From 8feaefeeb8901adb6c73be185aeeef4a05ea9589 Mon Sep 17 00:00:00 2001
From: Aadhavan Srinivasan <aadhavan@twomorecents.org>
Date: Sat, 25 Jan 2025 22:36:04 -0500
Subject: [PATCH] Added more tests

---
 re_test.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/re_test.go b/re_test.go
index 6730a04..2583501 100644
--- a/re_test.go
+++ b/re_test.go
@@ -265,6 +265,21 @@ var reTests = []struct {
 	{`\By\B`, nil, `xyz`, []Group{{1, 2}}},
 	{`ab|cd`, nil, `abc`, []Group{{0, 2}}},
 	{`ab|cd`, nil, `abcd`, []Group{{0, 2}, {2, 4}}},
+	{`$b`, nil, `b`, []Group{}},
+	{`a\(b`, nil, `a(b`, []Group{{0, 3}}},
+	{`a\(*b`, nil, `ab`, []Group{{0, 2}}},
+	{`a\(*b`, nil, `a((b`, []Group{{0, 4}}},
+	{`a\\b`, nil, `a\b`, []Group{{0, 3}}},
+	{`a+b+c`, nil, `aabbabc`, []Group{{4, 7}}},
+	{`)(`, nil, `-`, nil},
+	{`[^ab]*`, nil, `cde`, []Group{{0, 3}, {3, 3}}},
+	{`abc`, nil, ``, []Group{}},
+	{`a*`, nil, ``, []Group{{0, 0}}},
+	{`a|b|c|d|e`, nil, `e`, []Group{{0, 1}}},
+	{`abcd*efg`, nil, `abcdefg`, []Group{{0, 7}}},
+	{`ab*`, nil, `xabyabbbz`, []Group{{1, 3}, {4, 8}}},
+	{`ab*`, nil, `xayabbbz`, []Group{{1, 2}, {3, 7}}},
+	{`[abhgefdc]ij`, nil, `hij`, []Group{{0, 3}}},
 
 	// Todo - add numeric range tests
 }
@@ -294,10 +309,21 @@ var groupTests = []struct {
 	{"(a?)a?", nil, "ab", []Match{[]Group{{0, 1}, {0, 1}}, []Group{{1, 1}, {1, 1}}, []Group{{2, 2}, {2, 2}}}},
 	{"(a?)a?", nil, "aa", []Match{[]Group{{0, 2}, {0, 1}}, []Group{{2, 2}, {2, 2}}}},
 	{"a((b.d){3})", nil, "abfdbhdbid", []Match{[]Group{{0, 10}, {1, 10}, {7, 10}}}},
+
+	// Test cases from Python's RE test suite
 	{`(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)\071`, nil, `abcdefghijkl9`, []Match{[]Group{{0, 13}, {0, 1}, {1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 6}, {6, 7}, {7, 8}, {8, 9}, {9, 10}, {10, 11}, {11, 12}}}},
 	{`()ef`, nil, `def`, []Match{[]Group{{1, 3}, {1, 1}}}},
 	{`(?:)ef`, nil, `def`, []Match{[]Group{{1, 3}}}},
 	{`(?:)`, nil, `def`, []Match{[]Group{{0, 0}}, []Group{{1, 1}}, []Group{{2, 2}}, []Group{{3, 3}}}},
+	{`((a))`, nil, `abc`, []Match{[]Group{{0, 1}, {0, 1}, {0, 1}}}},
+	{`(a)b(c)`, nil, `abc`, []Match{[]Group{{0, 3}, {0, 1}, {2, 3}}}},
+	{`(a+|b)*`, nil, `ab`, []Match{[]Group{{0, 2}, {1, 2}}, []Group{{2, 2}}}},
+	{`(a+|b)+`, nil, `ab`, []Match{[]Group{{0, 2}, {1, 2}}}},
+	{`(a+|b)?`, nil, `ab`, []Match{[]Group{{0, 1}, {0, 1}}, []Group{{1, 2}, {1, 2}}, []Group{{2, 2}}}},
+	{`(a|b|c|d|e)f`, nil, `ef`, []Match{[]Group{{0, 2}, {0, 1}}}},
+	{`(ab|cd)e`, nil, `abcde`, []Match{[]Group{{2, 5}, {2, 4}}}},
+	{`^(ab|cd)e`, nil, `abcde`, []Match{}},
+	{`(abc|)ef`, nil, `abcdef`, []Match{[]Group{{4, 6}, {4, 4}}}},
 }
 
 func TestFindAllMatches(t *testing.T) {