymbolNode('k'), + newSymbolNode('e'), + ), + genConcatNode( + newSymbolNode('B'), + newSymbolNode('y'), + newSymbolNode('e'), + newSymbolNode('r'), + newSymbolNode('s'), + ), + ), + }, + { + pattern: "|", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "||", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "Mulder|", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "|Scully", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "Langly|Frohike|", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "Langly||Byers", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "|Frohike|Byers", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "|Frohike|", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "Fox(|)Mulder", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "(Fox|)Mulder", + syntaxError: synErrAltLackOfOperand, + }, + { + pattern: "Fox(|Mulder)", + syntaxError: synErrAltLackOfOperand, + }, + } + for i, tt := range tests { + t.Run(fmt.Sprintf("#%v %v", i, tt.pattern), func(t *testing.T) { + fragmentTrees := map[spec.LexKindName]CPTree{} + for kind, pattern := range tt.fragments { + p := NewParser(kind, strings.NewReader(pattern)) + root, err := p.Parse() + if err != nil { + t.Fatal(err) + } + + fragmentTrees[kind] = root + } + err := CompleteFragments(fragmentTrees) + if err != nil { + t.Fatal(err) + } + + p := NewParser(spec.LexKindName("test"), strings.NewReader(tt.pattern)) + root, err := p.Parse() + if tt.syntaxError != nil { + // printCPTree(os.Stdout, root, "", "") + if err != ParseErr { + t.Fatalf("unexpected error: want: %v, got: %v", ParseErr, err) + } + _, synErr := p.Error() + if synErr != tt.syntaxError { + t.Fatalf("unexpected syntax error: want: %v, got: %v", tt.syntaxError, synErr) + } + if root != nil { + t.Fatalf("tree must be nil") + } + } else { + if err != nil { + detail, cause := p.Error() + t.Fatalf("%v: %v: %v", err, cause, detail) + } + if root == nil { + t.Fatal("tree must be non-nil") + } + + complete, err := ApplyFragments(root, fragmentTrees) + if err != nil { + t.Fatal(err) + } + if !complete { + t.Fatalf("incomplete fragments") + } + + // printCPTree(os.Stdout, root, "", "") + if !tt.skipTestAST { + r := root.(*rootNode) + testAST(t, tt.ast, r.tree) + } + } + }) + } +} + +func TestParse_ContributoryPropertyIsNotExposed(t *testing.T) { + for _, cProp := range ucd.ContributoryProperties() { + t.Run(fmt.Sprintf("%v", cProp), func(t *testing.T) { + p := NewParser(spec.LexKindName("test"), strings.NewReader(fmt.Sprintf(`\p{%v=yes}`, cProp))) + root, err := p.Parse() + if err == nil { + t.Fatalf("expected syntax error: got: nil") + } + _, synErr := p.Error() + if synErr != synErrCharPropUnsupported { + t.Fatalf("unexpected syntax error: want: %v, got: %v", synErrCharPropUnsupported, synErr) + } + if root != nil { + t.Fatalf("tree is not nil") + } + }) + } +} + +func TestExclude(t *testing.T) { + for _, test := range []struct { + caption string + target CPTree + base CPTree + result CPTree + }{ + // t.From > b.From && t.To < b.To + + // |t.From - b.From| = 1 + // |b.To - t.To| = 1 + // + // Target (t): +--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+ +--+ + { + caption: "|t.From - b.From| = 1 && |b.To - t.To| = 1", + target: newSymbolNode('1'), + base: newRangeSymbolNode('0', '2'), + result: newAltNode( + newSymbolNode('0'), + newSymbolNode('2'), + ), + }, + // |t.From - b.From| > 1 + // |b.To - t.To| > 1 + // + // Target (t): +--+ + // Base (b): +--+--+--+--+--+ + // Result (b - t): +--+--+ +--+--+ + { + caption: "|t.From - b.From| > 1 && |b.To - t.To| > 1", + target: newSymbolNode('2'), + base: newRangeSymbolNode('0', '4'), + result: newAltNode( + newRangeSymbolNode('0', '1'), + newRangeSymbolNode('3', '4'), + ), + }, + + // t.From <= b.From && t.To >= b.From && t.To < b.To + + // |b.From - t.From| = 0 + // |t.To - b.From| = 0 + // |b.To - t.To| = 1 + // + // Target (t): +--+ + // Base (b): +--+--+ + // Result (b - t): +--+ + { + caption: "|b.From - t.From| = 0 && |t.To - b.From| = 0 && |b.To - t.To| = 1", + target: newSymbolNode('0'), + base: newRangeSymbolNode('0', '1'), + result: newSymbolNode('1'), + }, + // |b.From - t.From| = 0 + // |t.To - b.From| = 0 + // |b.To - t.To| > 1 + // + // Target (t): +--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|b.From - t.From| = 0 && |t.To - b.From| = 0 && |b.To - t.To| > 1", + target: newSymbolNode('0'), + base: newRangeSymbolNode('0', '2'), + result: newRangeSymbolNode('1', '2'), + }, + // |b.From - t.From| = 0 + // |t.To - b.From| > 0 + // |b.To - t.To| = 1 + // + // Target (t): +--+--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+ + { + caption: "|b.From - t.From| = 0 && |t.To - b.From| > 0 && |b.To - t.To| = 1", + target: newRangeSymbolNode('0', '1'), + base: newRangeSymbolNode('0', '2'), + result: newSymbolNode('2'), + }, + // |b.From - t.From| = 0 + // |t.To - b.From| > 0 + // |b.To - t.To| > 1 + // + // Target (t): +--+--+ + // Base (b): +--+--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|b.From - t.From| = 0 && |t.To - b.From| > 0 && |b.To - t.To| > 1", + target: newRangeSymbolNode('0', '1'), + base: newRangeSymbolNode('0', '3'), + result: newRangeSymbolNode('2', '3'), + }, + // |b.From - t.From| > 0 + // |t.To - b.From| = 0 + // |b.To - t.To| = 1 + // + // Target (t): +--+--+ + // Base (b): +--+--+ + // Result (b - t): +--+ + { + caption: "|b.From - t.From| > 0 && |t.To - b.From| = 0 && |b.To - t.To| = 1", + target: newRangeSymbolNode('0', '1'), + base: newRangeSymbolNode('1', '2'), + result: newSymbolNode('2'), + }, + // |b.From - t.From| > 0 + // |t.To - b.From| = 0 + // |b.To - t.To| > 1 + // + // Target (t): +--+--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|b.From - t.From| > 0 && |t.To - b.From| = 0 && |b.To - t.To| > 1", + target: newRangeSymbolNode('0', '1'), + base: newRangeSymbolNode('1', '3'), + result: newRangeSymbolNode('2', '3'), + }, + // |b.From - t.From| > 0 + // |t.To - b.From| > 0 + // |b.To - t.To| = 1 + // + // Target (t): +--+--+--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+ + { + caption: "|b.From - t.From| > 0 && |t.To - b.From| > 0 && |b.To - t.To| = 1", + target: newRangeSymbolNode('0', '2'), + base: newRangeSymbolNode('1', '3'), + result: newSymbolNode('3'), + }, + // |b.From - t.From| > 0 + // |t.To - b.From| > 0 + // |b.To - t.To| > 1 + // + // Target (t): +--+--+--+ + // Base (b): +--+--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|b.From - t.From| > 0 && |t.To - b.From| > 0 && |b.To - t.To| > 1", + target: newRangeSymbolNode('0', '2'), + base: newRangeSymbolNode('1', '4'), + result: newRangeSymbolNode('3', '4'), + }, + + // t.From > b.From && t.From <= b.To && t.To >= b.To + + // |t.From - b.From| = 1 + // |b.To - t.From| = 0 + // |t.To - b.To| = 0 + // + // Target (t): +--+ + // Base (b): +--+--+ + // Result (b - t): +--+ + { + caption: "|t.From - b.From| = 1 && |b.To - t.From| = 0 && |t.To - b.To| = 0", + target: newSymbolNode('1'), + base: newRangeSymbolNode('0', '1'), + result: newSymbolNode('0'), + }, + // |t.From - b.From| = 1 + // |b.To - t.From| = 0 + // |t.To - b.To| > 0 + // + // Target (t): +--+--+ + // Base (b): +--+--+ + // Result (b - t): +--+ + { + caption: "|t.From - b.From| = 1 && |b.To - t.From| = 0 && |t.To - b.To| > 0", + target: newRangeSymbolNode('1', '2'), + base: newRangeSymbolNode('0', '1'), + result: newSymbolNode('0'), + }, + // |t.From - b.From| = 1 + // |b.To - t.From| > 0 + // |t.To - b.To| = 0 + // + // Target (t): +--+--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+ + { + caption: "|t.From - b.From| = 1 && |b.To - t.From| > 0 && |t.To - b.To| = 0", + target: newRangeSymbolNode('1', '2'), + base: newRangeSymbolNode('0', '2'), + result: newSymbolNode('0'), + }, + // |t.From - b.From| = 1 + // |b.To - t.From| > 0 + // |t.To - b.To| > 0 + // + // Target (t): +--+--+--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+ + { + caption: "|t.From - b.From| = 1 && |b.To - t.From| > 0 && |t.To - b.To| > 0", + target: newRangeSymbolNode('1', '3'), + base: newRangeSymbolNode('0', '2'), + result: newSymbolNode('0'), + }, + // |t.From - b.From| > 1 + // |b.To - t.From| = 0 + // |t.To - b.To| = 0 + // + // Target (t): +--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|t.From - b.From| > 1 && |b.To - t.From| = 0 && |t.To - b.To| = 0", + target: newSymbolNode('2'), + base: newRangeSymbolNode('0', '2'), + result: newRangeSymbolNode('0', '1'), + }, + // |t.From - b.From| > 1 + // |b.To - t.From| = 0 + // |t.To - b.To| > 0 + // + // Target (t): +--+--+ + // Base (b): +--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|t.From - b.From| > 1 && |b.To - t.From| = 0 && |t.To - b.To| > 0", + target: newRangeSymbolNode('2', '3'), + base: newRangeSymbolNode('0', '2'), + result: newRangeSymbolNode('0', '1'), + }, + // |t.From - b.From| > 1 + // |b.To - t.From| > 0 + // |t.To - b.To| = 0 + // + // Target (t): +--+--+ + // Base (b): +--+--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|t.From - b.From| > 1 && |b.To - t.From| > 0 && |t.To - b.To| = 0", + target: newRangeSymbolNode('2', '3'), + base: newRangeSymbolNode('0', '3'), + result: newRangeSymbolNode('0', '1'), + }, + // |t.From - b.From| > 1 + // |b.To - t.From| > 0 + // |t.To - b.To| > 0 + // + // Target (t): +--+--+--+ + // Base (b): +--+--+--+--+ + // Result (b - t): +--+--+ + { + caption: "|t.From - b.From| > 1 && |b.To - t.From| > 0 && |t.To - b.To| > 0", + target: newRangeSymbolNode('2', '4'), + base: newRangeSymbolNode('0', '3'), + result: newRangeSymbolNode('0', '1'), + }, + + // t.From <= b.From && t.To >= b.To + + // |b.From - t.From| = 0 + // |t.To - b.To| = 0 + // + // Target (t): +--+ + // Base (b): +--+ + // Result (b - t): N/A + { + caption: "|b.From - t.From| = 0 && |t.To - b.To| = 0", + target: newSymbolNode('0'), + base: newSymbolNode('0'), + result: nil, + }, + // |b.From - t.From| = 0 + // |t.To - b.To| > 0 + // + // Target (t): +--+--+ + // Base (b): +--+ + // Result (b - t): N/A + { + caption: "|b.From - t.From| = 0 && |t.To - b.To| > 0", + target: newRangeSymbolNode('0', '1'), + base: newSymbolNode('0'), + result: nil, + }, + // |b.From - t.From| > 0 + // |t.To - b.To| = 0 + // + // Target (t): +--+--+ + // Base (b): +--+ + // Result (b - t): N/A + { + caption: "|b.From - t.From| > 0 && |t.To - b.To| = 0", + target: newRangeSymbolNode('0', '1'), + base: newSymbolNode('1'), + result: nil, + }, + // |b.From - t.From| > 0 + // |t.To - b.To| > 0 + // + // Target (t): +--+--+--+ + // Base (b): +--+ + // Result (b - t): N/A + { + caption: "|b.From - t.From| > 0 && |t.To - b.To| > 0", + target: newRangeSymbolNode('0', '2'), + base: newSymbolNode('1'), + result: nil, + }, + + // Others + + // |b.From - t.From| = 1 + // + // Target (t): +--+ + // Base (b): +--+ + // Result (b - t): +--+ + { + caption: "|b.From - t.From| = 1", + target: newSymbolNode('0'), + base: newSymbolNode('1'), + result: newSymbolNode('1'), + }, + // |b.From - t.From| > 1 + // + // Target (t): +--+ + // Base (b): +--+ + // Result (b - t): +--+ + { + caption: "|b.From - t.From| > 1", + target: newSymbolNode('0'), + base: newSymbolNode('2'), + result: newSymbolNode('2'), + }, + // |t.To - b.To| = 1 + // + // Target (t): +--+ + // Base (b): +--+ + // Result (b - t): +--+ + { + caption: "|t.To - b.To| = 1", + target: newSymbolNode('1'), + base: newSymbolNode('0'), + result: newSymbolNode('0'), + }, + // |t.To - b.To| > 1 + // + // Target (t): +--+ + // Base (b): +--+ + // Result (b - t): +--+ + { + caption: "|t.To - b.To| > 1", + target: newSymbolNode('2'), + base: newSymbolNode('0'), + result: newSymbolNode('0'), + }, + } { + t.Run(test.caption, func(t *testing.T) { + r := exclude(test.target, test.base) + testAST(t, test.result, r) + }) + } +} + +func testAST(t *testing.T, expected, actual CPTree) { + t.Helper() + + aTy := reflect.TypeOf(actual) + eTy := reflect.TypeOf(expected) + if eTy != aTy { + t.Fatalf("unexpected node: want: %+v, got: %+v", eTy, aTy) + } + + if actual == nil { + return + } + + switch e := expected.(type) { + case *symbolNode: + a := actual.(*symbolNode) + if a.From != e.From || a.To != e.To { + t.Fatalf("unexpected node: want: %+v, got: %+v", e, a) + } + } + eLeft, eRight := expected.children() + aLeft, aRight := actual.children() + testAST(t, eLeft, aLeft) + testAST(t, eRight, aRight) +} |