Auto discover coverage paths from test file names

CHANGELOG.md

@@ -4,6 +4,12 @@
 
 ### Added
 - Better code coverage HTML report
+- Auto-discover coverage paths from test file names when `BASHUNIT_COVERAGE_PATHS` is not set
+    - `tests/unit/assert_test.sh` automatically tracks `src/assert.sh`
+    - Removes need for manual `--coverage-paths` configuration in most cases
+
+### Fixed
+- Coverage now excludes control flow keywords (`then`, `else`, `fi`, `do`, `done`, `esac`, `;;`, case patterns) from line tracking
 
 ## [0.31.0](https://github.com/TypedDevs/bashunit/compare/0.30.0...0.31.0) - 2025-12-19
 

docs/command-line.md

@@ -67,7 +67,7 @@ bashunit test tests/ --parallel --simple
 | `-l, --login`                  | Run tests in login shell context                 |
 | `--no-color`                   | Disable colored output                           |
 | `--coverage`                   | Enable code coverage tracking                    |
-| `--coverage-paths <paths>`     | Paths to track (default: `src/`)                 |
+| `--coverage-paths <paths>`     | Paths to track (default: auto-discover)          |
 | `--coverage-exclude <pat>`     | Exclusion patterns                               |
 | `--coverage-report <file>`     | LCOV output path (default: `coverage/lcov.info`) |
 | `--coverage-report-html <dir>` | Generate HTML report with line highlighting      |
@@ -311,7 +311,7 @@ bashunit test tests/ --coverage --coverage-paths src/,lib/ --coverage-min 80
 | Option                          | Description                                                                 |
 |---------------------------------|-----------------------------------------------------------------------------|
 | `--coverage`                    | Enable coverage tracking                                                    |
-| `--coverage-paths <paths>`      | Comma-separated paths to track (default: `src/`)                            |
+| `--coverage-paths <paths>`      | Comma-separated paths to track (default: auto-discover from test files)     |
 | `--coverage-exclude <patterns>` | Comma-separated patterns to exclude (default: `tests/*,vendor/*,*_test.sh`) |
 | `--coverage-report <file>`      | LCOV output file path (default: `coverage/lcov.info`)                       |
 | `--coverage-report-html <dir>`  | Generate HTML coverage report with line-by-line highlighting                |

docs/configuration.md

@@ -450,14 +450,16 @@ BASHUNIT_COVERAGE=true
 
 > `BASHUNIT_COVERAGE_PATHS=paths`
 
-Comma-separated list of paths to track for coverage. `src/` by default.
+Comma-separated list of paths to track for coverage.
+
+By default, paths are auto-discovered from test file names (e.g., `tests/unit/assert_test.sh` discovers `src/assert.sh`).
 
 ::: code-group
 ```bash [.env]
-# Single path
+# Single path (explicit)
 BASHUNIT_COVERAGE_PATHS=src/
 
-# Multiple paths
+# Multiple paths (explicit)
 BASHUNIT_COVERAGE_PATHS=src/,lib/,bin/
 ```
 :::

docs/coverage.md

@@ -54,7 +54,7 @@ The DEBUG trap adds overhead to test execution. For large test suites, consider
 | Option | Description |
 |--------|-------------|
 | `--coverage` | Enable code coverage tracking |
-| `--coverage-paths <paths>` | Comma-separated paths to track (default: `src/`) |
+| `--coverage-paths <paths>` | Comma-separated paths to track (default: auto-discover from test files) |
 | `--coverage-exclude <patterns>` | Comma-separated exclusion patterns |
 | `--coverage-report <file>` | LCOV report output path (default: `coverage/lcov.info`) |
 | `--coverage-report-html <dir>` | Generate HTML coverage report with line-by-line details |
@@ -65,6 +65,21 @@ The DEBUG trap adds overhead to test execution. For large test suites, consider
 Coverage is automatically enabled when using `--coverage-report`, `--coverage-report-html`, or `--coverage-min`. You don't need to specify `--coverage` explicitly with these options.
 :::
 
+### Auto-Discovery
+
+When `BASHUNIT_COVERAGE_PATHS` is not set, bashunit automatically discovers source files based on your test file names:
+
+| Test File | Discovers |
+|-----------|-----------|
+| `tests/unit/assert_test.sh` | `src/assert.sh`, `src/assert_*.sh` |
+| `tests/unit/helperTest.sh` | `src/helper.sh`, `src/helper*.sh` |
+
+This convention follows the common pattern of naming test files after their source files with a `_test.sh` or `Test.sh` suffix.
+
+::: tip Zero Configuration
+For most projects following standard naming conventions, you can simply run `bashunit tests/ --coverage` without any path configuration.
+:::
+
 ### Environment Variables
 
 You can also configure coverage via environment variables in your `.env` file:
@@ -329,6 +344,8 @@ These lines are not counted toward coverage:
 - Comment lines (including shebang `#!/usr/bin/env bash`)
 - Function declaration lines (`function foo() {`)
 - Lines with only braces (`{` or `}`)
+- Control flow keywords (`then`, `else`, `fi`, `do`, `done`, `esac`, `in`)
+- Case statement patterns (`--option)`, `*)`) and terminators (`;;`, `;&`, `;;&`)
 
 ## Limitations
 

src/coverage.sh

@@ -13,10 +13,40 @@ _BASHUNIT_COVERAGE_TRACKED_CACHE_FILE="${_BASHUNIT_COVERAGE_TRACKED_CACHE_FILE:-
 # File to store which tests hit each line (for detailed coverage tooltips)
 _BASHUNIT_COVERAGE_TEST_HITS_FILE="${_BASHUNIT_COVERAGE_TEST_HITS_FILE:-}"
 
-# Store the subshell level when coverage trap is enabled
-# Used to skip recording in nested subshells (command substitution)
-# Uses $BASH_SUBSHELL which is Bash 3.2 compatible (unlike $BASHPID)
-_BASHUNIT_COVERAGE_SUBSHELL_LEVEL="${_BASHUNIT_COVERAGE_SUBSHELL_LEVEL:-}"
+# Auto-discover coverage paths from test file names
+# When no explicit coverage paths are set, find source files matching test file base names
+# Example: tests/unit/assert_test.sh -> finds src/assert.sh, src/assert_*.sh
+function bashunit::coverage::auto_discover_paths() {
+  local project_root
+  project_root="$(pwd)"
+  local -a discovered_paths=()
+
+  for test_file in "$@"; do
+    # Extract base name: tests/unit/assert_test.sh -> assert_test.sh
+    local file_basename
+    file_basename=$(basename "$test_file")
+
+    # Remove test suffixes to get source name: assert_test.sh -> assert
+    local source_name="${file_basename%_test.sh}"
+    [[ "$source_name" == "$file_basename" ]] && source_name="${file_basename%Test.sh}"
+    [[ "$source_name" == "$file_basename" ]] && continue  # Not a test file pattern
+
+    # Find matching source files recursively
+    while IFS= read -r -d '' found_file; do
+      # Skip test files and vendor directories
+      [[ "$found_file" == *test* ]] && continue
+      [[ "$found_file" == *Test* ]] && continue
+      [[ "$found_file" == *vendor* ]] && continue
+      [[ "$found_file" == *node_modules* ]] && continue
+      discovered_paths+=("$found_file")
+    done < <(find "$project_root" -name "${source_name}*.sh" -type f -print0 2>/dev/null)
+  done
+
+  # Return unique paths, comma-separated
+  if [[ ${#discovered_paths[@]} -gt 0 ]]; then
+    printf '%s\n' "${discovered_paths[@]}" | sort -u | tr '\n' ',' | sed 's/,$//'
+  fi
+}
 
 function bashunit::coverage::init() {
   if ! bashunit::env::is_coverage_enabled; then
@@ -58,11 +88,6 @@ function bashunit::coverage::enable_trap() {
     return 0
   fi
 
-  # Store the subshell level for nested subshell detection
-  # $BASH_SUBSHELL increments in each nested subshell (Bash 3.2 compatible)
-  _BASHUNIT_COVERAGE_SUBSHELL_LEVEL="$BASH_SUBSHELL"
-  export _BASHUNIT_COVERAGE_SUBSHELL_LEVEL
-
   # Enable trap inheritance into functions
   set -T
 
@@ -99,11 +124,6 @@ function bashunit::coverage::record_line() {
   # Skip if coverage data file doesn't exist (trap inherited by child process)
   [[ -z "$_BASHUNIT_COVERAGE_DATA_FILE" ]] && return 0
 
-  # Skip recording in nested subshells (command substitution like $(...))
-  # $BASH_SUBSHELL increments in each nested subshell
-  # This prevents interference with tests that capture output
-  [[ -n "$_BASHUNIT_COVERAGE_SUBSHELL_LEVEL" && "$BASH_SUBSHELL" -gt "$_BASHUNIT_COVERAGE_SUBSHELL_LEVEL" ]] && return 0
-
   # Skip if not tracking this file (uses cache internally)
   bashunit::coverage::should_track "$file" || return 0
 
@@ -299,6 +319,15 @@ function bashunit::coverage::is_executable_line() {
   # Skip lines with only braces
   [[ "$line" =~ ^[[:space:]]*[\{\}][[:space:]]*$ ]] && return 1
 
+  # Skip control flow keywords (then, else, fi, do, done, esac, in, ;;, ;&, ;;&)
+  [[ "$line" =~ ^[[:space:]]*(then|else|fi|do|done|esac|in|;;|;;&|;&)[[:space:]]*(#.*)?$ ]] && return 1
+
+  # Skip case patterns like "--option)" or "*)"
+  [[ "$line" =~ ^[[:space:]]*[^\)]+\)[[:space:]]*$ ]] && return 1
+
+  # Skip standalone ) for arrays/subshells
+  [[ "$line" =~ ^[[:space:]]*\)[[:space:]]*(#.*)?$ ]] && return 1
+
   return 0
 }
 
@@ -775,7 +804,7 @@ function bashunit::coverage::report_html() {
   # Generate index.html
   bashunit::coverage::generate_index_html \
     "$output_dir/index.html" "$total_hit" "$total_executable" "$total_pct" \
-    "$tests_total" "$tests_passed" "$tests_failed" "${file_data[@]}"
+    "$tests_total" "$tests_passed" "$tests_failed" ${file_data[@]+"${file_data[@]}"}
 
   echo "Coverage HTML report written to: $output_dir/index.html"
 }
@@ -789,11 +818,13 @@ function bashunit::coverage::generate_index_html() {
   local tests_passed="$6"
   local tests_failed="$7"
   shift 7
-  local file_data=("$@")
+  local file_data=()
+  [[ $# -gt 0 ]] && file_data=("$@")
 
   # Calculate uncovered lines and file count
   local total_uncovered=$((total_executable - total_hit))
-  local file_count=${#file_data[@]}
+  local file_count=0
+  [[ ${#file_data[@]} -gt 0 ]] && file_count=${#file_data[@]}
 
   # Calculate gauge stroke offset (440 is full circle circumference)
   local gauge_offset=$((440 - (440 * total_pct / 100)))
@@ -1082,7 +1113,7 @@ EOF
           <tbody>
 EOF
 
-    for data in "${file_data[@]}"; do
+    for data in ${file_data[@]+"${file_data[@]}"}; do
       IFS='|' read -r display_file hit executable pct safe_filename <<< "$data"
 
       local class="low"

src/env.sh

@@ -18,7 +18,7 @@ _BASHUNIT_DEFAULT_REPORT_HTML=""
 
 # Coverage defaults (following kcov, bashcov, SimpleCov conventions)
 _BASHUNIT_DEFAULT_COVERAGE="false"
-_BASHUNIT_DEFAULT_COVERAGE_PATHS="src/"
+_BASHUNIT_DEFAULT_COVERAGE_PATHS=""
 _BASHUNIT_DEFAULT_COVERAGE_EXCLUDE="tests/*,vendor/*,*_test.sh,*Test.sh"
 _BASHUNIT_DEFAULT_COVERAGE_REPORT="coverage/lcov.info"
 _BASHUNIT_DEFAULT_COVERAGE_REPORT_HTML=""

src/runner.sh

@@ -20,6 +20,10 @@ function bashunit::runner::load_test_files() {
 
   # Initialize coverage tracking if enabled
   if bashunit::env::is_coverage_enabled; then
+    # Auto-discover coverage paths if not explicitly set
+    if [[ -z "$BASHUNIT_COVERAGE_PATHS" ]]; then
+      BASHUNIT_COVERAGE_PATHS=$(bashunit::coverage::auto_discover_paths "${files[@]}")
+    fi
     bashunit::coverage::init
   fi
 

tests/unit/coverage_test.sh

@@ -220,8 +220,8 @@ function test_coverage_cleanup_removes_temp_files() {
   assert_directory_not_exists "$coverage_dir"
 }
 
-function test_coverage_default_paths_is_src() {
-  assert_equals "src/" "$_BASHUNIT_DEFAULT_COVERAGE_PATHS"
+function test_coverage_default_paths_is_empty_for_auto_discovery() {
+  assert_equals "" "$_BASHUNIT_DEFAULT_COVERAGE_PATHS"
 }
 
 function test_coverage_default_report_is_lcov() {
@@ -273,6 +273,84 @@ function test_coverage_is_executable_line_returns_false_for_brace_only() {
   assert_equals "no" "$result"
 }
 
+function test_coverage_is_executable_line_returns_false_for_then() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  then' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_else() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  else' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_fi() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  fi' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_do() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  do' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_done() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  done' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_esac() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  esac' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_case_terminator() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '      ;;' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_case_pattern() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '    --exit)' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_wildcard_case() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '    *)' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_case_fallthrough() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '      ;&' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_case_continue() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '      ;;&' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_in_keyword() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  in' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
+function test_coverage_is_executable_line_returns_false_for_standalone_paren() {
+  local result
+  result=$(bashunit::coverage::is_executable_line '  )' 2 && echo "yes" || echo "no")
+  assert_equals "no" "$result"
+}
+
 function test_coverage_check_threshold_fails_when_below_minimum() {
   BASHUNIT_COVERAGE="true"
   BASHUNIT_COVERAGE_MIN="80"