test/cli/unused_function_test.py: added more testing with --project= [skip ci]

Author: firewave

test/cli/unused_function_test.py

@@ -2,13 +2,39 @@
 # python3 -m pytest test-unused_function_test.py
 
 import os
+import json
 from testutils import cppcheck
 
 __script_dir = os.path.dirname(os.path.abspath(__file__))
 
 PROJECT_DIR = os.path.join(__script_dir, 'unusedFunction')
 
 
+# TODO: make this a generic helper function
+def __create_compdb(tmpdir, projpath):
+    compile_commands = os.path.join(tmpdir, 'compile_commands.json')
+    j = [
+        {
+            'directory': projpath,
+            'file': os.path.join(projpath, '1.c'),
+            'command': 'gcc -c 1.c'
+        },
+        {
+            'directory': projpath,
+            'file': os.path.join(projpath, '2.c'),
+            'command': 'gcc -c 2.c'
+        },
+        {
+            'directory': projpath,
+            'file': os.path.join(projpath, '3.c'),
+            'command': 'gcc -c 3.c'
+        }
+        ]
+    with open(compile_commands, 'wt') as f:
+        f.write(json.dumps(j, indent=4))
+    return compile_commands
+
+
 def test_unused_functions():
     ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', PROJECT_DIR])
     assert stdout.splitlines() == []
@@ -54,6 +80,37 @@ def test_unused_functions_project_j():
     assert ret == 0, stdout
 
 
+def test_unused_functions_compdb(tmpdir):
+    compdb_file = __create_compdb(tmpdir, PROJECT_DIR)
+    ret, stdout, stderr = cppcheck(['-q',
+                                    '--template=simple',
+                                    '--enable=unusedFunction',
+                                    '--inline-suppr',
+                                    '--project={}'.format(compdb_file)
+                                    ])
+    assert stdout.splitlines() == []
+    assert stderr.splitlines() == [
+        "{}/3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(PROJECT_DIR)
+    ]
+    assert ret == 0, stdout
+
+
+def test_unused_functions_compdb_j(tmpdir):
+    compdb_file = __create_compdb(tmpdir, PROJECT_DIR)
+    ret, stdout, stderr = cppcheck(['-q',
+                                    '--template=simple',
+                                    '--enable=unusedFunction',
+                                    '--inline-suppr',
+                                    '--project={}'.format(compdb_file),
+                                    '-j2'
+                                    ])
+    assert stdout.splitlines() == [
+        "cppcheck: unusedFunction check can't be used with '-j' option. Disabling unusedFunction check."
+    ]
+    assert stderr.splitlines() == []
+    assert ret == 0, stdout
+
+
 def test_unused_functions_builddir(tmpdir):
     build_dir = os.path.join(tmpdir, 'b1')
     os.mkdir(build_dir)
@@ -114,4 +171,42 @@ def test_unused_functions_builddir_project_j(tmpdir):
     ]
     assert ret == 0, stdout
 
-# TODO: test with FileSettings
+
+def test_unused_functions_builddir_compdb(tmpdir):
+    compdb_file = __create_compdb(tmpdir, PROJECT_DIR)
+    build_dir = os.path.join(tmpdir, 'b1')
+    os.mkdir(build_dir)
+    ret, stdout, stderr = cppcheck(['-q',
+                                    '--template=simple',
+                                    '--enable=unusedFunction',
+                                    '--inline-suppr',
+                                    '--project={}'.format(compdb_file),
+                                    '--cppcheck-build-dir={}'.format(build_dir)
+                                    ])
+    assert stdout.splitlines() == []
+    assert stderr.splitlines() == [
+        "{}/3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(PROJECT_DIR)
+    ]
+    assert ret == 0, stdout
+
+
+# TODO: only f3_3 is unused
+def test_unused_functions_builddir_compdb_j(tmpdir):
+    compdb_file = __create_compdb(tmpdir, PROJECT_DIR)
+    build_dir = os.path.join(tmpdir, 'b1')
+    os.mkdir(build_dir)
+    ret, stdout, stderr = cppcheck(['-q',
+                                    '--template=simple',
+                                    '--enable=unusedFunction',
+                                    '--inline-suppr',
+                                    '--project={}'.format(compdb_file),
+                                    '--cppcheck-build-dir={}'.format(build_dir),
+                                    '-j2'
+                                    ])
+    assert stdout.splitlines() == []
+    assert stderr.splitlines() == [
+        "{}/1.c:4:0: style: The function 'f1' is never used. [unusedFunction]".format(PROJECT_DIR),
+        "{}/2.c:4:0: style: The function 'f2' is never used. [unusedFunction]".format(PROJECT_DIR),
+        "{}/3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(PROJECT_DIR)
+    ]
+    assert ret == 0, stdout