tests: add unit tests for TransferFunction helpers (#13889)

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/helpers/TransferFunction.cpp b/tests/helpers/TransferFunction.cpp
new file mode 100644
index 00000000..8d5c21e3
--- /dev/null
+++ b/tests/helpers/TransferFunction.cpp
@@ -0,0 +1,43 @@
+#include <helpers/TransferFunction.hpp>
+
+#include <gtest/gtest.h>
+
+using namespace NTransferFunction;
+
+TEST(Helpers, transferFunctionFromStringNamed) {
+    EXPECT_EQ(fromString("default"), TF_DEFAULT);
+    EXPECT_EQ(fromString("auto"), TF_AUTO);
+    EXPECT_EQ(fromString("srgb"), TF_SRGB);
+    EXPECT_EQ(fromString("gamma22"), TF_GAMMA22);
+    EXPECT_EQ(fromString("gamma22force"), TF_FORCED_GAMMA22);
+}
+
+TEST(Helpers, transferFunctionFromStringNumeric) {
+    EXPECT_EQ(fromString("0"), TF_DEFAULT);
+    EXPECT_EQ(fromString("1"), TF_GAMMA22);
+    EXPECT_EQ(fromString("2"), TF_FORCED_GAMMA22);
+    EXPECT_EQ(fromString("3"), TF_SRGB);
+}
+
+TEST(Helpers, transferFunctionFromStringInvalid) {
+    EXPECT_EQ(fromString(""), TF_DEFAULT);
+    EXPECT_EQ(fromString("invalid"), TF_DEFAULT);
+    EXPECT_EQ(fromString("SRGB"), TF_DEFAULT);
+    EXPECT_EQ(fromString("Gamma22"), TF_DEFAULT);
+}
+
+TEST(Helpers, transferFunctionToString) {
+    EXPECT_FALSE(toString(TF_DEFAULT).empty());
+    EXPECT_FALSE(toString(TF_AUTO).empty());
+    EXPECT_FALSE(toString(TF_SRGB).empty());
+    EXPECT_FALSE(toString(TF_GAMMA22).empty());
+    EXPECT_FALSE(toString(TF_FORCED_GAMMA22).empty());
+}
+
+TEST(Helpers, transferFunctionRoundTrip) {
+    EXPECT_EQ(fromString(toString(TF_DEFAULT)), TF_DEFAULT);
+    EXPECT_EQ(fromString(toString(TF_AUTO)), TF_AUTO);
+    EXPECT_EQ(fromString(toString(TF_SRGB)), TF_SRGB);
+    EXPECT_EQ(fromString(toString(TF_GAMMA22)), TF_GAMMA22);
+    EXPECT_EQ(fromString(toString(TF_FORCED_GAMMA22)), TF_FORCED_GAMMA22);
+}