parquet/src/util/test_common/file_util.rs

// Licensed to the Apache Software Foundation (ASF) under one
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// 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,
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// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

use std::{env, fs, io::Write, path::PathBuf, str::FromStr};

/// Returns path to the test parquet file in 'data' directory
pub fn get_test_path(file_name: &str) -> PathBuf {
    let mut pathbuf =
        PathBuf::from_str(&arrow::util::test_util::parquet_test_data()).unwrap();
    pathbuf.push(file_name);
    pathbuf
}

/// Returns file handle for a test parquet file from 'data' directory
pub fn get_test_file(file_name: &str) -> fs::File {
    let path = get_test_path(file_name);
    fs::File::open(path.as_path()).unwrap_or_else(|err| {
        panic!(
            "Test file {} could not be opened, did you do `git submodule update`?: {}",
            path.display(),
            err
        )
    })
}

/// Returns file handle for a temp file in 'target' directory with a provided content
pub fn get_temp_file(file_name: &str, content: &[u8]) -> fs::File {
    // build tmp path to a file in "target/debug/testdata"
    let mut path_buf = env::current_dir().unwrap();
    path_buf.push("target");
    path_buf.push("debug");
    path_buf.push("testdata");
    fs::create_dir_all(&path_buf).unwrap();
    path_buf.push(file_name);

    // write file content
    let mut tmp_file = fs::File::create(path_buf.as_path()).unwrap();
    tmp_file.write_all(content).unwrap();
    tmp_file.sync_all().unwrap();

    // return file handle for both read and write
    let file = fs::OpenOptions::new()
        .read(true)
        .write(true)
        .open(path_buf.as_path());
    assert!(file.is_ok());
    file.unwrap()
}

pub fn get_temp_filename() -> PathBuf {
    let mut path_buf = env::current_dir().unwrap();
    path_buf.push("target");
    path_buf.push("debug");
    path_buf.push("testdata");
    fs::create_dir_all(&path_buf).unwrap();
    path_buf.push(rand::random::<i16>().to_string());

    path_buf
}