examples demonstrating websocket path mapping issue

Signed-off-by: Lachlan Roberts <lachlan@webtide.com>

jetty-websocket/websocket-servlet/src/test/java/org/eclipse/jetty/websocket/servlet/WebSocketUriMappingTest.java

@@ -0,0 +1,128 @@
+package org.eclipse.jetty.websocket.servlet;
+
+import org.eclipse.jetty.http.pathmap.MappedResource;
+import org.eclipse.jetty.http.pathmap.PathMappings;
+import org.eclipse.jetty.http.pathmap.UriTemplatePathSpec;
+import org.junit.jupiter.api.Test;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class WebSocketUriMappingTest
+{
+    private PathMappings<String> mapping = new PathMappings<>();
+
+    private String getMatch(String pathSpecString)
+    {
+        MappedResource<String> resource = mapping.getMatch(pathSpecString);
+        return resource == null ? null : resource.getResource();
+    }
+
+    @Test
+    public void testJsrExampleI()
+    {
+        mapping.put("/a/b", "endpointA");
+
+        assertThat(getMatch("/a/b"), is("endpointA"));
+        assertNull(getMatch("/a/c"));
+    }
+
+    @Test
+    public void testJsrExampleII()
+    {
+        mapping.put(new UriTemplatePathSpec("/a/{var}"), "endpointA");
+
+        assertThat(getMatch("/a/b"), is("endpointA"));
+        assertThat(getMatch("/a/apple"), is("endpointA"));
+        assertNull(getMatch("/a"));
+        assertNull(getMatch("/a/b/c"));
+    }
+
+    @Test
+    public void testJsrExampleIII()
+    {
+        mapping.put(new UriTemplatePathSpec("/a/{var}/c"), "endpointA");
+        mapping.put(new UriTemplatePathSpec("/a/b/c"), "endpointB");
+        mapping.put(new UriTemplatePathSpec("/a/{var1}/{var2}"), "endpointC");
+
+        assertThat(getMatch("/a/b/c"), is("endpointB"));
+        assertThat(getMatch("/a/d/c"), is("endpointA"));
+        assertThat(getMatch("/a/x/y"), is("endpointC"));
+    }
+
+    @Test
+    public void testJsrExampleIV()
+    {
+        mapping.put(new UriTemplatePathSpec("/{var1}/d"), "endpointA");
+        mapping.put(new UriTemplatePathSpec("/b/{var2}"), "endpointB");
+
+        assertThat(getMatch("/b/d"), is("endpointB"));
+    }
+
+    @Test
+    public void testPrefixVsSuffix()
+    {
+        mapping.put(new UriTemplatePathSpec("/{a}/b"), "suffix");
+        mapping.put(new UriTemplatePathSpec("/{a}/{b}"), "prefix");
+
+        assertThat(getMatch("/a/b"), is("suffix"));
+    }
+
+    @Test
+    public void testMiddleVsSuffix()
+    {
+        mapping.put(new UriTemplatePathSpec("/a/{b}/c"), "middle");
+        mapping.put(new UriTemplatePathSpec("/a/b/{c}"), "suffix");
+
+        assertThat(getMatch("/a/b/c"), is("suffix"));
+    }
+
+    @Test
+    public void testMiddleVsSuffix2()
+    {
+        mapping.put(new UriTemplatePathSpec("/{a}/b/{c}"), "middle");
+        mapping.put(new UriTemplatePathSpec("/{a}/b/c"), "suffix");
+
+        assertThat(getMatch("/a/b/c"), is("suffix"));
+    }
+
+    @Test
+    public void testMiddleVsPrefix()
+    {
+        mapping.put(new UriTemplatePathSpec("/a/{b}/{c}/d"), "middle");
+        mapping.put(new UriTemplatePathSpec("/a/b/c/{d}"), "prefix");
+
+        assertThat(getMatch("/a/b/c/d"), is("prefix"));
+    }
+
+    @Test
+    public void testMiddleVsMiddle()
+    {
+        // This works but only because its an alphabetical check and '{' > 'c'.
+        mapping.put(new UriTemplatePathSpec("/a/{b}/{c}/d"), "middle1");
+        mapping.put(new UriTemplatePathSpec("/a/{b}/c/d"), "middle2");
+
+        assertThat(getMatch("/a/b/c/d"), is("middle2"));
+    }
+
+    @Test
+    public void testPrefixVsPrefix()
+    {
+        // This works but only because its an alphabetical check and '{' > 'b'.
+        mapping.put(new UriTemplatePathSpec("/a/{b}/{c}"), "prefix1");
+        mapping.put(new UriTemplatePathSpec("/a/b/{c}"), "prefix2");
+
+        assertThat(getMatch("/a/b/c"), is("prefix2"));
+    }
+
+    @Test
+    public void testSuffixVsSuffix()
+    {
+        // This works but only because its an alphabetical check and '{' > 'b'.
+        mapping.put(new UriTemplatePathSpec("/{a}/{b}/c"), "suffix1");
+        mapping.put(new UriTemplatePathSpec("/{a}/b/c"), "suffix2");
+
+        assertThat(getMatch("/a/b/c"), is("suffix2"));
+    }
+}