Tests for handling null maps/collections #13
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WalkthroughThe changes involve enhancing test coverage and object comparison capabilities for the Changes
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Actionable comments posted: 1
🧹 Nitpick comments (4)
pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/CodeGeneratorImplTest.java (2)
1433-1453: Well-structured test for null handling!The test comprehensively verifies that null collections and maps are preserved during serialization/deserialization. Consider renaming the test to better reflect its specific purpose, e.g.,
testNullFieldsPreservedDuringSerialization.
1456-1468: Clarify the test name and purpose.While the test provides good coverage of null handling through direct handler access, the name "ForMissingHandlers" is unclear as the test doesn't appear to be testing missing handler scenarios. Consider:
- Renaming the test to better reflect its purpose (e.g.,
testNullFieldsPreservedWithDirectHandlerAccess)- Adding a comment explaining why testing through direct handler access is necessary
pibify-maven-plugin/src/test/java/com/flipkart/pibify/test/data/ClassWithNativeCollections.java (2)
135-138: Consider improving hashCode() implementation.While the implementation is functionally correct, consider these improvements:
- Use Arrays.hashCode() for byte arrays in listOfBytes
- Cache the hash value for better performance since the fields are immutable (based on the class usage in tests)
+ private int hash; // Cache hash code + @Override public int hashCode() { - return Objects.hash(aString, anInt, aMap, listOfBytes, anotherMap, anotherString); + if (hash == 0) { // Only calculate hash once + int result = Objects.hash(aString, anInt, aMap, anotherMap, anotherString); + if (listOfBytes != null) { + for (byte[] bytes : listOfBytes) { + result = 31 * result + Arrays.hashCode(bytes); + } + } + hash = result; + } + return hash; }
140-154: Improve the list comparison helper method.The implementation is functionally correct but could be improved:
- Make the method private as it's only used internally
- Rename to be more specific (e.g.,
compareListOfBytes)- Remove unnecessary blank lines
- Consider using Java 8+ features for a more concise implementation
- // compare to list of arrays - public boolean listEquals(List<byte[]> listOfBytes) { - - if (this.listOfBytes == null && listOfBytes != null) return false; - - if (this.listOfBytes != null && listOfBytes == null) return false; - - if (this.listOfBytes == null) return true; - - if (this.listOfBytes.size() != listOfBytes.size()) return false; - for (int i = 0; i < this.listOfBytes.size(); i++) { - if (!Arrays.equals(this.listOfBytes.get(i), listOfBytes.get(i))) return false; - } - return true; + private boolean compareListOfBytes(List<byte[]> other) { + if (this.listOfBytes == null) { + return other == null; + } + if (other == null || this.listOfBytes.size() != other.size()) { + return false; + } + return IntStream.range(0, this.listOfBytes.size()) + .allMatch(i -> Arrays.equals(this.listOfBytes.get(i), other.get(i))); }
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📒 Files selected for processing (2)
pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/CodeGeneratorImplTest.java(3 hunks)pibify-maven-plugin/src/test/java/com/flipkart/pibify/test/data/ClassWithNativeCollections.java(2 hunks)
🔇 Additional comments (3)
pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/CodeGeneratorImplTest.java (1)
286-286: Good simplification of the test assertion!Using object equality instead of field-by-field comparison makes the test more maintainable and readable.
pibify-maven-plugin/src/test/java/com/flipkart/pibify/test/data/ClassWithNativeCollections.java (2)
29-29: LGTM!The Objects import is correctly added and necessary for the new equality and hashing implementations.
128-154: Verify comprehensive null handling across all collection fields.The implementation handles nulls for
listOfBytes, but let's verify the behavior for other collection fields. Run this test to ensure consistent null handling:Also, consider adding explicit test cases for:
- All fields being null
- Mixed null and non-null fields
- Comparing with instances having different null patterns
| @Override | ||
| public boolean equals(Object o) { | ||
| if (!(o instanceof ClassWithNativeCollections)) return false; | ||
| ClassWithNativeCollections that = (ClassWithNativeCollections) o; | ||
| return Objects.equals(aString, that.aString) && Objects.equals(anInt, that.anInt) && Objects.equals(aMap, that.aMap) && this.listEquals(that.listOfBytes) && Objects.equals(anotherMap, that.anotherMap) && Objects.equals(anotherString, that.anotherString); | ||
| } |
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🛠️ Refactor suggestion
Improve equals() implementation to follow best practices.
The current implementation has several issues:
- Missing null check before instanceof
- Not following complete equals() contract (self-comparison optimization)
- Poor readability due to long line
Consider this improved implementation:
@Override
public boolean equals(Object o) {
- if (!(o instanceof ClassWithNativeCollections)) return false;
+ if (this == o) return true;
+ if (o == null || getClass() != o.getClass()) return false;
ClassWithNativeCollections that = (ClassWithNativeCollections) o;
- return Objects.equals(aString, that.aString) && Objects.equals(anInt, that.anInt) && Objects.equals(aMap, that.aMap) && this.listEquals(that.listOfBytes) && Objects.equals(anotherMap, that.anotherMap) && Objects.equals(anotherString, that.anotherString);
+ return Objects.equals(aString, that.aString)
+ && Objects.equals(anInt, that.anInt)
+ && Objects.equals(aMap, that.aMap)
+ && listEquals(that.listOfBytes)
+ && Objects.equals(anotherMap, that.anotherMap)
+ && Objects.equals(anotherString, that.anotherString);
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| @Override | |
| public boolean equals(Object o) { | |
| if (!(o instanceof ClassWithNativeCollections)) return false; | |
| ClassWithNativeCollections that = (ClassWithNativeCollections) o; | |
| return Objects.equals(aString, that.aString) && Objects.equals(anInt, that.anInt) && Objects.equals(aMap, that.aMap) && this.listEquals(that.listOfBytes) && Objects.equals(anotherMap, that.anotherMap) && Objects.equals(anotherString, that.anotherString); | |
| } | |
| @Override | |
| public boolean equals(Object o) { | |
| if (this == o) return true; | |
| if (o == null || getClass() != o.getClass()) return false; | |
| ClassWithNativeCollections that = (ClassWithNativeCollections) o; | |
| return Objects.equals(aString, that.aString) | |
| && Objects.equals(anInt, that.anInt) | |
| && Objects.equals(aMap, that.aMap) | |
| && listEquals(that.listOfBytes) | |
| && Objects.equals(anotherMap, that.anotherMap) | |
| && Objects.equals(anotherString, that.anotherString); | |
| } |
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