test(wasi): run a few tests that shouldn't have been disabled (#370)

Author: Stebalien

.github/workflows/ci.yml

@@ -13,6 +13,7 @@ env:
   RUSTDOCFLAGS: "-D warnings"
   NDK_VERSION: "r26d"
   ANDROID_VERSION: "12.0.0"
+  WASMTIME_BACKTRACE_DETAILS: 1
 
 name: CI
 jobs:
@@ -125,7 +126,7 @@ jobs:
       - name: Build
         run: cargo build --target ${{ matrix.platform.target }} ${{ matrix.rust-version == 'nightly' && '--features nightly' || '' }}
       - name: Test
-        run: cargo test --target ${{ matrix.platform.target }} ${{ matrix.rust-version == 'nightly' && '--features nightly' || '' }} ${{ matrix.test-flags }}
+        run: cargo test --target ${{ matrix.platform.target }} ${{ matrix.rust-version == 'nightly' && '--features nightly' || '' }} ${{ matrix.test-flags }} -- --nocapture
       - name: Stop the redroid container
         if: ${{ contains(matrix.platform.target, 'android') }}
         run: |

tests/namedtempfile.rs

@@ -321,23 +321,31 @@ fn test_write_after_close() {
 }
 
 #[test]
-#[cfg_attr(target_os = "wasi", ignore = "env::temp_dir is not supported")]
 fn test_change_dir() {
-    std::env::set_current_dir(env::temp_dir()).unwrap();
+    configure_wasi_temp_dir();
+
+    let dir_a = tempdir().unwrap();
+    let dir_b = tempdir().unwrap();
+
+    std::env::set_current_dir(&dir_a).expect("failed to change to directory ~");
     let tmpfile = NamedTempFile::new_in(".").unwrap();
     let path = std::env::current_dir().unwrap().join(tmpfile.path());
-    std::env::set_current_dir("/").unwrap();
+    std::env::set_current_dir(&dir_b).expect("failed to change to directory B");
     drop(tmpfile);
     assert!(!exists(path))
 }
 
 #[test]
-#[cfg_attr(target_os = "wasi", ignore = "env::temp_dir is not supported")]
 fn test_change_dir_make() {
-    std::env::set_current_dir(env::temp_dir()).unwrap();
+    configure_wasi_temp_dir();
+
+    let dir_a = tempdir().unwrap();
+    let dir_b = tempdir().unwrap();
+
+    std::env::set_current_dir(&dir_a).expect("failed to change to directory A");
     let tmpfile = Builder::new().make_in(".", |p| File::create(p)).unwrap();
     let path = std::env::current_dir().unwrap().join(tmpfile.path());
-    std::env::set_current_dir("/").unwrap();
+    std::env::set_current_dir(&dir_b).expect("failed to change to directory B");
     drop(tmpfile);
     assert!(!exists(path))
 }