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// See LICENSE for license details.
package chiselTests
import org.scalatest._
import chisel3._
import chisel3.testers.BasicTester
import chisel3.util._
class FailingAssertTester() extends BasicTester {
assert(false.B)
// Wait to come out of reset
val (_, done) = Counter(!reset, 4)
when (done) {
stop()
}
}
class SucceedingAssertTester() extends BasicTester {
assert(true.B)
// Wait to come out of reset
val (_, done) = Counter(!reset, 4)
when (done) {
stop()
}
}
class PipelinedResetModule extends Module {
val io = IO(new Bundle { })
val a = Reg(init = 0xbeef.U)
val b = Reg(init = 0xbeef.U)
assert(a === b)
}
// This relies on reset being asserted for 3 or more cycles
class PipelinedResetTester extends BasicTester {
val module = Module(new PipelinedResetModule)
module.reset := Reg(next = Reg(next = Reg(next = reset)))
val (_, done) = Counter(!reset, 4)
when (done) {
stop()
}
}
class ModuloAssertTester extends BasicTester {
assert((4.U % 2.U) === 0.U)
assert(1.U === 1.U, "I'm 110% sure this will succeed")
stop()
}
class AssertSpec extends ChiselFlatSpec {
"A failing assertion" should "fail the testbench" in {
assert(!runTester{ new FailingAssertTester })
}
"A succeeding assertion" should "not fail the testbench" in {
assertTesterPasses{ new SucceedingAssertTester }
}
"An assertion" should "not assert until we come out of reset" in {
assertTesterPasses{ new PipelinedResetTester }
}
"Assertions" should "allow the modulo operator % in the message" in {
assertTesterPasses{ new ModuloAssertTester }
}
}
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