(commons-collections) branch master updated: Add MapUtilsTest.testInvertMapDefault()

[ggregory]

This is an automated email from the ASF dual-hosted git repository.

ggregory pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-collections.git


The following commit(s) were added to refs/heads/master by this push:
     new 5bbadab33 Add MapUtilsTest.testInvertMapDefault()
5bbadab33 is described below

commit 5bbadab330e0f645f5c8176a631248906785824c
Author: Gary D. Gregory <garydgreg...@gmail.com>
AuthorDate: Thu Oct 16 15:45:46 2025 -0400

    Add MapUtilsTest.testInvertMapDefault()
---
 .../org/apache/commons/collections4/MapUtilsTest.java  | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java 
b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
index 0dbeed254..51b71a6a2 100644
--- a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
@@ -628,24 +628,25 @@ class MapUtilsTest {
 
     @Test
     void testInvertMap() {
-        final Map<String, String> in = new HashMap<>(5, 1);
+        testInvertMap(new HashMap<>(5, 1));
+    }
+
+    private void testInvertMap(final Map<String, String> in) {
+        // setup
         in.put("1", "A");
         in.put("2", "B");
         in.put("3", "C");
         in.put("4", "D");
         in.put("5", "E");
-
         final Set<String> inKeySet = new HashSet<>(in.keySet());
         final Set<String> inValSet = new HashSet<>(in.values());
-
+        // invert
         final Map<String, String> out = MapUtils.invertMap(in);
-
+        // assert
         final Set<String> outKeySet = new HashSet<>(out.keySet());
         final Set<String> outValSet = new HashSet<>(out.values());
-
         assertEquals(inKeySet, outValSet);
         assertEquals(inValSet, outKeySet);
-
         assertEquals("1", out.get("A"));
         assertEquals("2", out.get("B"));
         assertEquals("3", out.get("C"));
@@ -653,6 +654,11 @@ class MapUtilsTest {
         assertEquals("5", out.get("E"));
     }
 
+    @Test
+    void testInvertMapDefault() {
+        testInvertMap(new HashMap<>());
+    }
+
     @Test
     void testInvertMapNull() {
         final Map<String, String> nullMap = null;