Add extra unit test.

- Confirm User's poor data can be captured with an increased tolerance value of 10% extra.

Ref #1289

test/ir_Mirage_test.cpp

@@ -79,3 +79,46 @@ TEST(TestDecodeMirage, SyntheticExample) {
       "",
       IRAcUtils::resultAcToString(&irsend.capture));
 }
+
+// Data from:
+//   https://github.com/crankyoldgit/IRremoteESP8266/issues/1289#issuecomment-705624234
+TEST(TestDecodeMirage, RealExampleWithDodgyHardwareCapture) {
+  IRsendTest irsend(kGpioUnused);
+  IRrecv irrecv(kGpioUnused);
+  const uint16_t rawData[243] = {
+      8360, 4248, 582, 518, 556, 1582, 586, 1572, 528, 572, 556, 1590, 526, 572,
+      554, 1586, 528, 578, 558, 1582, 556, 542, 558, 1598, 528, 572, 556, 1590,
+      528, 1610, 556, 1600, 554, 546, 556, 544, 558, 542, 558, 542, 676, 400,
+      606, 492, 582, 542, 556, 544, 556, 542, 558, 544, 556, 542, 556, 544, 558,
+      542, 556, 544, 530, 570, 586, 516, 584, 514, 558, 542, 558, 542, 558, 542,
+      554, 546, 558, 542, 558, 1582,
+      734, 342,  // Really poor data here.
+      580, 552, 528, 1610, 556, 544, 554, 546, 554, 544, 556, 544, 556, 544,
+      558, 542, 558, 552, 558, 542, 558, 542, 558, 542, 556, 544, 558, 542, 558,
+      542, 554, 544, 584, 516, 558, 542, 528, 572, 588, 512, 556, 544, 532, 568,
+      560, 542, 558, 542, 560, 540, 560, 538, 530, 570, 558, 542, 558, 542, 560,
+      540, 558, 542, 558, 542, 530, 568, 558, 542, 558, 542, 532, 570, 530, 570,
+      558, 542, 558, 542, 558, 542, 530, 570, 530, 568, 560, 540, 560, 540, 532,
+      568, 558, 542, 558, 542, 532, 568, 560, 542, 532, 568, 532, 568, 530, 570,
+      532, 570, 530, 570, 558, 540, 560, 540, 558, 534, 558, 542, 556, 1600,
+      558, 1592, 558, 542, 560, 1590, 530, 570, 530, 570, 556, 544, 560, 540,
+      556, 544, 558, 1582, 556, 544, 558, 1600, 556, 542, 560, 542, 532, 568,
+      558, 542, 610, 1538, 504, 1646, 582, 518, 528, 572, 528, 1612, 556, 544,
+      528, 580, 554};  // UNKNOWN 28DACDC4
+  const uint8_t expected[kMirageStateLength] = {
+      0x6A, 0xAE, 0x00, 0x00, 0x04, 0x80, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x68, 0x28, 0x64};
+  irrecv.setTolerance(kTolerance + 10);  // Bump tolerance to match poor data.
+  irsend.begin();
+  irsend.reset();
+  irsend.sendRaw(rawData, 243, 38);
+  irsend.makeDecodeResult();
+
+  ASSERT_TRUE(irrecv.decode(&irsend.capture));
+  ASSERT_EQ(decode_type_t::MIRAGE, irsend.capture.decode_type);
+  ASSERT_EQ(kMirageBits, irsend.capture.bits);
+  EXPECT_STATE_EQ(expected, irsend.capture.state, irsend.capture.bits);
+  EXPECT_EQ(
+      "",
+      IRAcUtils::resultAcToString(&irsend.capture));
+}