Add config parse test

Author: HazardyKnusperkeks

clang/include/clang/Format/Format.h

@@ -3270,6 +3270,9 @@ struct FormatStyle {
              Hex == R.Hex && HexMinDigits == R.HexMinDigits &&
              HexMaxDigitsNoSeparator == R.HexMaxDigitsNoSeparator;
     }
+    bool operator!=(const IntegerLiteralSeparatorStyle &R) const {
+      return !operator==(R);
+    }
   };
 
   /// Format integer literal separators (``'`` for C++ and ``_`` for C#, Java,

clang/unittests/Format/ConfigParseTest.cpp

@@ -1150,6 +1150,28 @@ TEST(ConfigParseTest, ParsesConfiguration) {
               FormatStyle::BLS_Block);
   CHECK_PARSE("Cpp11BracedListStyle: true", Cpp11BracedListStyle,
               FormatStyle::BLS_AlignFirstComment);
+
+  const FormatStyle::IntegerLiteralSeparatorStyle
+      ExpectedIntegerLiteralSeparatorStyle{/*Binary=*/2,
+                                           /*BinaryMinDigit=*/5,
+                                           /*BinaryMaxDigitNoSeparator=*/2,
+                                           /*Decimal=*/6,
+                                           /*DecimalMinDigit=*/6,
+                                           /*DecimalMaxDigitNoSeparator=*/3,
+                                           /*Hex=*/4,
+                                           /*HexMinDigit=*/2,
+                                           /*HexMaxDigitNoSeparator=*/1};
+  CHECK_PARSE("IntegerLiteralSeparator:\n"
+              "  Binary: 2\n"
+              "  BinaryMinDigits: 5\n"
+              "  BinaryMaxDigitsNoSeparator: 2\n"
+              "  Decimal: 6\n"
+              "  DecimalMinDigits: 6\n"
+              "  DecimalMaxDigitsNoSeparator: 3\n"
+              "  Hex: 4\n"
+              "  HexMinDigits: 2\n"
+              "  HexMaxDigitsNoSeparator: 1",
+              IntegerLiteralSeparator, ExpectedIntegerLiteralSeparatorStyle);
 }
 
 TEST(ConfigParseTest, ParsesConfigurationWithLanguages) {