add python tests

Author: ludviggunne

test/cli/duplicates/compile_commands_duplicates.json

@@ -0,0 +1,12 @@
+[
+{
+  "directory": "./.",
+  "command": "/usr/bin/c++  -std=gnu++11 -c ./main.cpp",
+  "file": "./main.cpp"
+},
+{
+  "directory": "./.",
+  "command": "/usr/bin/c++ -std=gnu++11 -c ./main.cpp",
+  "file": "./main.cpp"
+}
+]

test/cli/duplicates/compile_commands_no_duplicates.json

@@ -0,0 +1,12 @@
+[
+{
+  "directory": "./.",
+  "command": "/usr/bin/c++  -std=gnu++11 -c ./main.cpp",
+  "file": "./main.cpp"
+},
+{
+  "directory": "./.",
+  "command": "/usr/bin/c++ -DHELLO -std=gnu++11 -c ./main.cpp",
+  "file": "./main.cpp"
+}
+]

test/cli/duplicates/main.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main(int argc, char **argv)
+{
+    std::cout << "Hello, world!" << std::endl;
+}

test/cli/duplicates_test.py

@@ -0,0 +1,52 @@
+
+# python -m pytest test-helloworld.py
+
+import os
+
+from testutils import cppcheck
+
+__script_dir = os.path.dirname(os.path.abspath(__file__))
+__proj_dir = os.path.join(__script_dir, 'duplicates')
+
+def test_project_duplicates():
+    args = ['--project=compile_commands_duplicates.json']
+    ret, stdout, _ = cppcheck(args, cwd=__proj_dir)
+    assert ret == 0
+    assert stdout.count('main.cpp') == 1
+
+def test_project_duplicates_recheck():
+    args = [
+        '--project=compile_commands_duplicates.json',
+        '--recheck-project-duplicates'
+    ]
+    ret, stdout, _ = cppcheck(args, cwd=__proj_dir)
+    assert ret == 0
+    assert stdout.count('main.cpp') > 1
+
+def test_project_no_duplicates():
+    args = ['--project=compile_commands_no_duplicates.json']
+    ret, stdout, _ = cppcheck(args, cwd=__proj_dir)
+    assert ret == 0
+    assert stdout.count('main.cpp') > 1
+
+def test_project_duplicates_builddir(tmpdir):
+    args = [
+        '--project=compile_commands_duplicates.json',
+        f'--cppcheck-build-dir={tmpdir}'
+    ]
+    ret, _, _ = cppcheck(args, cwd=__proj_dir)
+    assert ret == 0
+    files = os.listdir(tmpdir)
+    assert 'main.a1' in files
+    assert 'main.a2' not in files
+
+def test_project_no_duplicates_builddir(tmpdir):
+    args = [
+        '--project=compile_commands_no_duplicates.json',
+        f'--cppcheck-build-dir={tmpdir}'
+    ]
+    ret, _, _ = cppcheck(args, cwd=__proj_dir)
+    assert ret == 0
+    files = os.listdir(tmpdir)
+    assert 'main.a1' in files
+    assert 'main.a2' in files