[PATCH spice-streaming-agent 2/4] mjpeg-fallback: unittest for the options parsing

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Introduce a unit test framework (Catch) to the codebase and a simple
unit test for parsing the options of the mjpeg plugin.

Signed-off-by: Lukáš Hrázký <lhrazky@xxxxxxxxxx>
---
 configure.ac                          |  3 +++
 src/mjpeg-fallback.cpp                |  5 ++++
 src/mjpeg-fallback.hpp                |  1 +
 src/unittests/Makefile.am             | 12 +++++++++
 src/unittests/test-mjpeg-fallback.cpp | 50 +++++++++++++++++++++++++++++++++++
 5 files changed, 71 insertions(+)
 create mode 100644 src/unittests/test-mjpeg-fallback.cpp

diff --git a/configure.ac b/configure.ac
index 8795dae..5aab662 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,7 @@ if test x"$ac_cv_prog_cc_c99" = xno; then
     AC_MSG_ERROR([C99 compiler is required.])
 fi
 AC_PROG_CXX
+AC_LANG(C++)
 AX_CXX_COMPILE_STDCXX_11
 AC_PROG_INSTALL
 AC_CANONICAL_HOST
@@ -49,6 +50,8 @@ AC_CHECK_LIB(jpeg, jpeg_destroy_decompress,
     AC_MSG_ERROR([libjpeg not found]))
 AC_SUBST(JPEG_LIBS)
 
+AC_CHECK_HEADER([catch/catch.hpp],,[AC_MSG_ERROR([Could not find Catch dependency header (catch/catch.hpp)])])
+
 dnl ===========================================================================
 dnl check compiler flags
 
diff --git a/src/mjpeg-fallback.cpp b/src/mjpeg-fallback.cpp
index 7aaa355..d6dcf74 100644
--- a/src/mjpeg-fallback.cpp
+++ b/src/mjpeg-fallback.cpp
@@ -186,6 +186,11 @@ void MjpegPlugin::ParseOptions(const ConfigureOption *options)
     }
 }
 
+MjpegSettings MjpegPlugin::Options() const
+{
+    return settings;
+}
+
 SpiceVideoCodecType MjpegPlugin::VideoCodecType() const {
     return SPICE_VIDEO_CODEC_TYPE_MJPEG;
 }
diff --git a/src/mjpeg-fallback.hpp b/src/mjpeg-fallback.hpp
index 0e9ed6a..65c5fd3 100644
--- a/src/mjpeg-fallback.hpp
+++ b/src/mjpeg-fallback.hpp
@@ -24,6 +24,7 @@ public:
     FrameCapture *CreateCapture() override;
     unsigned Rank() override;
     void ParseOptions(const ConfigureOption *options);
+    MjpegSettings Options() const;  // TODO unify on Settings vs Options
     SpiceVideoCodecType VideoCodecType() const;
     static bool Register(Agent* agent);
 private:
diff --git a/src/unittests/Makefile.am b/src/unittests/Makefile.am
index ef6c253..be25a0e 100644
--- a/src/unittests/Makefile.am
+++ b/src/unittests/Makefile.am
@@ -2,6 +2,7 @@ NULL =
 
 AM_CPPFLAGS = \
 	-DRH_TOP_SRCDIR=\"$(abs_top_srcdir)\" \
+	-I$(top_srcdir)/include \
 	-I$(top_srcdir)/src \
 	-I$(top_srcdir)/src/unittests \
 	$(SPICE_PROTOCOL_CFLAGS) \
@@ -14,10 +15,12 @@ AM_CFLAGS = \
 
 check_PROGRAMS = \
 	test-hexdump \
+	test-mjpeg-fallback \
 	$(NULL)
 
 TESTS = \
 	hexdump.sh \
+	test-mjpeg-fallback \
 	$(NULL)
 
 noinst_PROGRAMS = \
@@ -32,6 +35,15 @@ test_hexdump_LDADD = \
 	../libstreaming-utils.a \
 	$(NULL)
 
+test_mjpeg_fallback_SOURCES = \
+	test-mjpeg-fallback.cpp \
+	../mjpeg-fallback.cpp \
+	../jpeg.cpp
+
+test_mjpeg_fallback_LDADD = \
+	$(X11_LIBS) \
+	$(JPEG_LIBS)
+
 EXTRA_DIST = \
 	hexdump.sh \
 	hexdump1.in \
diff --git a/src/unittests/test-mjpeg-fallback.cpp b/src/unittests/test-mjpeg-fallback.cpp
new file mode 100644
index 0000000..08ed406
--- /dev/null
+++ b/src/unittests/test-mjpeg-fallback.cpp
@@ -0,0 +1,50 @@
+#define CATCH_CONFIG_MAIN
+#include "catch/catch.hpp"
+
+#include "mjpeg-fallback.hpp"
+
+namespace ssa = SpiceStreamingAgent;
+
+
+TEST_CASE("test parse options", "[mjpeg][options]")
+{
+    ssa::MjpegPlugin plugin;
+
+    SECTION("correct setup") {
+        std::vector<ssa::ConfigureOption> options = {
+            {"framerate", "20"},
+            {"mjpeg.quality", "90"},
+            {NULL, NULL}
+        };
+
+        plugin.ParseOptions(options.data());
+        ssa::MjpegSettings new_options = plugin.Options();
+        CHECK(new_options.fps == 20);
+        CHECK(new_options.quality == 90);
+    }
+
+    SECTION("unknown option") {
+        std::vector<ssa::ConfigureOption> options = {
+            {"wakaka", "10"},
+            {NULL, NULL}
+        };
+
+        REQUIRE_THROWS_WITH(
+            plugin.ParseOptions(options.data()),
+            "Invalid option 'wakaka'."
+        );
+    }
+
+    SECTION("invalid option value") {
+        std::vector<ssa::ConfigureOption> options = {
+            {"framerate", "10"},
+            {"mjpeg.quality", "toot"},
+            {NULL, NULL}
+        };
+
+        REQUIRE_THROWS_WITH(
+            plugin.ParseOptions(options.data()),
+            "Invalid value 'toot' for option 'mjpeg.quality'."
+        );
+    }
+}
-- 
2.16.1

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