Cannot mock class that uses the "pimp my library" pattern

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ScalaMock Version (e.g. 3.5.0)

5.1.0

Scala Version (e.g. 2.12)

2.12.13

Runtime (JVM or JS)

JVM

Please describe the expected behavior of the issue

Scalamock should be able to see the methods added by the implicit class.

Please provide a description of what actually happens

A java.lang.NoSuchMethodException is thrown.

Reproducible Test Case

Please provide a minimised code snippet that fails, ideally, written as a failing test case in ScalaTest. This will help us a lot in diagnosing the problem and work on a fix. If the issue is more complex or requires configuration, please provide a link to a project on Github that reproduces the issue.

  class Greeter {
    def sayHello(name: String): String =
      s"Hello $name!"
  }

  object PimpedLibrary {
    implicit class AdditionalMethods(greeter: Greeter) {
      def enhancedSayHello(name: String, message: String): String =
        s"${greeter.sayHello(name)}, $message"
    }
  }

  class ClassUnderTest {
    import PimpedLibrary._

    def methodUnderTest(greeter: Greeter): String =
      greeter.enhancedSayHello("world", "how are you today?")
  }

  "Greeter" in {
    import PimpedLibrary._

    val mockGreeter = mock[Greeter]

    val expectedName = "world"
    val expectedMessage = "how are you today?"
    val expectedResult = s"$expectedName, $expectedMessage"

    val classUnderTest = new ClassUnderTest()

    (mockGreeter.enhancedSayHello(_: String, _: String))
      .expects(expectedName, expectedMessage)
      .returning(expectedResult)

    classUnderTest.methodUnderTest(mockGreeter) shouldEqual expectedResult
  }

paulbutcher / ScalaMock