chore(region): simplify region tests with fixture and matcher

test/RegionTest.hpp

@@ -0,0 +1,50 @@
+#include "storm/Region.hpp"
+#include "test/Test.hpp"
+#include <sstream>
+
+// Fixture for repetitive handling of Rgn objects.
+struct RgnDataTest {
+    HSRGN rgn = nullptr;
+
+    RgnDataTest() {
+      SRgnCreate(&rgn, 0);
+    }
+
+    ~RgnDataTest() {
+      SRgnDelete(rgn);
+      rgn = nullptr;
+    }
+
+    HSRGN* operator &() { return &rgn; }
+    operator HSRGN() const { return rgn; }
+    HSRGN operator->() const { return rgn; }
+};
+
+// Helpers for comparing RECTF structs
+std::ostream& operator <<(std::ostream& os, RECTF const& value) {
+    os << "{ " << value.left << ", " << value.bottom << ", " << value.right << ", " << value.top << " }";
+    return os;
+}
+
+template <class T>
+class RECTMatcher : public Catch::MatcherBase<T> {
+private:
+  T cmp;
+
+public:
+  RECTMatcher(T arg) : cmp(arg) {}
+
+  bool match(T const& in) const override {
+    return cmp.left == in.left && cmp.bottom == in.bottom && cmp.right == in.right && cmp.top == in.top;
+  }
+
+  std::string describe() const override {
+    std::ostringstream ss;
+    ss << "equals " << cmp;
+    return ss.str();
+  }
+};
+
+RECTMatcher<RECTF> MatchesRect(RECTF arg) {
+  return { arg };
+}