Add unittest related test

doctest/.clang-format

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+# http://clang.llvm.org/docs/ClangFormatStyleOptions.html
+
+DisableFormat: false
+Language: Cpp
+Standard: Cpp03
+IndentWidth: 4
+TabWidth: 4
+UseTab: Never
+ColumnLimit: 100
+ReflowComments: false
+SortIncludes: false
+
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: true
+AlignEscapedNewlinesLeft: false
+AlignOperands: true
+AlignTrailingComments: true
+AlignAfterOpenBracket: true
+DerivePointerAlignment: false
+PointerAlignment: Left
+IndentCaseLabels: true
+ContinuationIndentWidth: 8
+NamespaceIndentation: Inner
+AccessModifierOffset: -4
+
+SpaceAfterControlStatementKeyword: false
+SpaceAfterCStyleCast: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: Never
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Cpp11BracedListStyle: true
+
+KeepEmptyLinesAtTheStartOfBlocks: false
+MaxEmptyLinesToKeep: 1
+BinPackArguments: true
+BinPackParameters: true
+AlwaysBreakAfterReturnType: None
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakTemplateDeclarations: true
+BreakConstructorInitializersBeforeComma: true
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 8
+
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AllowShortBlocksOnASingleLine: true
+AllowShortCaseLabelsOnASingleLine: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortFunctionsOnASingleLine: All
+
+BreakBeforeBinaryOperators: false
+BreakBeforeTernaryOperators: false
+BreakStringLiterals: true
+BreakBeforeBraces: Custom
+BraceWrapping:
+    AfterClass: true
+    AfterEnum: true
+    AfterNamespace: true
+    AfterStruct: true
+    AfterUnion: true
+
+    BeforeCatch: false
+    BeforeElse: false
+    IndentBraces: false
+    AfterFunction: false
+    AfterControlStatement: false
+
+# penalties not thought of yet
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 60
+PenaltyBreakString: 1000
+PenaltyBreakFirstLessLess: 120
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 1000

doctest/.gitattributes

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+* text=auto

doctest/.gitignore

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+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+# Text garbage
+*.ii
+*.s
+
+# My garbage :)
+Win32/
+x64/
+doctest_with_main.dir/
+scripts/bench/project/*
+scripts/bench/catch*.hpp
+scripts/bench/results.txt
+build/
+build-mingw/
+*.pyc