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Added grouping tests

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This commit is contained in:
Aadhavan Srinivasan
2024-12-11 00:16:35 -05:00
parent 437ca2ee57
commit 84cccc73ec
1 changed files with 41 additions and 0 deletions
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41
re_test.go
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@@ -156,6 +156,28 @@ var reTests = []struct {
{"(?<=f)f+(?=f)", "fffffa", []Group{{1, 4}}},
}
var groupTests = []struct {
re string
str string
result []Match
}{
{"(a)(b)", "ab", []Match{[]Group{{0, 2}, {0, 1}, {1, 2}}}},
{"((a))(b)", "ab", []Match{[]Group{{0, 2}, {0, 1}, {0, 1}, {1, 2}}}},
{"(0)", "ab", []Match{[]Group{}}},
{"(a)b", "ab", []Match{[]Group{{0, 2}, {0, 1}}}},
{"a(b)", "ab", []Match{[]Group{{0, 2}, {1, 2}}}},
{"(a|b)", "ab", []Match{[]Group{{0, 1}, {0, 1}}, []Group{{1, 2}, {1, 2}}}},
{"(a)|(b)", "ab", []Match{[]Group{{0, 1}, {0, 1}, {-1, -1}}, []Group{{1, 2}, {-1, -1}, {1, 2}}}},
{"(a+)(a)", "aaaa", []Match{[]Group{{0, 4}, {0, 3}, {3, 4}}}},
{"(a+)|(a)", "aaaa", []Match{[]Group{{0, 4}, {0, 4}, {-1, -1}}}},
{"(a+)(aa)", "aaaa", []Match{[]Group{{0, 4}, {0, 2}, {2, 4}}}},
{"(aaaa)|(aaaa)", "aaaa", []Match{[]Group{{0, 4}, {0, 4}, {-1, -1}}}},
{"(aaa)|(aaaa)", "aaaa", []Match{[]Group{{0, 4}, {-1, -1}, {0, 4}}}},
{"(aaa)|(aaaa)", "aaaa", []Match{[]Group{{0, 4}, {-1, -1}, {0, 4}}}},
{"(aaaa)|(aaa)", "aaaa", []Match{[]Group{{0, 4}, {0, 4}, {-1, -1}}}},
{"(a)|(aa)", "aa", []Match{[]Group{{0, 2}, {-1, -1}, {0, 2}}}},
}
func TestFindAllMatches(t *testing.T) {
for _, test := range reTests {
t.Run(test.re+" "+test.str, func(t *testing.T) {
@@ -172,3 +194,22 @@ func TestFindAllMatches(t *testing.T) {
})
}
}
func TestFindAllGroups(t *testing.T) {
for _, test := range groupTests {
t.Run(test.re+" "+test.str, func(t *testing.T) {
re_postfix := shuntingYard(test.re)
startState, numGroups := thompson(re_postfix)
matchIndices := findAllMatches(startState, []rune(test.str), numGroups)
for i := range matchIndices {
for j := range matchIndices[i] {
if matchIndices[i][j].isValid() {
if test.result[i][j] != matchIndices[i][j] {
t.Errorf("Wanted %v Got %v\n", test.result, matchIndices)
}
}
}
}
})
}
}