Added numeric range tests

re_test.go

@@ -479,7 +479,35 @@ var reTests = []struct {
 	{`*?`, nil, `-`, nil},
 	{`a*?`, nil, `-`, nil}, // non-greedy operators are not supported
 
-	// Todo - add numeric range tests
+	// Numeric range tests - this is a feature that I added, and doesn't exist
+	// in any other mainstream regex engine
+	{`<0-255>`, nil, `0`, []Group{{0, 1}}},
+	{`<0-255>`, nil, `7`, []Group{{0, 1}}},
+	{`<0-255>`, nil, `46`, []Group{{0, 2}}},
+	{`<0-255>`, nil, `90`, []Group{{0, 2}}},
+	{`<0-255>`, nil, `107`, []Group{{0, 3}}},
+	{`<0-255>`, nil, `198`, []Group{{0, 3}}},
+	{`<0-255>`, nil, `254`, []Group{{0, 3}}},
+	{`<0-255>`, nil, `255`, []Group{{0, 3}}},
+	{`<0-255>`, nil, `256`, []Group{{0, 2}, {2, 3}}},
+	{`^<0-255>$`, nil, `256`, []Group{}},
+
+	{`^<0-299792458>$`, nil, `299000999`, []Group{{0, 9}}},
+	{`^<0-299792458>$`, nil, `299792531`, []Group{}},
+
+	{`^<3-0>$`, nil, `-`, nil},
+	{`^<0-0>$`, nil, `0`, []Group{{0, 1}}},
+	{`2<0-55>`, nil, `231`, []Group{{0, 3}}},
+	{`2<0-55>`, nil, `271`, []Group{{0, 2}}},
+	{`^2<0-55>$`, nil, `271`, []Group{}},
+
+	{`<389`, nil, `-`, nil},
+	{`<389>`, nil, `-`, nil},
+	{`<-389>`, nil, `-`, nil},
+	{`<389->`, nil, `-`, nil},
+	{`<389-400`, nil, `-`, nil},
+	{`<389-400>`, nil, `391`, []Group{{0, 3}}},
+	{`\b<1-10000>\b`, nil, `America declared independence in 1776.`, []Group{{33, 37}}},
 }
 
 var groupTests = []struct {
@@ -634,6 +662,8 @@ var groupTests = []struct {
 	{`^([ab]*)(?=(b)?)c`, nil, `abc`, []Match{[]Group{{0, 3}, {0, 2}}}},
 	{`^([ab]*)(?!(b))c`, nil, `abc`, []Match{[]Group{{0, 3}, {0, 2}}}},
 	{`^([ab]*)(?<!(a))c`, nil, `abc`, []Match{[]Group{{0, 3}, {0, 2}}}},
+
+	{`(<389-400>)`, nil, `391`, []Match{[]Group{{0, 3}, {0, 3}}}},
 }
 
 func TestFindAllMatches(t *testing.T) {