[PATCH spice-streaming-agent v3 3/3] 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/.gitignore              |  5 +--
 src/unittests/Makefile.am             | 15 +++++++++
 src/unittests/test-mjpeg-fallback.cpp | 58 +++++++++++++++++++++++++++++++++++
 6 files changed, 85 insertions(+), 2 deletions(-)
 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 1b51ee0..ae1777d 100644
--- a/src/mjpeg-fallback.cpp
+++ b/src/mjpeg-fallback.cpp
@@ -181,6 +181,11 @@ 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 04fa2eb..8496763 100644
--- a/src/mjpeg-fallback.hpp
+++ b/src/mjpeg-fallback.hpp
@@ -25,6 +25,7 @@ public:
     FrameCapture *CreateCapture() override;
     unsigned Rank() override;
     void ParseOptions(const ConfigureOption *options);
+    MjpegSettings Options() const;  // TODO unify on Settings vs Options
     SpiceVideoCodecType VideoCodecType() const;
 private:
     MjpegSettings settings = { 10, 80 };
diff --git a/src/unittests/.gitignore b/src/unittests/.gitignore
index af41c48..22f1335 100644
--- a/src/unittests/.gitignore
+++ b/src/unittests/.gitignore
@@ -1,4 +1,5 @@
 /hexdump
-/test-hexdump.sh.log
-/test-hexdump.sh.trs
+/test-*.log
+/test-*.trs
+/test-mjpeg-fallback
 /test-suite.log
diff --git a/src/unittests/Makefile.am b/src/unittests/Makefile.am
index a70a4b4..bd079c3 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 = \
 	hexdump \
+	test-mjpeg-fallback \
 	$(NULL)
 
 TESTS = \
 	test-hexdump.sh \
+	test-mjpeg-fallback \
 	$(NULL)
 
 noinst_PROGRAMS = \
@@ -32,6 +35,18 @@ hexdump_LDADD = \
 	../libstreaming-utils.a \
 	$(NULL)
 
+test_mjpeg_fallback_SOURCES = \
+	test-mjpeg-fallback.cpp \
+	../jpeg.cpp \
+	../mjpeg-fallback.cpp \
+	../static-plugin.cpp \
+	$(NULL)
+
+test_mjpeg_fallback_LDADD = \
+	$(X11_LIBS) \
+	$(JPEG_LIBS) \
+	$(NULL)
+
 EXTRA_DIST = \
 	test-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..4a152fe
--- /dev/null
+++ b/src/unittests/test-mjpeg-fallback.cpp
@@ -0,0 +1,58 @@
+#define CATCH_CONFIG_MAIN
+#include "catch/catch.hpp"
+
+#include "mjpeg-fallback.hpp"
+
+namespace ssa = spice::streaming_agent;
+
+
+SCENARIO("test parsing mjpeg plugin options", "[mjpeg][options]") {
+    GIVEN("A new mjpeg plugin") {
+        ssa::MjpegPlugin plugin;
+
+        WHEN("passing correct options") {
+            std::vector<ssa::ConfigureOption> options = {
+                {"framerate", "20"},
+                {"mjpeg.quality", "90"},
+                {NULL, NULL}
+            };
+
+            plugin.ParseOptions(options.data());
+            ssa::MjpegSettings new_options = plugin.Options();
+
+            THEN("the options are set in the plugin") {
+                CHECK(new_options.fps == 20);
+                CHECK(new_options.quality == 90);
+            }
+        }
+
+        WHEN("passing an unknown option") {
+            std::vector<ssa::ConfigureOption> options = {
+                {"wakaka", "10"},
+                {NULL, NULL}
+            };
+
+            THEN("ParseOptions throws an exception") {
+                REQUIRE_THROWS_WITH(
+                    plugin.ParseOptions(options.data()),
+                    "Invalid option 'wakaka'."
+                );
+            }
+        }
+
+        WHEN("passing an invalid option value") {
+            std::vector<ssa::ConfigureOption> options = {
+                {"framerate", "40"},
+                {"mjpeg.quality", "toot"},
+                {NULL, NULL}
+            };
+
+            THEN("ParseOptions throws an exception") {
+                REQUIRE_THROWS_WITH(
+                    plugin.ParseOptions(options.data()),
+                    "Invalid value 'toot' for option 'mjpeg.quality'."
+                );
+            }
+        }
+    }
+}
-- 
2.16.1

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