1 files changed, 71 insertions, 0 deletions
diff --git a/src/test/scala/chiselTests/BundleSpec.scala b/src/test/scala/chiselTests/BundleSpec.scala
new file mode 100644
index 00000000..0a6866d3
--- /dev/null
+++ b/src/test/scala/chiselTests/BundleSpec.scala
@@ -0,0 +1,71 @@
+// See LICENSE for license details.
+
+package chiselTests
+
+import chisel3._
+import chisel3.testers.BasicTester
+
+trait BundleSpecUtils {
+  class BundleFooBar extends Bundle {
+    val foo = UInt(16.W)
+    val bar = UInt(16.W)
+    override def cloneType = (new BundleFooBar).asInstanceOf[this.type]
+  }
+  class BundleBarFoo extends Bundle {
+    val bar = UInt(16.W)
+    val foo = UInt(16.W)
+    override def cloneType = (new BundleBarFoo).asInstanceOf[this.type]
+  }
+  class BundleFoo extends Bundle {
+    val foo = UInt(16.W)
+    override def cloneType = (new BundleFoo).asInstanceOf[this.type]
+  }
+  class BundleBar extends Bundle {
+    val bar = UInt(16.W)
+    override def cloneType = (new BundleBar).asInstanceOf[this.type]
+  }
+
+  class MyModule(output: Bundle, input: Bundle) extends Module {
+    val io = IO(new Bundle {
+      val in = Input(input)
+      val out = Output(output)
+    })
+    io.out <> io.in
+  }
+
+  class BundleSerializationTest extends BasicTester {
+    // Note that foo is higher order because its defined earlier in the Bundle
+    val bundle = Wire(new BundleFooBar)
+    bundle.foo := 0x1234.U
+    bundle.bar := 0x5678.U
+    // To UInt
+    val uint = bundle.asUInt
+    assert(uint.getWidth == 32) // elaboration time
+    assert(uint === "h12345678".asUInt(32.W))
+    // Back to Bundle
+    val bundle2 = (new BundleFooBar).fromBits(uint)
+    assert(0x1234.U === bundle2.foo)
+    assert(0x5678.U === bundle2.bar)
+    stop()
+  }
+}
+
+class BundleSpec extends ChiselFlatSpec with BundleSpecUtils {
+  "Bundles with the same fields but in different orders" should "bulk connect" in {
+    elaborate { new MyModule(new BundleFooBar, new BundleBarFoo) }
+  }
+
+  "Bundles" should "follow UInt serialization/deserialization API" in {
+    assertTesterPasses { new BundleSerializationTest }
+  }
+
+  "Bulk connect on Bundles" should "check that the fields match" in {
+    (the [ChiselException] thrownBy {
+      elaborate { new MyModule(new BundleFooBar, new BundleFoo) }
+    }).getMessage should include ("Right Record missing field")
+
+    (the [ChiselException] thrownBy {
+      elaborate { new MyModule(new BundleFoo, new BundleFooBar) }
+    }).getMessage should include ("Left Record missing field")
+  }
+}