2 files changed, 181 insertions, 0 deletions
diff --git a/src/main/scala/chisel3/compatibility.scala b/src/main/scala/chisel3/compatibility.scala
index 35c44330..8524ea2a 100644
--- a/src/main/scala/chisel3/compatibility.scala
+++ b/src/main/scala/chisel3/compatibility.scala
@@ -4,6 +4,7 @@
 // moving to the more standard package naming convention chisel3 (lowercase c).
 
 package object Chisel {     // scalastyle:ignore package.object.name
+  import chisel3.NotStrict.CompileOptions
   type Direction = chisel3.core.Direction
   val INPUT = chisel3.core.Direction.Input
   val OUTPUT = chisel3.core.Direction.Output
diff --git a/src/test/scala/chiselTests/CompileOptionsTest.scala b/src/test/scala/chiselTests/CompileOptionsTest.scala
new file mode 100644
index 00000000..5bd3f959
--- /dev/null
+++ b/src/test/scala/chiselTests/CompileOptionsTest.scala
@@ -0,0 +1,180 @@
+// See LICENSE for license details.
+
+package chiselTests
+
+import org.scalatest._
+import chisel3._
+import chisel3.core.Binding.BindingException
+import chisel3.testers.BasicTester
+
+class CompileOptionsSpec extends ChiselFlatSpec {
+
+  class SmallBundle extends Bundle {
+    val f1 = UInt(width = 4)
+    val f2 = UInt(width = 5)
+    override def cloneType: this.type = (new SmallBundle).asInstanceOf[this.type]
+  }
+  class BigBundle extends SmallBundle {
+    val f3 = UInt(width = 6)
+    override def cloneType: this.type = (new BigBundle).asInstanceOf[this.type]
+  }
+
+  "A Module with missing bundle fields when compiled with Strict.CompileOption " should "throw an exception" in {
+    a [ChiselException] should be thrownBy {
+      import chisel3.Strict.CompileOptions
+
+      class ConnectFieldMismatchModule extends Module {
+        val io = IO(new Bundle {
+          val in = Input(new SmallBundle)
+          val out = Output(new BigBundle)
+        })
+        io.out := io.in
+      }
+      elaborate { new ConnectFieldMismatchModule() }
+    }
+  }
+
+  "A Module with missing bundle fields when compiled with NotStrict.CompileOption " should "not throw an exception" in {
+    import chisel3.NotStrict.CompileOptions
+
+    class ConnectFieldMismatchModule extends Module {
+      val io = IO(new Bundle {
+        val in = Input(new SmallBundle)
+        val out = Output(new BigBundle)
+      })
+      io.out := io.in
+    }
+    elaborate { new ConnectFieldMismatchModule() }
+  }
+
+  "A Module in which a Reg is created with a bound type when compiled with Strict.CompileOption " should "throw an exception" in {
+    a [BindingException] should be thrownBy {
+      import chisel3.Strict.CompileOptions
+
+      class CreateRegFromBoundTypeModule extends Module {
+        val io = IO(new Bundle {
+          val in = Input(new SmallBundle)
+          val out = Output(new BigBundle)
+        })
+        val badReg = Reg(UInt(7, width=4))
+      }
+      elaborate { new CreateRegFromBoundTypeModule() }
+    }
+  }
+
+  "A Module in which a Reg is created with a bound type when compiled with NotStrict.CompileOption " should "not throw an exception" in {
+    import chisel3.NotStrict.CompileOptions
+
+    class CreateRegFromBoundTypeModule extends Module {
+      val io = IO(new Bundle {
+        val in = Input(new SmallBundle)
+        val out = Output(new BigBundle)
+      })
+      val badReg = Reg(UInt(7, width=4))
+    }
+    elaborate { new CreateRegFromBoundTypeModule() }
+  }
+
+
+  "A Module with wrapped IO when compiled with Strict.CompileOption " should "not throw an exception" in {
+    import chisel3.Strict.CompileOptions
+
+    class RequireIOWrapModule extends Module {
+      val io = IO(new Bundle {
+        val in = UInt(width = 32).asInput
+        val out = Bool().asOutput
+      })
+      io.out := io.in(1)
+    }
+    elaborate { new RequireIOWrapModule() }
+}
+
+  "A Module with unwrapped IO when compiled with NotStrict.CompileOption " should "not throw an exception" in {
+    import chisel3.NotStrict.CompileOptions
+
+    class RequireIOWrapModule extends Module {
+      val io = new Bundle {
+        val in = UInt(width = 32).asInput
+        val out = Bool().asOutput
+      }
+      io.out := io.in(1)
+    }
+      elaborate { new RequireIOWrapModule() }
+  }
+
+  "A Module connecting output as source to input as sink when compiled with Strict.CompileOption " should "throw an exception" in {
+    a [ChiselException] should be thrownBy {
+      import chisel3.Strict.CompileOptions
+
+      class SimpleModule extends Module {
+        val io = IO(new Bundle {
+          val in = Input(UInt(width = 3))
+          val out = Output(UInt(width = 4))
+        })
+      }
+      class SwappedConnectionModule extends SimpleModule {
+        val child = Module(new SimpleModule)
+        io.in := child.io.out
+      }
+      elaborate { new SwappedConnectionModule() }
+    }
+  }
+
+  "A Module connecting output as source to input as sink when compiled with NotStrict.CompileOption " should "not throw an exception" in {
+    import chisel3.NotStrict.CompileOptions
+
+    class SimpleModule extends Module {
+      val io = IO(new Bundle {
+        val in = Input(UInt(width = 3))
+        val out = Output(UInt(width = 4))
+      })
+    }
+    class SwappedConnectionModule extends SimpleModule {
+      val child = Module(new SimpleModule)
+      io.in := child.io.out
+    }
+    elaborate { new SwappedConnectionModule() }
+  }
+
+  "A Module with directionless connections when compiled with Strict.CompileOption " should "throw an exception" in {
+    a [ChiselException] should be thrownBy {
+      import chisel3.Strict.CompileOptions
+
+      class SimpleModule extends Module {
+        val io = IO(new Bundle {
+          val in = Input(UInt(width = 3))
+          val out = Output(UInt(width = 4))
+        })
+        val noDir = Wire(UInt(width = 3))
+      }
+
+      class DirectionLessConnectionModule extends SimpleModule {
+        val a = UInt(0, width = 3)
+        val b = Wire(UInt(width = 3))
+        val child = Module(new SimpleModule)
+        b := child.noDir
+      }
+      elaborate { new DirectionLessConnectionModule() }
+    }
+  }
+
+  "A Module with directionless connections when compiled with NotStrict.CompileOption " should "not throw an exception" in {
+    import chisel3.NotStrict.CompileOptions
+
+    class SimpleModule extends Module {
+      val io = IO(new Bundle {
+        val in = Input(UInt(width = 3))
+        val out = Output(UInt(width = 4))
+      })
+      val noDir = Wire(UInt(width = 3))
+    }
+
+    class DirectionLessConnectionModule extends SimpleModule {
+      val a = UInt(0, width = 3)
+      val b = Wire(UInt(width = 3))
+      val child = Module(new SimpleModule)
+      b := child.noDir
+    }
+    elaborate { new DirectionLessConnectionModule() }
+  }
+}