1 files changed, 45 insertions, 0 deletions
diff --git a/testutil/src/main/java/com/yahoo/test/CollectionPatternMatcher.java b/testutil/src/main/java/com/yahoo/test/CollectionPatternMatcher.java
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+++ b/testutil/src/main/java/com/yahoo/test/CollectionPatternMatcher.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.test;
+
+import org.hamcrest.BaseMatcher;
+import org.hamcrest.Description;
+import org.hamcrest.Factory;
+import org.hamcrest.Matcher;
+
+import java.util.Collection;
+
+/**
+ * Checks if a collection of strings contains at least one string with the expected regex pattern.
+ *
+ * @author gjoranv
+ * @since 5.1.8
+ */
+public class CollectionPatternMatcher extends BaseMatcher<Collection<String>> {
+
+    private final String pattern;
+
+    public CollectionPatternMatcher(String pattern) {
+        this.pattern = pattern;
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText("contains a string that matches expression '" + pattern + "'");
+    }
+
+    @Override
+    public boolean matches(Object o) {
+        @SuppressWarnings("unchecked")
+        Collection<String> strings = (Collection<String>) o;
+        for (String s : strings)
+            if (s.matches(pattern))
+                return true;
+        return false;
+    }
+
+    @Factory
+    public static <T> Matcher<Collection<String>> containsStringWithPattern(String pattern) {
+        return new CollectionPatternMatcher(pattern);
+    }
+
+}