Move test cases to their own directory to avoid conflict

java/ql/test/library-tests/regex/parser/Test.java

@@ -0,0 +1,28 @@
+import java.util.regex.Pattern;
+
+class Test {
+    static String[] regs = {
+        "[A-Z\\d]++",
+        "\\Q hello world [ *** \\Q ) ( \\E",
+        "[\\Q hi ] \\E]",
+        "[]]",
+        "[^]]",
+        "[abc[defg]]",
+        "[abc&&[\\W\\p{Lower}\\P{Space}\\N{degree sign}]]\\b7\\b{g}8",
+        "\\cA",
+        "\\c(",
+        "\\c\\(ab)",
+        "(?>hi)(?<name>hell*?o*+)123\\k<name>",
+        "a+b*c?d{2}e{3,4}f{,5}g{6,}h+?i*?j??k{7}?l{8,9}?m{,10}?n{11,}?o++p*+q?+r{12}+s{13,14}+t{,15}+u{16,}+",
+        "(?i)(?=a)(?!b)(?<=c)(?<!d)",
+        "a||b|c(d|e|)f|g",
+        "\\018\\033\\0377\\0777\u1337",
+
+    };
+
+    void test() {
+        for (int i = 0; i < regs.length; i++) {
+            Pattern.compile(regs[i]);
+        }
+    }
+}