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fix: make SimpleConfigObject.keySet() unmodifiable #848

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fix: make SimpleConfigObject.keySet() unmodifiable #848

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2 changes: 1 addition & 1 deletion config/src/main/java/com/typesafe/config/impl/SimpleConfigObject.java
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Original file line number Diff line number Diff line change
Expand Up @@ -606,7 +606,7 @@ public boolean containsKey(Object key) {

@Override
public Set<String> keySet() {
return value.keySet();
return Collections.unmodifiableSet(value.keySet());
}

@Override
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2 changes: 2 additions & 0 deletions config/src/test/scala/com/typesafe/config/impl/ConfigValueTest.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -491,6 +491,8 @@ class ConfigValueTest extends TestUtils {
unsupported { m.put("hello", intValue(42)) }
unsupported { m.putAll(Collections.emptyMap[String, AbstractConfigValue]()) }
unsupported { m.remove("a") }
unsupported { m.keySet().remove("a") }
unsupported { m.keySet().clear() }
}

@Test
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