Delegate to withSpan(_ baggage:) from withSpan(_ context:) (#36)

Co-authored-by: Konrad `ktoso` Malawski <[email protected]>

Author: slashmo

Sources/Tracing/Tracer.swift

@@ -97,14 +97,7 @@ extension Tracer {
         ofKind kind: SpanKind = .internal,
         _ function: (Span) throws -> T
     ) rethrows -> T {
-        let span = self.startSpan(operationName, context: context, ofKind: kind)
-        defer { span.end() }
-        do {
-            return try function(span)
-        } catch {
-            span.recordError(error)
-            throw error // rethrow
-        }
+        return try self.withSpan(operationName, baggage: context.baggage, function)
     }
 
     /// Execute a specific task within a newly created `Span`.

Tests/TracingTests/TracerTests+XCTest.swift

@@ -29,6 +29,7 @@ extension TracerTests {
                 ("testContextPropagationWithNoOpSpan", testContextPropagationWithNoOpSpan),
                 ("testWithSpan_success", testWithSpan_success),
                 ("testWithSpan_throws", testWithSpan_throws),
+                ("testWithSpan_context", testWithSpan_context),
            ]
    }
 }

Tests/TracingTests/TracerTests.swift

@@ -95,6 +95,21 @@ final class TracerTests: XCTestCase {
         }
         XCTFail("Should have throw")
     }
+
+    func testWithSpan_context() {
+        let tracer = TestTracer()
+        InstrumentationSystem.bootstrapInternal(tracer)
+        defer {
+            InstrumentationSystem.bootstrapInternal(NoOpTracer())
+        }
+
+        var spanEnded = false
+        tracer.onEndSpan = { _ in spanEnded = true }
+
+        tracer.withSpan("", context: DefaultLoggingContext.topLevel(logger: Logger(label: "test"))) { _ in }
+
+        XCTAssertTrue(spanEnded)
+    }
 }
 
 struct ExampleSpanError: Error, Equatable {}