Fix verifier logic for slots and different matchers

modules/mockk/src/commonMain/kotlin/io/mockk/impl/verify/UnorderedCallVerifier.kt

@@ -55,15 +55,17 @@ open class UnorderedCallVerifier(
         val allCallsForMock = stub.allRecordedCalls()
         val allCallsForMockMethod = stub.allRecordedCalls(matcher.method)
 
-        if(allCallsForMockMethod.size > 1 && matcher.args.any { it is CapturingSlotMatcher<*> }) {
+        val matchedCalls = allCallsForMockMethod.filter(matcher::match)
+
+        if(matchedCalls.size > 1 && matcher.args.any { it is CapturingSlotMatcher<*> }) {
             val msg = "$matcher execution is being verified more than once and its arguments are being captured with a slot.\n" +
                 "This will store only the argument of the last invocation in the slot.\n" +
                 "If you want to store all the arguments, use a mutableList to capture arguments."
             throw MockKException(msg)
         }
 
         val result = if (min == 0 && max == 0) {
-            if (!allCallsForMockMethod.any(matcher::match)) {
+            if (matchedCalls.isEmpty()) {
                 VerificationResult.OK(listOf())
             } else {
                 VerificationResult.Failure(
@@ -127,7 +129,6 @@ open class UnorderedCallVerifier(
                 }
             }
             else -> {
-                val matchedCalls = allCallsForMockMethod.filter(matcher::match)
                 val n = matchedCalls.count()
                 if (n in min..max) {
                     VerificationResult.OK(matchedCalls)
@@ -162,7 +163,7 @@ open class UnorderedCallVerifier(
         }
 
         captureBlocks.add {
-            for (call in allCallsForMockMethod) {
+            for (call in matchedCalls) {
                 matcher.captureAnswer(call)
             }
         }

modules/mockk/src/commonTest/kotlin/io/mockk/it/CaptureSubclassVerificationTest.kt

@@ -0,0 +1,80 @@
+package io.mockk.it
+
+import io.mockk.Runs
+import io.mockk.every
+import io.mockk.just
+import io.mockk.mockk
+import io.mockk.slot
+import io.mockk.verify
+import io.mockk.verifyOrder
+import io.mockk.verifySequence
+import kotlin.test.Test
+import kotlin.test.assertIs
+import kotlin.test.assertTrue
+
+/**
+ * See issue #774.
+ */
+class CaptureSubclassVerificationTest {
+
+    interface Interface
+
+    class Subclass1 : Interface
+
+    class Subclass2 : Interface
+
+    interface Service {
+        fun method(obj: Interface)
+    }
+
+    @Test
+    fun `test unordered`() {
+        val service = mockk<Service> {
+            every { method(any()) } just Runs
+        }
+
+        service.method(Subclass1())
+        service.method(Subclass2())
+
+        val slot = slot<Subclass2>()
+        verify(exactly = 1) { service.method(capture(slot)) }
+        assertTrue(slot.isCaptured)
+        assertIs<Subclass2>(slot.captured)
+    }
+
+    @Test
+    fun `test ordered`() {
+        val service = mockk<Service> {
+            every { method(any()) } just Runs
+        }
+
+        service.method(Subclass1())
+        service.method(Subclass2())
+
+        val slot = slot<Subclass2>()
+        verifyOrder {
+            service.method(any())
+            service.method(capture(slot))
+        }
+        assertTrue(slot.isCaptured)
+        assertIs<Subclass2>(slot.captured)
+    }
+
+    @Test
+    fun `test sequence`() {
+        val service = mockk<Service> {
+            every { method(any()) } just Runs
+        }
+
+        service.method(Subclass1())
+        service.method(Subclass2())
+
+        val slot = slot<Subclass2>()
+        verifySequence {
+            service.method(any())
+            service.method(capture(slot))
+        }
+        assertTrue(slot.isCaptured)
+        assertIs<Subclass2>(slot.captured)
+    }
+}

modules/mockk/src/commonTest/kotlin/io/mockk/it/CapturingTest.kt

@@ -85,8 +85,8 @@ class CapturingTest {
 
         assertFailsWith<MockKException> {
             verify {
-                mock.doSomething("1", capture(dataSlotId1))
-                mock.doSomething("2", capture(dataSlotId2))
+                mock.doSomething(any(), capture(dataSlotId1))
+                mock.doSomething(any(), capture(dataSlotId2))
             }
         }
     }
@@ -136,6 +136,8 @@ class CapturingTest {
             mock.doSomething("2", capture(slotList))
         }
 
+        // Each capture should have happened once because of different matchers for `id` argument
+        assertEquals(slotList.size, 2)
         assertEquals("data1", slotList[0])
         assertEquals("data2", slotList[1])
     }
@@ -158,6 +160,23 @@ class CapturingTest {
         assertEquals(args, list)
     }
 
+    @Test
+    fun itDoesNotThrowAMockkExceptionWhenVerifyingTheSameFunctionTwiceWithSlotsWithDifferentMatchers() {
+        mock.doSomething("1", "data1")
+        mock.doSomething("2", "data2")
+
+        val dataSlotId1 = slot<String>()
+        val dataSlotId2 = slot<String>()
+
+        verify {
+            mock.doSomething("1", capture(dataSlotId1))
+            mock.doSomething("2", capture(dataSlotId2))
+        }
+
+        assertEquals("data1", dataSlotId1.captured)
+        assertEquals("data2", dataSlotId2.captured)
+    }
+
     class MockNullableCls {
         fun call(unused: String?) {
             println(unused)