Remove need for hadoop binary

README.md

@@ -64,7 +64,7 @@ cargo build --features token,kerberos
 An object_store implementation for HDFS is provided in the [hdfs-native-object-store](./crates/hdfs-native-object-store/) crate.
 
 ## Running tests
-The tests are mostly integration tests that utilize a small Java application in `rust/mindifs/` that runs a custom `MiniDFSCluster`. To run the tests, you need to have Java, Maven, Hadoop binaries, and Kerberos tools available and on your path. Any Java version between 8 and 17 should work.
+The tests are mostly integration tests that utilize a small Java application in `rust/mindifs/` that runs a custom `MiniDFSCluster`. To run the tests, you need to have Java, Maven, and Kerberos tools available and on your path. Any Java version between 8 and 17 should work.
 
 ```bash
 cargo test -p hdfs-native --features token,kerberos,intergation-test

crates/hdfs-native/minidfs/src/main/java/main/Main.java

@@ -9,6 +9,8 @@
 import java.util.Set;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
@@ -34,6 +36,8 @@
 
 public class Main {
 
+    static int TEST_FILE_INTS = 64 * 1024 * 1024;
+
     public static void main(String args[]) throws Exception {
         Set<String> flags = new HashSet<>();
         for (String arg : args) {
@@ -162,6 +166,15 @@ public static void main(String args[]) throws Exception {
 
         hdfsConf.writeXml(new FileOutputStream("target/test/core-site.xml"));
 
+        if (flags.contains("testfile")) {
+            FileSystem fs = FileSystem.get(hdfsConf);
+            FSDataOutputStream os = fs.create(new Path("/testfile"));
+            for (int i=0; i < TEST_FILE_INTS; i++) {
+                os.writeInt(i);
+            }
+            os.close();
+        }
+
         System.out.println("Ready!");
         if (flags.contains("security")) {
             System.out.println(kdc.getKrb5conf().toPath().toString());

crates/hdfs-native/src/minidfs.rs

@@ -9,6 +9,7 @@ use which::which;
 
 #[derive(PartialEq, Eq, Hash, Debug)]
 pub enum DfsFeatures {
+    TESTFILE,
     SECURITY,
     TOKEN,
     PRIVACY,
@@ -21,6 +22,7 @@ pub enum DfsFeatures {
 impl DfsFeatures {
     pub fn as_str(&self) -> &str {
         match self {
+            DfsFeatures::TESTFILE => "testfile",
             DfsFeatures::EC => "ec",
             DfsFeatures::HA => "ha",
             DfsFeatures::VIEWFS => "viewfs",

crates/hdfs-native/tests/common/mod.rs

@@ -1,45 +1,8 @@
 #![allow(dead_code)]
 use bytes::Buf;
-use std::collections::HashSet;
-use std::io::{BufWriter, Write};
-use std::process::Command;
-use tempfile::NamedTempFile;
-use which::which;
-
-use hdfs_native::minidfs::{DfsFeatures, MiniDfs};
 
 pub const TEST_FILE_INTS: usize = 64 * 1024 * 1024;
 
-pub fn setup(features: &HashSet<DfsFeatures>) -> MiniDfs {
-    let hadoop_exc = which("hadoop").expect("Failed to find hadoop executable");
-
-    let dfs = MiniDfs::with_features(features);
-
-    let mut file = NamedTempFile::new_in("target/test").unwrap();
-    {
-        let mut writer = BufWriter::new(file.as_file_mut());
-        for i in 0..TEST_FILE_INTS as i32 {
-            let bytes = i.to_be_bytes();
-            writer.write_all(&bytes).unwrap();
-        }
-        writer.flush().unwrap();
-    }
-
-    let status = Command::new(hadoop_exc)
-        .args([
-            "fs",
-            "-copyFromLocal",
-            "-f",
-            file.path().to_str().unwrap(),
-            &format!("{}/testfile", dfs.url),
-        ])
-        .status()
-        .unwrap();
-    assert!(status.success());
-
-    dfs
-}
-
 pub fn assert_bufs_equal(buf1: &impl Buf, buf2: &impl Buf, message: Option<String>) {
     assert_eq!(buf1.chunk().len(), buf2.chunk().len());
 

crates/hdfs-native/tests/test_integration.rs

@@ -3,9 +3,13 @@ mod common;
 
 #[cfg(feature = "integration-test")]
 mod test {
-    use crate::common::{assert_bufs_equal, setup, TEST_FILE_INTS};
+    use crate::common::{assert_bufs_equal, TEST_FILE_INTS};
     use bytes::{BufMut, BytesMut};
-    use hdfs_native::{client::FileStatus, minidfs::DfsFeatures, Client, Result, WriteOptions};
+    use hdfs_native::{
+        client::FileStatus,
+        minidfs::{DfsFeatures, MiniDfs},
+        Client, Result, WriteOptions,
+    };
     use serial_test::serial;
     use std::collections::HashSet;
 
@@ -104,7 +108,7 @@ mod test {
     pub async fn test_with_features(features: &HashSet<DfsFeatures>) -> Result<()> {
         let _ = env_logger::builder().is_test(true).try_init();
 
-        let _dfs = setup(features);
+        let _dfs = MiniDfs::with_features(features);
         let client = Client::default();
 
         test_file_info(&client).await?;

crates/hdfs-native/tests/test_read.rs

@@ -3,9 +3,12 @@ mod common;
 
 #[cfg(feature = "integration-test")]
 mod test {
-    use crate::common::{setup, TEST_FILE_INTS};
+    use crate::common::TEST_FILE_INTS;
     use bytes::Buf;
-    use hdfs_native::{minidfs::DfsFeatures, Client, Result};
+    use hdfs_native::{
+        minidfs::{DfsFeatures, MiniDfs},
+        Client, Result,
+    };
     use serial_test::serial;
     use std::collections::HashSet;
 
@@ -14,7 +17,7 @@ mod test {
     async fn test_read() -> Result<()> {
         let _ = env_logger::builder().is_test(true).try_init();
 
-        let _dfs = setup(&HashSet::from([DfsFeatures::HA]));
+        let _dfs = MiniDfs::with_features(&HashSet::from([DfsFeatures::HA, DfsFeatures::TESTFILE]));
         let client = Client::default();
 
         // Read the whole file

crates/hdfs-native/tests/test_write.rs

@@ -3,9 +3,12 @@ mod common;
 
 #[cfg(feature = "integration-test")]
 mod test {
-    use crate::common::{assert_bufs_equal, setup};
+    use crate::common::assert_bufs_equal;
     use bytes::{BufMut, BytesMut};
-    use hdfs_native::{minidfs::DfsFeatures, Client, Result, WriteOptions};
+    use hdfs_native::{
+        minidfs::{DfsFeatures, MiniDfs},
+        Client, Result, WriteOptions,
+    };
     use serial_test::serial;
     use std::collections::HashSet;
 
@@ -14,7 +17,7 @@ mod test {
     async fn test_write() {
         let _ = env_logger::builder().is_test(true).try_init();
 
-        let _dfs = setup(&HashSet::from([DfsFeatures::HA]));
+        let _dfs = MiniDfs::with_features(&HashSet::from([DfsFeatures::HA]));
         let client = Client::default();
 
         test_create(&client).await.unwrap();