mutator: Represent `Map` as `LinkedHashMap`

This ensures that the iteration order and thus the mutations applied to
the map are deterministic.

Some tests had to be adjusted - they were potentially flaky as they
dependend on the previously unspecified iteration order.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/test/java/com/code_intelligence/jazzer/mutation/mutator/collection/MapMutatorTest.java b/src/test/java/com/code_intelligence/jazzer/mutation/mutator/collection/MapMutatorTest.java
index 10cd8e97..a5b4e4d8 100644
--- a/src/test/java/com/code_intelligence/jazzer/mutation/mutator/collection/MapMutatorTest.java
+++ b/src/test/java/com/code_intelligence/jazzer/mutation/mutator/collection/MapMutatorTest.java
@@ -83,7 +83,7 @@ class MapMutatorTest {
              // Mutate entry
              false,
              // Index
-             0,
+             1,
              // Mutate value
              false)) {
       map = mutator.mutate(map, prng);
@@ -154,7 +154,7 @@ class MapMutatorTest {
       map = mutator.mutate(map, prng);
     }
     assertThat(map).hasSize(2);
-    assertThat(map).containsKey("Key2");
+    assertThat(map).containsKey("Key1");
     assertThat(map).containsKey("New");
   }
 }