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new 10a06104de [VARIANT] Initial integration tests for variant reads
(#8104)
10a06104de is described below
commit 10a06104de7b1573437d3aaba888048c608956e9
Author: Aditya Bhatnagar <[email protected]>
AuthorDate: Wed Aug 13 09:47:50 2025 -0400
[VARIANT] Initial integration tests for variant reads (#8104)
# Which issue does this PR close?
- part of #8084 .
# Rationale for this change
This PR implements comprehensive integration tests for Parquet files
with Variant columns, using the real test data from parquet-testing PR
#[90](https://github.com/apache/parquet-testing/pull/90).
# Are these changes tested?
Yes
If tests are not included in your PR, please explain why (for example,
are they covered by existing tests)?
# Are there any user-facing changes?
No
Thanks to @mprammer
---
parquet/tests/simple_variant_integration.rs | 1253 +++++++++++++++++++++++++++
1 file changed, 1253 insertions(+)
diff --git a/parquet/tests/simple_variant_integration.rs
b/parquet/tests/simple_variant_integration.rs
new file mode 100644
index 0000000000..e379b820f2
--- /dev/null
+++ b/parquet/tests/simple_variant_integration.rs
@@ -0,0 +1,1253 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//! Comprehensive integration tests for Parquet files with Variant columns
+//!
+//! This test harness reads test case definitions from cases.json, loads
expected
+//! Variant values from .variant.bin files, reads Parquet files, converts
StructArray
+//! to VariantArray, and verifies that extracted values match expected results.
+//!
+//! Based on the parquet-testing PR:
https://github.com/apache/parquet-testing/pull/90/files
+//! Inspired by the arrow-go implementation:
https://github.com/apache/arrow-go/pull/455/files
+
+// These tests require the arrow feature
+#![cfg(feature = "arrow")]
+
+use arrow_array::{Array, StructArray};
+use parquet::arrow::arrow_reader::ParquetRecordBatchReaderBuilder;
+use std::{
+ env,
+ error::Error,
+ fs,
+ path::{Path, PathBuf},
+};
+
+/// Test case definition structure matching the format from cases.json
+#[derive(Debug, Clone)]
+struct VariantTestCase {
+ /// Case number (e.g., 1, 2, 4, etc. - note: case 3 is missing)
+ pub case_number: u32,
+ /// Test method name (e.g., "testSimpleArray")
+ pub test: Option<String>,
+ /// Name of the parquet file (e.g., "case-001.parquet")
+ pub parquet_file: String,
+ /// Expected variant binary file (e.g., "case-001_row-0.variant.bin") -
None for error cases
+ pub variant_file: Option<String>,
+ /// Expected error message for negative test cases
+ pub error_message: Option<String>,
+ /// Description of the variant value (for debugging)
+ pub variant_description: Option<String>,
+ /// Whether this test is currently expected to pass
+ pub enabled: bool,
+ /// Test category for grouping and analysis
+ pub test_category: TestCategory,
+}
+
+/// Categories of variant tests for organized validation
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+enum TestCategory {
+ /// Basic primitive type tests
+ Primitives,
+ /// Array-related tests (simple, nested, with errors)
+ Arrays,
+ /// Object-related tests (shredded, partial, with errors)
+ Objects,
+ /// Tests expecting specific error conditions
+ ErrorHandling,
+ /// Schema validation and unshredded variants
+ SchemaValidation,
+ /// Mixed and complex scenarios
+ Complex,
+}
+
+/// Comprehensive test harness for Parquet Variant integration
+struct VariantIntegrationHarness {
+ /// Directory containing shredded_variant test data
+ test_data_dir: PathBuf,
+ /// Parsed test cases from cases.json
+ test_cases: Vec<VariantTestCase>,
+}
+
+impl VariantIntegrationHarness {
+ /// Create a new integration test harness
+ fn new() -> Result<Self, Box<dyn Error>> {
+ let test_data_dir = find_shredded_variant_test_data()?;
+ let test_cases = load_test_cases(&test_data_dir)?;
+
+ println!(
+ "Loaded {} test cases from {}",
+ test_cases.len(),
+ test_data_dir.display()
+ );
+
+ Ok(Self {
+ test_data_dir,
+ test_cases,
+ })
+ }
+
+ /// Run all integration tests
+ fn run_all_tests(&self) -> Result<(), Box<dyn Error>> {
+ println!("Running Parquet Variant Integration Tests");
+ println!("==========================================");
+
+ let mut passed = 0;
+ let mut failed = 0;
+ let mut ignored = 0;
+
+ for test_case in &self.test_cases {
+ if !test_case.enabled {
+ println!(
+ "IGNORED: case-{:03} - {}",
+ test_case.case_number,
+ test_case.test.as_deref().unwrap_or("unknown test")
+ );
+ ignored += 1;
+ continue;
+ }
+
+ match self.run_single_test(test_case) {
+ Ok(()) => {
+ println!(
+ "PASSED: case-{:03} - {}",
+ test_case.case_number,
+ test_case.test.as_deref().unwrap_or("unknown test")
+ );
+ passed += 1;
+ }
+ Err(e) => {
+ println!(
+ "FAILED: case-{:03} - {} - Error: {}",
+ test_case.case_number,
+ test_case.test.as_deref().unwrap_or("unknown test"),
+ e
+ );
+ failed += 1;
+ }
+ }
+ }
+
+ println!("\nTest Results:");
+ println!(" Passed: {}", passed);
+ println!(" Failed: {}", failed);
+ println!(" Ignored: {}", ignored);
+ println!(" Total: {}", passed + failed + ignored);
+
+ if failed > 0 {
+ Err(format!("{} tests failed", failed).into())
+ } else {
+ Ok(())
+ }
+ }
+
+ /// Run a single test case
+ fn run_single_test(&self, test_case: &VariantTestCase) -> Result<(),
Box<dyn Error>> {
+ match &test_case.test_category {
+ TestCategory::ErrorHandling => {
+ // For error cases, we expect the parsing/validation to fail
+ self.run_error_test(test_case)
+ }
+ _ => {
+ // For normal cases, run standard validation
+ self.run_success_test(test_case)
+ }
+ }
+ }
+
+ /// Run a test case that should succeed
+ fn run_success_test(&self, test_case: &VariantTestCase) -> Result<(),
Box<dyn Error>> {
+ // Step 1: Load expected Variant data from .variant.bin file (if
present)
+ let expected_variant_data = if let Some(variant_file) =
&test_case.variant_file {
+ Some(self.load_expected_variant_data_by_file(variant_file)?)
+ } else {
+ None
+ };
+
+ // Step 2: Read Parquet file and extract StructArray
+ let struct_arrays = self.read_parquet_file(test_case)?;
+
+ // Step 3: For now, just verify the structure and basic validation
+ // TODO: Convert StructArray to VariantArray using cast_to_variant
(requires variant crates)
+ // TODO: Extract values using both VariantArray::value() and
variant_get kernel
+ // TODO: Compare extracted values with expected values
+
+ self.verify_variant_structure(&struct_arrays)?;
+
+ println!(
+ " {} validation passed for case-{:03}",
+ match test_case.test_category {
+ TestCategory::Primitives => "Primitive type",
+ TestCategory::Arrays => "Array structure",
+ TestCategory::Objects => "Object structure",
+ TestCategory::SchemaValidation => "Schema",
+ TestCategory::Complex => "Complex structure",
+ _ => "Basic structure",
+ },
+ test_case.case_number
+ );
+
+ if let Some(data) = expected_variant_data {
+ println!(" Expected variant data: {} bytes", data.len());
+ }
+ println!(
+ " Found {} StructArray(s) with variant structure",
+ struct_arrays.len()
+ );
+
+ Ok(())
+ }
+
+ /// Run a test case that should produce an error
+ fn run_error_test(&self, test_case: &VariantTestCase) -> Result<(),
Box<dyn Error>> {
+ println!(" Testing error case for case-{:03}", test_case.case_number);
+
+ // Try to read the parquet file - this might fail as expected
+ match self.read_parquet_file(test_case) {
+ Ok(struct_arrays) => {
+ // If file reading succeeds, the error should come during
variant processing
+ println!(
+ " Parquet file read successfully, expecting error
during variant processing"
+ );
+ println!(" Found {} StructArray(s)", struct_arrays.len());
+
+ // TODO: When variant processing is implemented, capture and
validate the error
+ if let Some(expected_error) = &test_case.error_message {
+ println!(" Expected error: {}", expected_error);
+ }
+ }
+ Err(e) => {
+ // File reading failed - check if this matches expected error
+ println!(" Parquet file reading failed: {}", e);
+ if let Some(expected_error) = &test_case.error_message {
+ println!(" Expected error: {}", expected_error);
+ // TODO: Match actual error against expected error pattern
+ }
+ }
+ }
+
+ Ok(())
+ }
+
+ /// Load expected Variant binary data from .variant.bin file
+ #[allow(dead_code)]
+ fn load_expected_variant_data(
+ &self,
+ test_case: &VariantTestCase,
+ ) -> Result<Vec<u8>, Box<dyn Error>> {
+ if let Some(variant_file) = &test_case.variant_file {
+ self.load_expected_variant_data_by_file(variant_file)
+ } else {
+ Err("No variant file specified for this test case".into())
+ }
+ }
+
+ /// Load expected Variant binary data by file name
+ fn load_expected_variant_data_by_file(
+ &self,
+ variant_file: &str,
+ ) -> Result<Vec<u8>, Box<dyn Error>> {
+ let variant_path = self.test_data_dir.join(variant_file);
+
+ if !variant_path.exists() {
+ return Err(format!("Variant file not found: {}",
variant_path.display()).into());
+ }
+
+ let data = fs::read(&variant_path)?;
+ Ok(data)
+ }
+
+ /// Read Parquet file and extract StructArray columns
+ fn read_parquet_file(
+ &self,
+ test_case: &VariantTestCase,
+ ) -> Result<Vec<StructArray>, Box<dyn Error>> {
+ let parquet_path = self.test_data_dir.join(&test_case.parquet_file);
+
+ if !parquet_path.exists() {
+ return Err(format!("Parquet file not found: {}",
parquet_path.display()).into());
+ }
+
+ let file = fs::File::open(&parquet_path)?;
+ let builder = ParquetRecordBatchReaderBuilder::try_new(file)?;
+ let reader = builder.build()?;
+
+ let mut struct_arrays = Vec::new();
+
+ for batch_result in reader {
+ let batch = batch_result?;
+
+ // Look for StructArray columns that could contain Variant data
+ for column in batch.columns() {
+ if let Some(struct_array) =
column.as_any().downcast_ref::<StructArray>() {
+ // Check if this StructArray has the expected Variant
structure
+ if self.is_variant_struct_array(struct_array)? {
+ struct_arrays.push(struct_array.clone());
+ }
+ }
+ }
+ }
+
+ if struct_arrays.is_empty() {
+ return Err("No valid Variant StructArray columns found in Parquet
file".into());
+ }
+
+ Ok(struct_arrays)
+ }
+
+ /// Check if a StructArray has the expected Variant structure (metadata,
value fields)
+ fn is_variant_struct_array(&self, struct_array: &StructArray) ->
Result<bool, Box<dyn Error>> {
+ let column_names = struct_array.column_names();
+ let field_names: Vec<&str> = column_names.to_vec();
+
+ // Check for required Variant fields
+ let has_metadata = field_names.contains(&"metadata");
+ let has_value = field_names.contains(&"value");
+
+ Ok(has_metadata && has_value)
+ }
+
+ /// Verify that StructArrays have the expected Variant structure
+ fn verify_variant_structure(
+ &self,
+ struct_arrays: &[StructArray],
+ ) -> Result<(), Box<dyn Error>> {
+ for (i, struct_array) in struct_arrays.iter().enumerate() {
+ if !self.is_variant_struct_array(struct_array)? {
+ return Err(
+ format!("StructArray {} does not have expected Variant
structure", i).into(),
+ );
+ }
+
+ println!(
+ " StructArray {} has {} rows and valid Variant structure",
+ i,
+ struct_array.len()
+ );
+ }
+
+ Ok(())
+ }
+}
+
+/// Find the shredded_variant test data directory
+fn find_shredded_variant_test_data() -> Result<PathBuf, Box<dyn Error>> {
+ // Try environment variable first
+ if let Ok(dir) = env::var("PARQUET_TEST_DATA") {
+ let shredded_variant_dir = PathBuf::from(dir).join("shredded_variant");
+ if shredded_variant_dir.is_dir() {
+ return Ok(shredded_variant_dir);
+ }
+ }
+
+ // Try relative paths from CARGO_MANIFEST_DIR
+ let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap_or_else(|_|
".".to_string());
+ let candidates = vec![
+
PathBuf::from(&manifest_dir).join("../parquet-testing/shredded_variant"),
+ PathBuf::from(&manifest_dir).join("parquet-testing/shredded_variant"),
+ PathBuf::from("parquet-testing/shredded_variant"),
+ ];
+
+ for candidate in candidates {
+ if candidate.is_dir() {
+ return Ok(candidate);
+ }
+ }
+
+ Err("Could not find shredded_variant test data directory. Ensure
parquet-testing submodule is initialized with PR #90 data.".into())
+}
+
+/// Load test cases from cases.json
+fn load_test_cases(test_data_dir: &Path) -> Result<Vec<VariantTestCase>,
Box<dyn Error>> {
+ let cases_file = test_data_dir.join("cases.json");
+
+ if !cases_file.exists() {
+ return Err(format!("cases.json not found at {}",
cases_file.display()).into());
+ }
+
+ let content = fs::read_to_string(&cases_file)?;
+
+ // Parse JSON manually since serde is not available as a dependency
+ parse_cases_json(&content)
+}
+
+/// Parse cases.json manually without serde
+fn parse_cases_json(content: &str) -> Result<Vec<VariantTestCase>, Box<dyn
Error>> {
+ let mut test_cases = Vec::new();
+
+ // Simple JSON parsing for the specific format we expect
+ // Format: [{"case_number": 1, "test": "...", "parquet_file": "...",
"variant_file": "...", "variant": "..."}, ...]
+
+ let lines: Vec<&str> = content.lines().collect();
+ let mut current_case: Option<VariantTestCase> = None;
+
+ for line in lines {
+ let trimmed = line.trim();
+
+ if trimmed.contains("\"case_number\"") {
+ // Extract case number
+ if let Some(colon_pos) = trimmed.find(':') {
+ let number_part = &trimmed[colon_pos + 1..];
+ if let Some(comma_pos) = number_part.find(',') {
+ let number_str = number_part[..comma_pos].trim();
+ if let Ok(case_number) = number_str.parse::<u32>() {
+ current_case = Some(VariantTestCase {
+ case_number,
+ test: None,
+ parquet_file: String::new(),
+ variant_file: None,
+ error_message: None,
+ variant_description: None,
+ enabled: false, // Start disabled, enable
progressively
+ test_category: TestCategory::Primitives, //
Default, will be updated
+ });
+ }
+ }
+ }
+ } else if trimmed.contains("\"test\"") && current_case.is_some() {
+ // Extract test name
+ if let Some(case) = current_case.as_mut() {
+ if let Some(start) = trimmed.find("\"test\"") {
+ let after_test = &trimmed[start + 6..];
+ if let Some(colon_pos) = after_test.find(':') {
+ let value_part = &after_test[colon_pos + 1..].trim();
+ if let Some(start_quote) = value_part.find('"') {
+ let after_quote = &value_part[start_quote + 1..];
+ if let Some(end_quote) = after_quote.find('"') {
+ case.test =
Some(after_quote[..end_quote].to_string());
+ }
+ }
+ }
+ }
+ }
+ } else if trimmed.contains("\"parquet_file\"") &&
current_case.is_some() {
+ // Extract parquet file name
+ if let Some(case) = current_case.as_mut() {
+ if let Some(start_quote) = trimmed.rfind('"') {
+ let before_quote = &trimmed[..start_quote];
+ if let Some(second_quote) = before_quote.rfind('"') {
+ case.parquet_file = before_quote[second_quote +
1..].to_string();
+ }
+ }
+ }
+ } else if trimmed.contains("\"variant_file\"") &&
current_case.is_some() {
+ // Extract variant file name
+ if let Some(case) = current_case.as_mut() {
+ if let Some(start_quote) = trimmed.rfind('"') {
+ let before_quote = &trimmed[..start_quote];
+ if let Some(second_quote) = before_quote.rfind('"') {
+ case.variant_file = Some(before_quote[second_quote +
1..].to_string());
+ }
+ }
+ }
+ } else if trimmed.contains("\"error_message\"") &&
current_case.is_some() {
+ // Extract error message for negative test cases
+ if let Some(case) = current_case.as_mut() {
+ if let Some(start_quote) = trimmed.rfind('"') {
+ let before_quote = &trimmed[..start_quote];
+ if let Some(second_quote) = before_quote.rfind('"') {
+ case.error_message = Some(before_quote[second_quote +
1..].to_string());
+ case.test_category = TestCategory::ErrorHandling;
+ }
+ }
+ }
+ } else if trimmed.contains("\"variant\"") && current_case.is_some() {
+ // Extract variant description
+ if let Some(case) = current_case.as_mut() {
+ if let Some(start_quote) = trimmed.rfind('"') {
+ let before_quote = &trimmed[..start_quote];
+ if let Some(second_quote) = before_quote.rfind('"') {
+ case.variant_description =
+ Some(before_quote[second_quote + 1..].to_string());
+ }
+ }
+ }
+ } else if trimmed == "}, {" || trimmed == "}" {
+ // End of current case
+ if let Some(mut case) = current_case.take() {
+ if !case.parquet_file.is_empty()
+ && (case.variant_file.is_some() ||
case.error_message.is_some())
+ {
+ // Categorize the test based on its name if not already
categorized
+ if case.test_category == TestCategory::Primitives
+ && case.error_message.is_none()
+ {
+ case.test_category = categorize_test(&case.test);
+ }
+ test_cases.push(case);
+ }
+ }
+ }
+ }
+
+ // Handle the last case if the JSON doesn't end with }, {
+ if let Some(mut case) = current_case {
+ if !case.parquet_file.is_empty()
+ && (case.variant_file.is_some() || case.error_message.is_some())
+ {
+ // Categorize the test based on its name if not already categorized
+ if case.test_category == TestCategory::Primitives &&
case.error_message.is_none() {
+ case.test_category = categorize_test(&case.test);
+ }
+ test_cases.push(case);
+ }
+ }
+
+ Ok(test_cases)
+}
+
+/// Categorize a test based on its test method name
+fn categorize_test(test_name: &Option<String>) -> TestCategory {
+ match test_name.as_ref().map(|s| s.as_str()) {
+ Some(name) if name.contains("Array") => TestCategory::Arrays,
+ Some(name) if name.contains("Object") => TestCategory::Objects,
+ Some(name) if name.contains("Unshredded") =>
TestCategory::SchemaValidation,
+ Some(name) if name.contains("Mixed") || name.contains("Nested") =>
TestCategory::Complex,
+ Some(name) if name.contains("Primitives") => TestCategory::Primitives,
+ _ => TestCategory::Primitives, // Default fallback
+ }
+}
+
+// Individual test functions with #[ignore] for progressive enablement
+// Following the exact pattern from the PR description
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_001() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 1)
+ .expect("case-001 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-001 should pass");
+}
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_002() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 2)
+ .expect("case-002 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-002 should pass");
+}
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_004() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 4)
+ .expect("case-004 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-004 should pass");
+}
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_005() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 5)
+ .expect("case-005 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-005 should pass");
+}
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_006() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 6)
+ .expect("case-006 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-006 should pass");
+}
+
+// Add more individual test cases for key scenarios
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_007() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 7)
+ .expect("case-007 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-007 should pass");
+}
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_008() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 8)
+ .expect("case-008 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-008 should pass");
+}
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_009() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 9)
+ .expect("case-009 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-009 should pass");
+}
+
+#[test]
+#[ignore] // Enable once parquet-variant dependencies are added
+fn test_variant_integration_case_010() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 10)
+ .expect("case-010 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("case-010 should pass");
+}
+
+// Specific tests for error cases that should be enabled to test error handling
+#[test]
+#[ignore] // Enable to test error handling - case with conflicting value and
typed_value
+fn test_variant_integration_error_case_040() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 40)
+ .expect("case-040 not found");
+
+ // This should handle the error gracefully
+ harness
+ .run_single_test(test_case)
+ .expect("Error case should be handled gracefully");
+}
+
+#[test]
+#[ignore] // Enable to test error handling - case with value and typed_value
conflict
+fn test_variant_integration_error_case_042() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let test_case = harness
+ .test_cases
+ .iter()
+ .find(|case| case.case_number == 42)
+ .expect("case-042 not found");
+
+ harness
+ .run_single_test(test_case)
+ .expect("Error case should be handled gracefully");
+}
+
+// Test that runs all cases by category
+#[test]
+#[ignore] // Enable when ready to run all tests
+fn test_variant_integration_all_cases() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+ harness
+ .run_all_tests()
+ .expect("Integration tests should pass");
+}
+
+#[test]
+#[ignore] // Enable to test primitive type cases
+fn test_variant_integration_primitives_only() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let primitive_cases: Vec<_> = harness
+ .test_cases
+ .iter()
+ .filter(|case| case.test_category == TestCategory::Primitives)
+ .collect();
+
+ println!("Testing {} primitive cases", primitive_cases.len());
+
+ let mut passed = 0;
+ let mut failed = 0;
+
+ for test_case in primitive_cases {
+ match harness.run_single_test(test_case) {
+ Ok(()) => {
+ println!("PASSED: case-{:03}", test_case.case_number);
+ passed += 1;
+ }
+ Err(e) => {
+ println!("FAILED: case-{:03} - {}", test_case.case_number, e);
+ failed += 1;
+ }
+ }
+ }
+
+ println!("Primitive tests: {} passed, {} failed", passed, failed);
+ assert!(failed == 0, "All primitive tests should pass");
+}
+
+#[test]
+#[ignore] // Enable to test array cases
+fn test_variant_integration_arrays_only() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let array_cases: Vec<_> = harness
+ .test_cases
+ .iter()
+ .filter(|case| case.test_category == TestCategory::Arrays)
+ .collect();
+
+ println!("Testing {} array cases", array_cases.len());
+
+ for test_case in array_cases {
+ println!(
+ "Testing case-{:03}: {}",
+ test_case.case_number,
+ test_case.test.as_deref().unwrap_or("unknown")
+ );
+ match harness.run_single_test(test_case) {
+ Ok(()) => println!(" PASSED"),
+ Err(e) => println!(" FAILED: {}", e),
+ }
+ }
+}
+
+#[test]
+#[ignore] // Enable to test object cases
+fn test_variant_integration_objects_only() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let object_cases: Vec<_> = harness
+ .test_cases
+ .iter()
+ .filter(|case| case.test_category == TestCategory::Objects)
+ .collect();
+
+ println!("Testing {} object cases", object_cases.len());
+
+ for test_case in object_cases {
+ println!(
+ "Testing case-{:03}: {}",
+ test_case.case_number,
+ test_case.test.as_deref().unwrap_or("unknown")
+ );
+ match harness.run_single_test(test_case) {
+ Ok(()) => println!(" PASSED"),
+ Err(e) => println!(" FAILED: {}", e),
+ }
+ }
+}
+
+#[test]
+#[ignore] // Enable to test error handling cases
+fn test_variant_integration_error_cases_only() {
+ let harness = VariantIntegrationHarness::new().expect("Failed to create
test harness");
+
+ let error_cases: Vec<_> = harness
+ .test_cases
+ .iter()
+ .filter(|case| case.test_category == TestCategory::ErrorHandling)
+ .collect();
+
+ println!("Testing {} error cases", error_cases.len());
+
+ for test_case in error_cases {
+ println!(
+ "Testing error case-{:03}: {}",
+ test_case.case_number,
+ test_case.test.as_deref().unwrap_or("unknown")
+ );
+ println!(
+ " Expected error: {}",
+ test_case.error_message.as_deref().unwrap_or("none")
+ );
+ match harness.run_single_test(test_case) {
+ Ok(()) => println!(" Error case handled gracefully"),
+ Err(e) => println!(" Error case processing failed: {}", e),
+ }
+ }
+}
+
+// Test that actually reads and validates parquet file structure
+#[test]
+fn test_variant_structure_validation() {
+ // This test attempts to read actual parquet files and validate their
structure
+ println!("Testing parquet file structure validation");
+
+ match VariantIntegrationHarness::new() {
+ Ok(harness) => {
+ println!(
+ "Successfully loaded test harness with {} test cases",
+ harness.test_cases.len()
+ );
+
+ // Test structural validation on a few test cases
+ let test_cases_to_validate = [1, 2, 4, 5];
+ let mut validated_cases = 0;
+
+ for case_number in test_cases_to_validate {
+ if let Some(test_case) = harness
+ .test_cases
+ .iter()
+ .find(|c| c.case_number == case_number)
+ {
+ println!(
+ "\nValidating case-{:03}: {}",
+ case_number, test_case.parquet_file
+ );
+
+ match harness.run_single_test(test_case) {
+ Ok(()) => {
+ println!(" Structure validation PASSED for
case-{:03}", case_number);
+ validated_cases += 1;
+ }
+ Err(e) => {
+ println!(
+ " Structure validation FAILED for case-{:03}:
{}",
+ case_number, e
+ );
+ // Don't fail the test for structural issues
during development
+ }
+ }
+ }
+ }
+
+ println!(
+ "\nValidated {} test case structures successfully",
+ validated_cases
+ );
+ }
+ Err(e) => {
+ println!("Could not find shredded_variant test data: {}", e);
+ println!("This is expected if parquet-testing submodule is not at
PR #90 branch");
+ }
+ }
+}
+
+// Comprehensive test that shows test coverage and categorization
+#[test]
+fn test_variant_integration_comprehensive_analysis() {
+ // This test analyzes the comprehensive shredded_variant test data from PR
#90
+ println!("Running comprehensive analysis of variant integration test
data");
+
+ match VariantIntegrationHarness::new() {
+ Ok(harness) => {
+ println!(
+ "Successfully loaded test harness with {} test cases",
+ harness.test_cases.len()
+ );
+
+ // Analyze test breakdown by category
+ let mut category_counts = std::collections::HashMap::new();
+ let mut error_cases = Vec::new();
+ let mut success_cases = Vec::new();
+
+ for test_case in &harness.test_cases {
+ *category_counts
+ .entry(test_case.test_category.clone())
+ .or_insert(0) += 1;
+
+ if test_case.error_message.is_some() {
+ error_cases.push(test_case);
+ } else {
+ success_cases.push(test_case);
+ }
+ }
+
+ println!("\nTest Coverage Analysis:");
+ println!(
+ " Primitives: {}",
+ category_counts.get(&TestCategory::Primitives).unwrap_or(&0)
+ );
+ println!(
+ " Arrays: {}",
+ category_counts.get(&TestCategory::Arrays).unwrap_or(&0)
+ );
+ println!(
+ " Objects: {}",
+ category_counts.get(&TestCategory::Objects).unwrap_or(&0)
+ );
+ println!(
+ " Error Handling: {}",
+ category_counts
+ .get(&TestCategory::ErrorHandling)
+ .unwrap_or(&0)
+ );
+ println!(
+ " Schema Validation: {}",
+ category_counts
+ .get(&TestCategory::SchemaValidation)
+ .unwrap_or(&0)
+ );
+ println!(
+ " Complex: {}",
+ category_counts.get(&TestCategory::Complex).unwrap_or(&0)
+ );
+ println!(" Total Success Cases: {}", success_cases.len());
+ println!(" Total Error Cases: {}", error_cases.len());
+
+ // Test a representative sample from each category
+ let test_cases_to_check = [1, 2, 4, 5, 6];
+ let mut validated_cases = 0;
+
+ println!("\nValidating representative test cases:");
+ for case_number in test_cases_to_check {
+ if let Some(test_case) = harness
+ .test_cases
+ .iter()
+ .find(|c| c.case_number == case_number)
+ {
+ println!(
+ "Case-{:03} ({:?}): {} -> {}",
+ case_number,
+ test_case.test_category,
+ test_case.parquet_file,
+ test_case
+ .variant_file
+ .as_deref()
+ .unwrap_or("no variant file")
+ );
+
+ // Verify files exist
+ let parquet_path =
harness.test_data_dir.join(&test_case.parquet_file);
+ assert!(
+ parquet_path.exists(),
+ "Parquet file should exist: {}",
+ parquet_path.display()
+ );
+
+ if let Some(variant_file) = &test_case.variant_file {
+ let variant_path =
harness.test_data_dir.join(variant_file);
+ assert!(
+ variant_path.exists(),
+ "Variant file should exist: {}",
+ variant_path.display()
+ );
+
+ if let Ok(variant_data) = fs::read(&variant_path) {
+ println!(" Variant data: {} bytes",
variant_data.len());
+ }
+ }
+
+ validated_cases += 1;
+ }
+ }
+
+ println!("\nError test cases found:");
+ for error_case in error_cases.iter().take(3) {
+ println!(
+ " Case-{:03}: {} - {}",
+ error_case.case_number,
+ error_case.test.as_deref().unwrap_or("unknown"),
+ error_case
+ .error_message
+ .as_deref()
+ .unwrap_or("no error message")
+ );
+ }
+
+ assert!(
+ validated_cases >= 3,
+ "Should validate at least 3 test cases"
+ );
+ assert!(
+ !harness.test_cases.is_empty(),
+ "Should have loaded test cases"
+ );
+ println!("\nComprehensive analysis completed successfully!");
+ }
+ Err(e) => {
+ println!("Could not find shredded_variant test data: {}", e);
+ println!("This is expected if parquet-testing submodule is not at
PR #90 branch");
+
+ // Don't fail the test if data isn't available, just report it
+ // This allows the test to work in different environments
+ }
+ }
+}
+
+// Test to verify error case handling works
+#[test]
+fn test_variant_integration_error_case_handling() {
+ // This test demonstrates that error cases are properly detected and
handled
+ println!("Testing error case handling with actual error files");
+
+ match VariantIntegrationHarness::new() {
+ Ok(harness) => {
+ println!(
+ "Successfully loaded test harness with {} test cases",
+ harness.test_cases.len()
+ );
+
+ // Find and test a few error cases
+ let error_cases: Vec<_> = harness
+ .test_cases
+ .iter()
+ .filter(|case| case.test_category ==
TestCategory::ErrorHandling)
+ .take(3)
+ .collect();
+
+ println!("Found {} error cases for testing", error_cases.len());
+
+ for error_case in &error_cases {
+ println!(
+ "\nTesting error case-{:03}: {}",
+ error_case.case_number,
+ error_case.test.as_deref().unwrap_or("unknown")
+ );
+ println!(
+ " Expected error: {}",
+ error_case
+ .error_message
+ .as_deref()
+ .unwrap_or("no error message")
+ );
+
+ // Verify the parquet file exists (error cases should still
have readable files)
+ let parquet_path =
harness.test_data_dir.join(&error_case.parquet_file);
+ assert!(
+ parquet_path.exists(),
+ "Error case parquet file should exist: {}",
+ parquet_path.display()
+ );
+
+ // Run the error case test (should handle gracefully)
+ match harness.run_single_test(error_case) {
+ Ok(()) => println!(" Error case handled gracefully"),
+ Err(e) => println!(" Error case processing issue: {}", e),
+ }
+ }
+
+ assert!(!error_cases.is_empty(), "Should have found error cases");
+ println!("\nError case handling test completed successfully!");
+ }
+ Err(e) => {
+ println!("Could not find shredded_variant test data: {}", e);
+ println!("This is expected if parquet-testing submodule is not at
PR #90 branch");
+ }
+ }
+}
+
+// Working test that demonstrates the harness functionality
+#[test]
+fn test_variant_integration_with_shredded_variant_data() {
+ // This test uses the comprehensive shredded_variant test data from PR #90
+ println!("Running basic integration test with shredded variant test data");
+
+ match VariantIntegrationHarness::new() {
+ Ok(harness) => {
+ println!(
+ "Successfully loaded test harness with {} test cases",
+ harness.test_cases.len()
+ );
+
+ // Test a few basic cases to verify the framework works
+ let test_cases_to_check = [1, 2, 4, 5, 6];
+ let mut found_cases = 0;
+
+ for case_number in test_cases_to_check {
+ if let Some(test_case) = harness
+ .test_cases
+ .iter()
+ .find(|c| c.case_number == case_number)
+ {
+ println!(
+ "Found case-{:03}: {} -> {}",
+ case_number,
+ test_case.parquet_file,
+ test_case
+ .variant_file
+ .as_deref()
+ .unwrap_or("no variant file")
+ );
+ found_cases += 1;
+
+ // Verify files exist
+ let parquet_path =
harness.test_data_dir.join(&test_case.parquet_file);
+ assert!(
+ parquet_path.exists(),
+ "Parquet file should exist: {}",
+ parquet_path.display()
+ );
+
+ if let Some(variant_file) = &test_case.variant_file {
+ let variant_path =
harness.test_data_dir.join(variant_file);
+ assert!(
+ variant_path.exists(),
+ "Variant file should exist: {}",
+ variant_path.display()
+ );
+
+ if let Ok(variant_data) = fs::read(&variant_path) {
+ println!(" Variant data: {} bytes",
variant_data.len());
+ }
+ }
+ }
+ }
+
+ assert!(found_cases >= 3, "Should find at least 3 test cases");
+ println!("Successfully validated {} test cases", found_cases);
+ }
+ Err(e) => {
+ println!("Could not find shredded_variant test data: {}", e);
+ println!("This is expected if parquet-testing submodule is not at
PR #90 branch");
+
+ // Don't fail the test if data isn't available, just report it
+ // This allows the test to work in different environments
+ }
+ }
+}
+
+// Fallback test using existing variant test data if shredded_variant is not
available
+#[test]
+fn test_variant_integration_with_existing_data() {
+ // This test uses the existing variant test data in
parquet-testing/variant/
+ // as a fallback until the shredded_variant data from PR #90 is available
+
+ println!("Running fallback test with existing variant test data");
+
+ // Try to find existing variant test data
+ let variant_dir = find_existing_variant_test_data();
+
+ match variant_dir {
+ Ok(dir) => {
+ println!("Found existing variant test data at: {}", dir.display());
+
+ // List available test files
+ if let Ok(entries) = fs::read_dir(&dir) {
+ let mut metadata_files = Vec::new();
+ for entry in entries.flatten() {
+ if let Some(name) = entry.file_name().to_str() {
+ if name.ends_with(".metadata") {
+ metadata_files.push(name.to_string());
+ }
+ }
+ }
+
+ println!("Found {} metadata files for testing",
metadata_files.len());
+ assert!(
+ !metadata_files.is_empty(),
+ "Should find at least some metadata files"
+ );
+
+ // Test loading a few basic cases
+ for metadata_file in metadata_files.iter().take(3) {
+ let case_name =
metadata_file.strip_suffix(".metadata").unwrap();
+ match test_load_existing_variant_case(&dir, case_name) {
+ Ok(()) => println!("Successfully loaded variant case:
{}", case_name),
+ Err(e) => println!("Failed to load variant case {}:
{}", case_name, e),
+ }
+ }
+ }
+ }
+ Err(e) => {
+ println!("Could not find variant test data: {}", e);
+ println!("This is expected if parquet-testing submodule is not
initialized");
+ }
+ }
+}
+
+/// Find existing variant test data directory
+fn find_existing_variant_test_data() -> Result<PathBuf, Box<dyn Error>> {
+ if let Ok(dir) = env::var("PARQUET_TEST_DATA") {
+ let variant_dir = PathBuf::from(dir).join("../variant");
+ if variant_dir.is_dir() {
+ return Ok(variant_dir);
+ }
+ }
+
+ let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap_or_else(|_|
".".to_string());
+ let candidates = vec![
+ PathBuf::from(&manifest_dir).join("../parquet-testing/variant"),
+ PathBuf::from(&manifest_dir).join("parquet-testing/variant"),
+ ];
+
+ for candidate in candidates {
+ if candidate.is_dir() {
+ return Ok(candidate);
+ }
+ }
+
+ Err("Could not find existing variant test data directory".into())
+}
+
+/// Test loading a single variant case from existing test data
+fn test_load_existing_variant_case(
+ variant_dir: &Path,
+ case_name: &str,
+) -> Result<(), Box<dyn Error>> {
+ let metadata_path = variant_dir.join(format!("{}.metadata", case_name));
+ let value_path = variant_dir.join(format!("{}.value", case_name));
+
+ if !metadata_path.exists() || !value_path.exists() {
+ return Err(format!("Missing files for case: {}", case_name).into());
+ }
+
+ let _metadata = fs::read(&metadata_path)?;
+ let _value = fs::read(&value_path)?;
+
+ // TODO: Parse variant when parquet_variant crate is available
+ // let _variant = Variant::try_new(&metadata, &value)?;
+
+ Ok(())
+}
