added test/cli/unused_function_test.py

Author: firewave

test/cli/unusedFunction/1.c

@@ -0,0 +1,7 @@
+#include "3.h"
+
+// cppcheck-suppress unusedFunction
+void f1()
+{
+    f3_1();
+}

test/cli/unusedFunction/2.c

@@ -0,0 +1,7 @@
+#include "3.h"
+
+// cppcheck-suppress unusedFunction
+void f2()
+{
+    f3_2();
+}

test/cli/unusedFunction/3.c

@@ -0,0 +1,3 @@
+void f3_1() {}
+void f3_2() {}
+void f3_3()  {}

test/cli/unusedFunction/3.h

@@ -0,0 +1,3 @@
+void f3_1();
+void f3_2();
+void f3_3();

test/cli/unused_function_test.py

@@ -0,0 +1,55 @@
+
+# python3 -m pytest test-unused_function_test.py
+
+import os
+from testutils import cppcheck
+
+__script_dir = os.path.dirname(os.path.abspath(__file__))
+
+PROJECT_DIR = os.path.join(__script_dir, 'unusedFunction')
+
+
+def test_unused_functions():
+    ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', PROJECT_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
+
+
+def test_unused_functions_j():
+    ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', '-j2', PROJECT_DIR])
+    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)
+    ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', '--cppcheck-build-dir={}'.format(build_dir), PROJECT_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_j(tmpdir):
+    build_dir = os.path.join(tmpdir, 'b1')
+    os.mkdir(build_dir)
+    ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', '-j2', '--cppcheck-build-dir={}'.format(build_dir), PROJECT_DIR])
+    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
+
+# TODO: test with project file
+# TODO: test with FileSettings