test: span: Add tests for begin() and rbegin()

Verify that the begin() and rbegin() iterators (and their const version)
reference the correct values. The end() and rend() iterators can't be
tested the same way as they're not dereferenceable.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 32 insertions, 8 deletions

diff --git a/test/span.cpp b/test/span.cpp
index d60b769c..ca037c8f 100644
--- a/test/span.cpp
+++ b/test/span.cpp
@@ -72,12 +72,24 @@ protected:
 
 		staticSpan = Span<int, 4>{ v };
 
-		staticSpan.begin();
-		staticSpan.cbegin();
+		if (*staticSpan.begin() != 1) {
+			std::cout << "Span<static_extent>::begin() failed" << std::endl;
+			return TestFail;
+		}
+		if (*staticSpan.cbegin() != 1) {
+			std::cout << "Span<static_extent>::cbegin() failed" << std::endl;
+			return TestFail;
+		}
 		staticSpan.end();
 		staticSpan.cend();
-		staticSpan.rbegin();
-		staticSpan.crbegin();
+		if (*staticSpan.rbegin() != 4) {
+			std::cout << "Span<static_extent>::rbegin() failed" << std::endl;
+			return TestFail;
+		}
+		if (*staticSpan.crbegin() != 4) {
+			std::cout << "Span<static_extent>::crbegin() failed" << std::endl;
+			return TestFail;
+		}
 		staticSpan.rend();
 		staticSpan.crend();
 
@@ -141,12 +153,24 @@ protected:
 
 		dynamicSpan = Span<int>{ a };
 
-		dynamicSpan.begin();
-		dynamicSpan.cbegin();
+		if (*dynamicSpan.begin() != 1) {
+			std::cout << "Span<dynamic_extent>::begin() failed" << std::endl;
+			return TestFail;
+		}
+		if (*dynamicSpan.cbegin() != 1) {
+			std::cout << "Span<dynamic_extent>::cbegin() failed" << std::endl;
+			return TestFail;
+		}
 		dynamicSpan.end();
 		dynamicSpan.cend();
-		dynamicSpan.rbegin();
-		dynamicSpan.crbegin();
+		if (*dynamicSpan.rbegin() != 4) {
+			std::cout << "Span<dynamic_extent>::rbegin() failed" << std::endl;
+			return TestFail;
+		}
+		if (*dynamicSpan.crbegin() != 4) {
+			std::cout << "Span<dynamic_extent>::crbegin() failed" << std::endl;
+			return TestFail;
+		}
 		dynamicSpan.rend();
 		dynamicSpan.crend();