Ignore integration tests in cross-compiled targets

As stated [here](https://github.com/rust-embedded/cross#supported-targets)
spawning threads in tests will make them fail or they may not terminate
at all.

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
 
           - os: macos-latest
             target: aarch64-apple-darwin
-            use-cross: false
+            use-cross: true
 
     steps:
     - name: Checkout repository
@@ -47,6 +47,16 @@ jobs:
         override: true
         target: ${{ matrix.target }}
 
+    - name: Create .cargo/config.toml
+      if: ${{ matrix.use-cross == true }}
+      shell: bash
+      run: |
+           mkdir .cargo
+           cat > .cargo/config.toml <<EOF
+           [target.${{ matrix.target }}]
+           rustflags = ["--cfg", "sd_cross_compile"]
+           EOF
+
     - name: Test
       uses: actions-rs/cargo@v1
       with:

tests/cli.rs

@@ -1,17 +1,20 @@
-use anyhow::Result;
-use assert_cmd::Command;
-use std::io::prelude::*;
+#[cfg(test)]
+#[cfg(not(sd_cross_compile))] // Cross-compilation does not allow to spawn threads but `command.assert()` would do.
+mod cli {
+    use anyhow::Result;
+    use assert_cmd::Command;
+    use std::io::prelude::*;
 
-fn sd() -> Command {
+    fn sd() -> Command {
         Command::cargo_bin(env!("CARGO_PKG_NAME")).expect("Error invoking sd")
-}
+    }
 
-fn assert_file(path: &std::path::Path, content: &str) {
+    fn assert_file(path: &std::path::Path, content: &str) {
         assert_eq!(content, std::fs::read_to_string(path).unwrap());
-}
+    }
 
-#[test]
-fn in_place() -> Result<()> {
+    #[test]
+    fn in_place() -> Result<()> {
         let mut file = tempfile::NamedTempFile::new()?;
         file.write(b"abc123def")?;
         let path = file.into_temp_path();
@@ -22,10 +25,10 @@ fn in_place() -> Result<()> {
         assert_file(&path.to_path_buf(), "def");
 
         Ok(())
-}
+    }
 
-#[test]
-fn in_place_with_empty_result_file() -> Result<()> {
+    #[test]
+    fn in_place_with_empty_result_file() -> Result<()> {
         let mut file = tempfile::NamedTempFile::new()?;
         file.write(b"a7c")?;
         let path = file.into_temp_path();
@@ -36,10 +39,10 @@ fn in_place_with_empty_result_file() -> Result<()> {
         assert_file(&path.to_path_buf(), "");
 
         Ok(())
-}
+    }
 
-#[test]
-fn replace_into_stdout() -> Result<()> {
+    #[test]
+    fn replace_into_stdout() -> Result<()> {
         let mut file = tempfile::NamedTempFile::new()?;
         file.write(b"abc123def")?;
 
@@ -52,10 +55,10 @@ fn replace_into_stdout() -> Result<()> {
         assert_file(file.path(), "abc123def");
 
         Ok(())
-}
+    }
 
-#[test]
-fn stdin() -> Result<()> {
+    #[test]
+    fn stdin() -> Result<()> {
         sd().args(&["abc\\d+", ""])
             .write_stdin("abc123def")
             .assert()
@@ -63,4 +66,5 @@ fn stdin() -> Result<()> {
             .stdout("def");
 
         Ok(())
+    }
 }