1 files changed, 99 insertions, 0 deletions
diff --git a/vendor/tracing-attributes/tests/follows_from.rs b/vendor/tracing-attributes/tests/follows_from.rs
new file mode 100644
index 000000000..da0eec635
--- /dev/null
+++ b/vendor/tracing-attributes/tests/follows_from.rs
@@ -0,0 +1,99 @@
+use tracing::{subscriber::with_default, Id, Level, Span};
+use tracing_attributes::instrument;
+use tracing_mock::*;
+
+#[instrument(follows_from = causes, skip(causes))]
+fn with_follows_from_sync(causes: impl IntoIterator<Item = impl Into<Option<Id>>>) {}
+
+#[instrument(follows_from = causes, skip(causes))]
+async fn with_follows_from_async(causes: impl IntoIterator<Item = impl Into<Option<Id>>>) {}
+
+#[instrument(follows_from = [&Span::current()])]
+fn follows_from_current() {}
+
+#[test]
+fn follows_from_sync_test() {
+    let cause_a = span::mock().named("cause_a");
+    let cause_b = span::mock().named("cause_b");
+    let cause_c = span::mock().named("cause_c");
+    let consequence = span::mock().named("with_follows_from_sync");
+
+    let (subscriber, handle) = subscriber::mock()
+        .new_span(cause_a.clone())
+        .new_span(cause_b.clone())
+        .new_span(cause_c.clone())
+        .new_span(consequence.clone())
+        .follows_from(consequence.clone(), cause_a)
+        .follows_from(consequence.clone(), cause_b)
+        .follows_from(consequence.clone(), cause_c)
+        .enter(consequence.clone())
+        .exit(consequence)
+        .done()
+        .run_with_handle();
+
+    with_default(subscriber, || {
+        let cause_a = tracing::span!(Level::TRACE, "cause_a");
+        let cause_b = tracing::span!(Level::TRACE, "cause_b");
+        let cause_c = tracing::span!(Level::TRACE, "cause_c");
+
+        with_follows_from_sync(&[cause_a, cause_b, cause_c])
+    });
+
+    handle.assert_finished();
+}
+
+#[test]
+fn follows_from_async_test() {
+    let cause_a = span::mock().named("cause_a");
+    let cause_b = span::mock().named("cause_b");
+    let cause_c = span::mock().named("cause_c");
+    let consequence = span::mock().named("with_follows_from_async");
+
+    let (subscriber, handle) = subscriber::mock()
+        .new_span(cause_a.clone())
+        .new_span(cause_b.clone())
+        .new_span(cause_c.clone())
+        .new_span(consequence.clone())
+        .follows_from(consequence.clone(), cause_a)
+        .follows_from(consequence.clone(), cause_b)
+        .follows_from(consequence.clone(), cause_c)
+        .enter(consequence.clone())
+        .exit(consequence)
+        .done()
+        .run_with_handle();
+
+    with_default(subscriber, || {
+        block_on_future(async {
+            let cause_a = tracing::span!(Level::TRACE, "cause_a");
+            let cause_b = tracing::span!(Level::TRACE, "cause_b");
+            let cause_c = tracing::span!(Level::TRACE, "cause_c");
+
+            with_follows_from_async(&[cause_a, cause_b, cause_c]).await
+        })
+    });
+
+    handle.assert_finished();
+}
+
+#[test]
+fn follows_from_current_test() {
+    let cause = span::mock().named("cause");
+    let consequence = span::mock().named("follows_from_current");
+
+    let (subscriber, handle) = subscriber::mock()
+        .new_span(cause.clone())
+        .enter(cause.clone())
+        .new_span(consequence.clone())
+        .follows_from(consequence.clone(), cause.clone())
+        .enter(consequence.clone())
+        .exit(consequence)
+        .exit(cause)
+        .done()
+        .run_with_handle();
+
+    with_default(subscriber, || {
+        tracing::span!(Level::TRACE, "cause").in_scope(follows_from_current)
+    });
+
+    handle.assert_finished();
+}