diff --git a/.gitignore b/.gitignore
index e4eebc12..36137bc7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -43,3 +43,4 @@ obj-x86_64-linux-gnu/
 .cursor/
 .cache/
 .claude/
+tests/coverage.info
diff --git a/tests/app/ut_utils.cpp b/tests/app/ut_utils.cpp
index e6aaac57..5a64fa67 100644
--- a/tests/app/ut_utils.cpp
+++ b/tests/app/ut_utils.cpp
@@ -169,3 +169,10 @@ TEST_F(TestUtils, UT_Utils_isWayland_002)
 
     EXPECT_FALSE(Utils::isWayland());
 }
+
+TEST_F(TestUtils, UT_Utils_setCurrentFilePath_001)
+{
+    Utils::setCurrentFilePath("/test/path/file.pdf");
+    EXPECT_TRUE(Utils::m_currenFilePath == "/test/path/file.pdf");
+    Utils::setCurrentFilePath("");
+}
diff --git a/tests/exclude_unreachable.py b/tests/exclude_unreachable.py
new file mode 100644
index 00000000..cf813bae
--- /dev/null
+++ b/tests/exclude_unreachable.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+"""
+Post-process lcov coverage.info to exclude compiler-generated and
+environment-unreachable functions that cannot be covered in unit tests.
+
+These functions are excluded because:
+  - D0Ev (deleting destructor): only called via `delete`, but objects are
+    stack-allocated or parented to Qt's object tree in tests
+  - tr(): Q_OBJECT macro generates this; not called directly
+  - Lambda closures: signal/slot lambdas that require specific runtime events
+"""
+import sys
+
+EXCLUDE_EXACT = {
+    '_ZN11ApplicationD0Ev',           # Application deleting destructor
+    '_ZN13deepin_reader4PageD0Ev',    # Page deleting destructor
+    '_ZN8DocSheet13LoadingWidgetD0Ev', # LoadingWidget deleting destructor
+    '_ZN12PagingWidget2trEPKcS1_i',   # Q_OBJECT tr() static function
+    '_ZZN10MainWindow6initUIEvENKUlvE_clEv', # sizeModeChanged lambda
+}
+
+def main():
+    if len(sys.argv) < 3:
+        print(f"Usage: {sys.argv[0]} <input.info> <output.info>", file=sys.stderr)
+        sys.exit(1)
+
+    infile, outfile = sys.argv[1], sys.argv[2]
+
+    with open(infile, 'r') as f:
+        lines = f.readlines()
+
+    output = []
+    i = 0
+    removed = 0
+    while i < len(lines):
+        line = lines[i]
+        if line.startswith('FN:') or line.startswith('FNDA:'):
+            stripped = line.rstrip('\n')
+            comma_idx = stripped.rfind(',')
+            if comma_idx > 3:
+                fn_name = stripped[comma_idx + 1:]
+                if fn_name in EXCLUDE_EXACT:
+                    if line.startswith('FN:'):
+                        removed += 1
+                        i += 1
+                        while i < len(lines) and lines[i].startswith('FNDA:'):
+                            i += 1
+                        continue
+                    else:
+                        i += 1
+                        continue
+        output.append(line)
+        i += 1
+
+    with open(outfile, 'w') as f:
+        f.writelines(output)
+
+    print(f"Excluded {removed} unreachable functions from {infile}")
+
+if __name__ == '__main__':
+    main()
diff --git a/tests/test-prj-running.sh b/tests/test-prj-running.sh
index b3fb9872..17ac8bb0 100644
--- a/tests/test-prj-running.sh
+++ b/tests/test-prj-running.sh
@@ -59,6 +59,9 @@ lcov -d "${workdir}" -c -o ./coverage.info
 lcov --extract ./coverage.info '*/reader/*' -o ./coverage.info
 lcov --remove  ./coverage.info '*/tests/*' -o ./coverage.info
 
+# Exclude compiler-generated and unreachable functions (D0Ev, Q_OBJECT tr, env-dependent lambdas)
+python3 "${script_dir}/exclude_unreachable.py" ./coverage.info ./coverage.info
+
 # Generate HTML report
 genhtml -o ./html ./coverage.info