add tempdir crate

Author: holyshared

Cargo.lock

@@ -12,3 +12,6 @@ readme = "README.md"
 
 [dependencies]
 combine = "2.0.0"
+
+[dev-dependencies]
+tempdir = "0.3"

Cargo.toml

@@ -1,14 +1,20 @@
 extern crate lcov_parser;
+extern crate tempdir;
 
 use lcov_parser:: { merge_files };
+use tempdir::TempDir;
 
 fn main() {
     let trace_files = [
         "../../../tests/fixtures/fixture1.info",
         "../../../tests/fixtures/fixture2.info"
     ];
     let _ = match merge_files(&trace_files) {
-        Ok(report) => report.save_as("/tmp/merged_report.info"),
+        Ok(report) => {
+            let tmp_dir = TempDir::new("example_report").expect("create temp dir");
+            let file_path = tmp_dir.path().join("merged_report.lcov");
+            report.save_as(file_path.as_path().clone())
+        },
         Err(err) => panic!(err)
     };
 }

examples/marge_files.rs

@@ -120,9 +120,11 @@ impl ReportMerger {
 
 #[cfg(test)]
 mod tests {
+    extern crate tempdir;
+
+    use self::tempdir::TempDir;
     use merger::*;
     use merger::ops:: { MergeError, TestError, ChecksumError, MergeLine };
-    use std::path::Path;
     use std::fs::File;
     use std::io::*;
 
@@ -132,9 +134,14 @@ mod tests {
 
         let mut parse = ReportMerger::new();
         let report = parse.merge(&[ report_path ]).unwrap();
-        let _ = report.save_as("/tmp/report.lcov").unwrap();
 
-        assert_eq!(Path::new("/tmp/report.lcov").exists(), true);
+        {
+            let tmp_dir = TempDir::new("report").expect("create temp dir");
+            let file_path = tmp_dir.path().join("report.lcov");
+            let _ = report.save_as(file_path.clone()).unwrap();
+
+            assert_eq!(file_path.as_path().exists(), true);
+        }
     }
 
     #[test]