From e877967a6296a7ba2852d317e47d80adb07dfc29 Mon Sep 17 00:00:00 2001
From: Chris Smowton <smowton@github.com>
Date: Fri, 4 Nov 2022 13:46:01 +0000
Subject: [PATCH] Add test verifying no malformed wildcards result from
 captured type variables with a Collection<? extends ...> type

---
 .../wildcards-and-captured-types/Test.java          | 13 +++++++++++++
 .../wildcards-and-captured-types/test.expected      |  0
 .../wildcards-and-captured-types/test.ql            |  5 +++++
 3 files changed, 18 insertions(+)
 create mode 100644 java/ql/test/library-tests/wildcards-and-captured-types/Test.java
 create mode 100644 java/ql/test/library-tests/wildcards-and-captured-types/test.expected
 create mode 100644 java/ql/test/library-tests/wildcards-and-captured-types/test.ql

diff --git a/java/ql/test/library-tests/wildcards-and-captured-types/Test.java b/java/ql/test/library-tests/wildcards-and-captured-types/Test.java
new file mode 100644
index 00000000000..1696a035fd6
--- /dev/null
+++ b/java/ql/test/library-tests/wildcards-and-captured-types/Test.java
@@ -0,0 +1,13 @@
+import java.util.Collection;
+
+public class Test {
+
+  public Collection<? extends CharSequence> getCollection() {
+    return null;
+  }
+
+  public void test() {
+    this.getCollection().isEmpty();
+  }
+
+}
diff --git a/java/ql/test/library-tests/wildcards-and-captured-types/test.expected b/java/ql/test/library-tests/wildcards-and-captured-types/test.expected
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/java/ql/test/library-tests/wildcards-and-captured-types/test.ql b/java/ql/test/library-tests/wildcards-and-captured-types/test.ql
new file mode 100644
index 00000000000..3e28a2c1d67
--- /dev/null
+++ b/java/ql/test/library-tests/wildcards-and-captured-types/test.ql
@@ -0,0 +1,5 @@
+import java
+
+from Method m, Type t
+where m.getAParamType() = t and t.toString().matches("%? super ? extends%")
+select m, t