Fix #1906, Enforce minimum code coverage

.github/workflows/code-coverage.yml

@@ -94,4 +94,21 @@ jobs:
         run: |
           lcov --capture --rc lcov_branch_coverage=1 --directory build --output-file coverage_test.info
           lcov --rc lcov_branch_coverage=1 --add-tracefile coverage_base.info --add-tracefile coverage_test.info --output-file coverage_total.info
-          genhtml coverage_total.info --branch-coverage --output-directory lcov
+          genhtml coverage_total.info --branch-coverage --output-directory lcov | tee lcov_out.txt
+
+      - name: Confirm Minimum Coverage
+        run: |
+          missed_branches=76
+          missed_lines=33
+          branch_nums=$(grep -A 3 "Overall coverage rate" lcov_out.txt | grep branches | grep -oP "[0-9]+[0-9]*")
+          line_nums=$(grep -A 3 "Overall coverage rate" lcov_out.txt | grep lines | grep -oP "[0-9]+[0-9]*")
+
+          branch_diff=$(echo $branch_nums | awk '{ print $4 - $3 }')
+          line_diff=$(echo $line_nums | awk '{ print $4 - $3 }')
+          if [ $branch_diff -gt $missed_branches ] || [ $line_diff -gt $missed_lines ]
+          then
+            grep -A 3 "Overall coverage rate" lcov_out.txt
+            echo "$branch_diff branches missed, $missed_branches allowed"
+            echo "$line_diff lines missed, $missed_lines allowed"
+            exit -1
+          fi