Test GcovImporter thoroughly

Author: xaizek

tests/GcovImporter.cpp

@@ -0,0 +1,125 @@
+// Copyright (C) 2021 xaizek <xaizek@posteo.net>
+//
+// This file is part of uncov.
+//
+// uncov is free software: you can redistribute it and/or modify
+// it under the terms of version 3 of the GNU Affero General Public License as
+// published by the Free Software Foundation.
+//
+// uncov is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with uncov.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "Catch/catch.hpp"
+
+#include <boost/filesystem/operations.hpp>
+#include <boost/filesystem/path.hpp>
+#include <boost/scope_exit.hpp>
+
+#include <fstream>
+#include <stdexcept>
+#include <string>
+
+#include "utils/fs.hpp"
+#include "GcovImporter.hpp"
+
+#include "TestUtils.hpp"
+
+namespace fs = boost::filesystem;
+
+TEST_CASE("Need support for at least one intermediate format", "[GcovImporter]")
+{
+    GcovInfo gcovInfo(/*employBinning=*/false, /*jsonFormat=*/false,
+                      /*intermediateFormat=*/false);
+    REQUIRE_THROWS_AS(GcovImporter("", "", {}, "", gcovInfo),
+                      const std::runtime_error &);
+}
+
+TEST_CASE("Plain text format parsed and binning is performed", "[GcovImporter]")
+{
+    TempDir tempDir("gcovimporter");
+    std::string tempDirPath = tempDir;
+
+    fs::create_directory(tempDirPath + "/src");
+    fs::create_directory(tempDirPath + "/tests");
+
+    std::ofstream{tempDirPath + "/src/file.gcno"} << "\n";
+    std::ofstream{tempDirPath + "/tests/file.gcno"} << "\n";
+
+    auto runner = [](std::vector<std::string> &&cmd, const std::string &dir) {
+        CHECK(cmd.size() == 5);
+
+        const fs::path inPath = cmd.back();
+        const fs::path relPath = inPath.parent_path().filename().string()
+                               / inPath.filename();
+        const std::string outName = inPath.parent_path().filename().string()
+                                  + inPath.filename().string();
+        const std::string outPath = dir + '/' + outName + ".gcov";
+
+        std::ofstream{outPath}
+            << "file:" << relPath.string() << '\n'
+            << "lcount:1,1\n"
+            << "lcount:2,0\n";
+    };
+    auto prevRunner = GcovImporter::setRunner(runner);
+    BOOST_SCOPE_EXIT_ALL(prevRunner) {
+        GcovImporter::setRunner(prevRunner);
+    };
+
+    GcovInfo gcovInfo(/*employBinning=*/true, /*jsonFormat=*/false,
+                      /*intermediateFormat=*/true);
+    std::vector<File> files =
+        GcovImporter(tempDirPath, tempDirPath, {}, tempDirPath,
+                     gcovInfo).getFiles();
+
+    REQUIRE(files.size() == 2);
+    CHECK(files[0].getCoveredCount() == 1);
+    CHECK(files[0].getMissedCount() == 1);
+    CHECK(files[1].getCoveredCount() == 1);
+    CHECK(files[1].getMissedCount() == 1);
+}
+
+TEST_CASE("JSON format is parsed", "[GcovImporter]")
+{
+    TempDir tempDir("gcovimporter");
+    std::string tempDirPath = tempDir;
+
+    std::ofstream{tempDirPath + "/file.gcno"} << "\n";
+
+    auto runner = [](std::vector<std::string> &&/*cmd*/,
+                     const std::string &dir) {
+        makeGz(dir + "/out.gcov.json.gz", R"({
+            "files": [
+                {
+                    "file": "file.gcno",
+                    "lines": [
+                        { "line_number": 1, "count": 1 },
+                        { "line_number": 2, "count": 0 }
+                    ]
+                },
+                {
+                    "file": "/usr/include/whatever.h",
+                    "lines": [ { "line_number": 1, "count": 1 } ]
+                }
+            ]
+        })");
+    };
+    auto prevRunner = GcovImporter::setRunner(runner);
+    BOOST_SCOPE_EXIT_ALL(prevRunner) {
+        GcovImporter::setRunner(prevRunner);
+    };
+
+    GcovInfo gcovInfo(/*employBinning=*/false, /*jsonFormat=*/true,
+                      /*intermediateFormat=*/true);
+    std::vector<File> files =
+        GcovImporter(tempDirPath, tempDirPath, {}, tempDirPath,
+                     gcovInfo).getFiles();
+
+    REQUIRE(files.size() == 1);
+    CHECK(files[0].getCoveredCount() == 1);
+    CHECK(files[0].getMissedCount() == 1);
+}