New test support harness primitives for testing stimbuffapis

tests/support/exceptionAssertions.h

@@ -0,0 +1,63 @@
+#ifndef SPINSCALE_TEST_SUPPORT_EXCEPTION_ASSERTIONS_H
+#define SPINSCALE_TEST_SUPPORT_EXCEPTION_ASSERTIONS_H
+
+#include <exception>
+#include <stdexcept>
+#include <string>
+
+#include <gtest/gtest.h>
+
+namespace sscl::tests {
+
+inline void requireExceptionMessageContains(
+	const std::exception &exception,
+	const std::string &expectedSubstring)
+{
+	const std::string message = exception.what();
+	if (message.find(expectedSubstring) == std::string::npos) {
+		throw std::runtime_error(
+			"Expected exception message to contain \""
+			+ expectedSubstring
+			+ "\", got \""
+			+ message
+			+ "\"");
+	}
+}
+
+inline void expectExceptionMessageContains(
+	const std::exception &exception,
+	const std::string &expectedSubstring)
+{
+	EXPECT_NO_THROW(
+		requireExceptionMessageContains(exception, expectedSubstring));
+}
+
+inline void requireExceptionPtrMessageContains(
+	const std::exception_ptr &exceptionPtr,
+	const std::string &expectedSubstring)
+{
+	try {
+		std::rethrow_exception(exceptionPtr);
+	}
+	catch (const std::exception &exception) {
+		requireExceptionMessageContains(exception, expectedSubstring);
+		return;
+	}
+	catch (...) {
+		throw std::runtime_error("Expected std::exception in exception_ptr");
+	}
+}
+
+inline void expectExceptionPtrMessageContains(
+	const std::exception_ptr &exceptionPtr,
+	const std::string &expectedSubstring)
+{
+	EXPECT_NO_THROW(
+		requireExceptionPtrMessageContains(
+			exceptionPtr,
+			expectedSubstring));
+}
+
+} // namespace sscl::tests
+
+#endif // SPINSCALE_TEST_SUPPORT_EXCEPTION_ASSERTIONS_H