Improve unit test coverage

Author: vincentlaucsb

.github/workflows/coverage.yml

@@ -45,13 +45,16 @@ jobs:
     - name: Capture coverage data
       run: |
         lcov --capture \
-          --directory build/include \
+          --directory build \
           --output-file coverage.info \
           --ignore-errors mismatch
-        # Strip system headers and external deps
+        # Strip system headers, external deps, Catch2, and test files
         lcov --remove coverage.info \
           '/usr/*' \
           '*/external/*' \
+          '*/catch2/*' \
+          '*/Catch2/*' \
+          '*/tests/*' \
           --output-file coverage.info
         lcov --list coverage.info
 

tests/test_csv_field.cpp

@@ -148,6 +148,10 @@ TEST_CASE("CSVField get<>() - Floating Point Value", "[test_csv_field_get_float]
         REQUIRE(euler.try_get(double_out));
         REQUIRE(double_out == Catch::Approx(2.718));
 
+        double long_double_out = 0;
+        REQUIRE(euler.try_get(long_double_out));
+        REQUIRE(double_out == Catch::Approx(2.718l));
+
         int int_out = 0;
         REQUIRE_FALSE(euler.try_get(int_out));
     }