test: add overlapping interface regression

Author: notanengineercom

spec/regression/overlap.spec.ts

@@ -0,0 +1,54 @@
+import test from 'ava'
+
+import { Substitute, received, didNotReceive } from '../../src'
+
+export interface OverlappingInterface {
+  received(value: number): string
+  didNotReceive(): unknown
+  clearReceivedCalls(): void
+}
+
+test('(clearReceivedCalls) handles overlaps safely without substitutions', t => {
+  const substitute = Substitute.for<Omit<OverlappingInterface, 'received'>>()
+  substitute.clearReceivedCalls()
+  t.notThrows(() => substitute.received(1).clearReceivedCalls())
+  t.throws(() => substitute[didNotReceive]().clearReceivedCalls())
+  })
+
+test('(clearReceivedCalls) handles overlaps safely with substitutions', t => {
+  const substitute = Substitute.for<Omit<OverlappingInterface, 'received'>>()
+  substitute.clearReceivedCalls().returns()
+  substitute.clearReceivedCalls()
+  t.notThrows(() => substitute.received(1).clearReceivedCalls())
+  t.throws(() => substitute[didNotReceive]().clearReceivedCalls())
+})
+
+test('(received) handles overlaps safely without substitutions', t => {
+  const substitute = Substitute.for<Omit<OverlappingInterface, 'didNotReceive'>>()
+  substitute.received(10)
+  t.notThrows(() => substitute[received](1).received(10))
+  t.throws(() => substitute.didNotReceive().received(10))
+})
+
+test('(received) handles overlaps safely with substitutions', t => {
+  const substitute = Substitute.for<Omit<OverlappingInterface, 'didNotReceive'>>()
+  substitute.received(10).returns('foo')
+  t.is('foo', substitute.received(10))
+  t.notThrows(() => substitute[received](1).received(10))
+  t.throws(() => substitute.didNotReceive().received(10))
+})
+
+test('(didNotReceive) handles overlaps safely without substitutions', t => {
+  const substitute = Substitute.for<Omit<OverlappingInterface, 'received'>>()
+  substitute.didNotReceive()
+  t.notThrows(() => substitute.received(1).didNotReceive())
+  t.throws(() => substitute[didNotReceive]().didNotReceive())
+})
+
+test('(didNotReceive) handles overlaps safely with substitutions', t => {
+  const substitute = Substitute.for<Omit<OverlappingInterface, 'received'>>()
+  substitute.didNotReceive().returns('foo')
+  t.is('foo' as unknown, substitute.didNotReceive())
+  t.notThrows(() => substitute.received(1).didNotReceive())
+  t.throws(() => substitute[didNotReceive]().didNotReceive())
+})

spec/regression/returns.spec.ts

@@ -1,7 +1,7 @@
 import test from 'ava'
 import { types } from 'util'
 
-import { Substitute, Arg, returns } from '../../src'
+import { Substitute, Arg } from '../../src'
 
 interface Calculator {
   add(a: number, b: number): number