[clang-format] Add test for AlignAfterOpenBracket = AlwaysBreak in C++.

[jeanphilippeD]

Summary

Revision 251405 added AlwaysBreak to support Google's JavaScript style.
This changeset complete existing AlignsAfterOpenBracket tests to exercise AlwaysBreak for C++.

I thought this would be worthwhile.
With this option we can support request from http://lists.llvm.org/pipermail/cfe-dev/2015-May/042942.html, that had been requested a few times.
This also partially solve related Bug 23422 and is probably sufficient for most people.

AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
BinPackArguments = false;
BinPackParameters = false;

With these setting we obtain this formatting:

void fooWithAVeryLongParamList(
    int firstParameter,
    int secondParameter
    int lastParameter)
{
    object.alsoThisDoenstFitSoIBreakImmidiatly(
        firstParameter,
        secondParameter,
        lastParameter);
}

[jeanphilippeD]

Hi Daniel,
Realized that I should have added you when I submitted it.
Not sure if this review slipped through, or you were too busy, or if this change is not desired since the code was added to support JS.
Kind Regards,
Jean-Philippe.

[djasper]

Looks good.

[jeanphilippeD]

Thanks a lot, I do not have commit access.
I'm happy for you to commit it when you have time.

[djasper]

Submitted in r255486. Thank you.

unittests/Format/FormatTest.cpp

TEST_F(FormatTest, AlignsAfterOpenBracket) {
   verifyFormat(
       "SomeLongVariableName->someVeryLongFunctionName(aaaaaaaaaaa aaaaaaaaa,\n"
       "    aaaaaaaaaaa aaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
       Style);
   verifyFormat(
       "SomeLongVariableName->someFunction(foooooooo(aaaaaaaaaaaaaaa,\n"
       "    aaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa));",
       Style);
+
+  Style.AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
+  Style.BinPackArguments = false;
+  Style.BinPackParameters = false;
+  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
+               "    aaaaaaaaaaa aaaaaaaa,\n"
+               "    aaaaaaaaa aaaaaaa,\n"
+               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}",
+               Style);
+  verifyFormat("SomeLongVariableName->someVeryLongFunctionName(\n"
+               "    aaaaaaaaaaa aaaaaaaaa,\n"
+               "    aaaaaaaaaaa aaaaaaaaa,\n"
+               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
+               Style);
+  verifyFormat("SomeLongVariableName->someFunction(\n"
+               "    foooooooo(\n"
+               "        aaaaaaaaaaaaaaa,\n"
+               "        aaaaaaaaaaaaaaaaaaaaa,\n"
+               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa));",
+               Style);
 }
 
 TEST_F(FormatTest, ParenthesesAndOperandAlignment) {
   FormatStyle Style = getLLVMStyleWithColumns(40);
   verifyFormat("int a = f(aaaaaaaaaaaaaaaaaaaaaa &&\n"
                "          bbbbbbbbbbbbbbbbbbbbbb);",
                Style);
   Style.AlignAfterOpenBracket = FormatStyle::BAS_Align;