您如何阅读 gcno 和 gdna 文件以查看测试覆盖率？

如何解决您如何阅读 gcno 和 gdna 文件以查看测试覆盖率？

我正在使用 gcovr 来尝试查看我的测试覆盖代码库的程度。事实上，我有一个超小测试，所以我希望 gcovr 返回一个非常小的数字，可能不到一个百分比。

我编译时启用了在每个编译单元中启用的 --coverage 标志，并且在每个链接命令上都启用了 -lgcov 标志。然后我运行了可执行文件和测试并生成了 gcno 和 gdna 文件。

然后我做：

gcovr --root ../Src/ ../Src/ ./GeometryTests.p
------------------------------------------------------------------------------
                           GCC Code Coverage Report
Directory: ../Src/
------------------------------------------------------------------------------
File                                       Lines    Exec  Cover   Missing
------------------------------------------------------------------------------
Engine/Geometry/GeometryUtils.hpp             18      18   100%   
Engine/Geometry/tests/GeometryTests.cpp        3       3   100%   
Engine/Geometry/tests/TestsGeometryUtils.cpp
                                              18      18   100%   
------------------------------------------------------------------------------
TOTAL                                         39      39   100%
-----------------------------------------------------------------------------

这是不对的，我有几十个文件，而我的小测试只测试了 2 个函数，这显然是错误的。

然后我尝试了：

 gcovr --root ../Src/ ../Src/ ./GeometryTests.p ./SponzaScene.p
------------------------------------------------------------------------------
                           GCC Code Coverage Report
Directory: ../Src/
------------------------------------------------------------------------------
File                                       Lines    Exec  Cover   Missing
------------------------------------------------------------------------------
Engine/Animation/GltfLib.hpp                   1       1   100%   
Engine/Animation/Image/CpuImage.hpp            1       1   100%   
Engine/Geometry/GeometryUtils.hpp             18      18   100%   
Engine/Geometry/HMesh.hpp                    592       0     0%   37,87-89,92-94,96-98,100-101,103,105-107,110,114-118,121,123-125,127,129,132-133,135,137-139,141,143,146,148-150,174-176,180,182-184,186,188-190,192,194-196,198,200-201,203,205-206,208,210,212-213,215,217-218,220,222-223,225,227-228,230,232-233,236,238-239,241,243-244,246,248-249,251,253-254,256,258-259,261,263,265,267-268,271,273,275,277,280,282,285,291,297-298,309,311,313,315,317-318,320,322-324,326-327,329,332,334,336-343,345,348,350-351,354,357,359-360,362,365,367-368,370,373,375-376,378,381,383-384,386,398,410,413-418,420,429-432,434-437,439-441,445,559,561,563-564,566-571,573-574,577-578,580,584,587-588,590-591,593,595-596,598-600,604-605,609,612,614,616-618,620,622-625,631,635-641,643-648,651-653,657-659,661-662,665-670,672-675,677-678,682-684,686-690,692-695,697-699,701-704,706-707,709-711,715,718-719,721-725,727-729,732,737,741-745,747-750,753-755,757-758,760,763-768,770-772,774,778-780,782-788,790-792,794-796,798-800,802,804,808,811-813,815-821,823-828,830-832,834-836,838-840,842-844,846-848,850-852,854-856,858-860,865,867-868,870-871,873,876,882,885-886,888,890-892,895,897,900,913,916-917,919-920,924,926-927,931,933-934,938,941-943,945,947-949,953,955-956,961,969-973,975-976,978,980-983,986,988,990-992,994,996-997,999,1002-1003,1007,1009-1010,1015-1026,1028,1030,1032,1034-1036,1039,1041-1042,1044-1045,1048,1050,1052-1057,1059,1062,1067-1068,1070-1071,1075,1079-1080,1082,1084-1086,1088,1090-1091,1094-1096,1099-1101,1104-1108,1113,1115-1117,1119-1121,1125,1127,1130-1131,1135,1138,1141,1145-1146,1148-1151,1153-1155,1157,1162,1164-1170,1175,1177-1183,1188,1191-1192,1194,1196,1198-1200,1202-1204,1206-1208,1210-1213,1215-1217,1220,1222,1228,1230-1231,1233-1236,1238-1239,1241-1243,1246-1248,1252,1254-1259,1263,1266-1268,1270-1273,1275,1279,1281-1282,1285-1286
Engine/Geometry/tests/GeometryTests.cpp        3       3   100%   
Engine/Geometry/tests/TestsGeometryUtils.cpp
                                              18      18   100%   
Engine/Helpers/EigenHelpers.hpp                4       0     0%   187,189,195
Engine/Renderer/Camera/Camera.hpp             13      12    92%   46
Engine/Renderer/IO/Window.hpp                  3       3   100%   
Engine/Renderer/Renderer.hpp                   7       7   100%   
Engine/Renderer/Rendering/Effects.hpp         35      35   100%   
Engine/Renderer/Rendering/Gallery.hpp         82      78    95%   294-296,298
Engine/Renderer/Rendering/RenderTargetStorage.hpp
                                               1       1   100%   
Engine/Renderer/Rendering/VulkanLayer/Image.hpp
                                               1       1   100%   
Engine/Renderer/Rendering/VulkanLayer/Memory.hpp
                                               3       3   100%   
Engine/Renderer/Rendering/VulkanLayer/RenderTarget.hpp
                                               1       1   100%   
Engine/Renderer/Rendering/VulkanLayer/RenderingPipeline.hpp
                                               3       3   100%   
Engine/Renderer/Rendering/VulkanLayer/ShaderProgram.hpp
                                               1       1   100%   
Engine/Renderer/Rendering/VulkanLayer/Utils.hpp
                                               5       5   100%   
Engine/Shared/Shared.hpp                       8       3    37%   71,73,181,184-185
examples/SponzaScene/sponza_scene.cpp        180     172    95%   236,240,242-243,245-246,341,343
------------------------------------------------------------------------------
TOTAL                                        980     366    37%
------------------------------------------------------------------------------

至少不是 100%，但我可以保证我的测试不会触及大多数文件，我不太明白我应该如何设置编译、链接和 gcovr 调用来分析测试覆盖率。

解决方法

看起来之前的结果没有被清除。尝试使用 -ftest-coverage 编译 也许 lcov + htmlgen 对你有用。 下面是一个例子：

 $('#infodiv').toggle();