Add method to return resource directory contents

In order to avoid hard coding the policy types and policies that are in
the example directories into unit test cases, and in order to
automatically pick up added and removed policy types and policies, it
would be good to read the contents of resource directories at run time
in unit tests. This change brings in that functionality into
ResourceUtils.

Issue-ID: POLICY-2315
Change-Id: I601718828aad0f065dbbaa1f5af8d0a0f133f44d
Signed-off-by: liamfallon <liam.fallon@est.tech>

1 files changed, 42 insertions, 7 deletions

diff --git a/utils/src/test/java/org/onap/policy/common/utils/resources/ResourceUtilsTest.java b/utils/src/test/java/org/onap/policy/common/utils/resources/ResourceUtilsTest.java
index 4b2b007b..2991009f 100644
--- a/utils/src/test/java/org/onap/policy/common/utils/resources/ResourceUtilsTest.java
+++ b/utils/src/test/java/org/onap/policy/common/utils/resources/ResourceUtilsTest.java
@@ -2,6 +2,7 @@
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2018 Ericsson. All rights reserved.
  *  Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ *  Modifications Copyright (C) 2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,7 +31,9 @@ import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.MalformedURLException;
 import java.net.URL;
+import java.util.Set;
 
 import org.junit.After;
 import org.junit.Before;
@@ -76,6 +79,15 @@ public class ResourceUtilsTest {
     }
 
     /**
+     * Cleandown resource utils test.
+     */
+    @After
+    public void cleandownResourceUtilsTest() {
+        tmpEmptyFile.delete();
+        tmpUsedFile.delete();
+    }
+
+    /**
      * Test get url resource.
      */
     @Test
@@ -298,14 +310,37 @@ public class ResourceUtilsTest {
         assertNull(ResourceUtils.getFilePath4Resource(null));
         assertEquals("/something/else", ResourceUtils.getFilePath4Resource("/something/else"));
         assertTrue(ResourceUtils.getFilePath4Resource("xml/example.xml").endsWith("xml/example.xml"));
+        assertTrue(ResourceUtils.getFilePath4Resource("com/google").endsWith("com/google"));
     }
 
-    /**
-     * Cleandown resource utils test.
-     */
-    @After
-    public void cleandownResourceUtilsTest() {
-        tmpEmptyFile.delete();
-        tmpUsedFile.delete();
+    @Test
+    public void testGetDirectoryContents() throws MalformedURLException {
+        assertTrue(ResourceUtils.getDirectoryContents(null).isEmpty());
+        assertTrue(ResourceUtils.getDirectoryContents("idontexist").isEmpty());
+        assertTrue(ResourceUtils.getDirectoryContents("logback-test.xml").isEmpty());
+
+        Set<String> resultD0 = ResourceUtils.getDirectoryContents("testdir");
+        assertEquals(1, resultD0.size());
+        assertEquals("testdir/testfile.xml", resultD0.iterator().next());
+
+        Set<String> resultD1 = ResourceUtils.getDirectoryContents("org/onap/policy/common");
+        assertTrue(resultD1.size() > 0);
+        assertEquals("org/onap/policy/common/utils/", resultD1.iterator().next());
+
+        Set<String> resultD2 = ResourceUtils.getDirectoryContents("org/onap/policy/common/utils/coder");
+        assertTrue(resultD2.size() >= 15);
+        assertEquals("org/onap/policy/common/utils/coder/CoderExceptionTest.class", resultD2.iterator().next());
+
+        Set<String> resultJ0 = ResourceUtils.getDirectoryContents("com");
+        assertEquals(189, resultJ0.size());
+        assertEquals("com/google/", resultJ0.iterator().next());
+
+        Set<String> resultJ1 = ResourceUtils.getDirectoryContents("com/google/gson/util");
+        assertEquals(1, resultJ1.size());
+        assertEquals("com/google/gson/util/VersionUtils.class", resultJ1.iterator().next());
+
+        URL dummyUrl = new URL("http://even/worse");
+        assertTrue(ResourceUtils.getDirectoryContentsJar(dummyUrl, "nonexistantdirectory").isEmpty());
+
     }
 }