test: Add context test

2 files changed, 148 insertions, 0 deletions

diff --git a/test/Makefile.am b/test/Makefile.am
index ac0f419..fcbd305 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -7,6 +7,7 @@ CLEANFILES = file.c img_save-*.*
  GTEST_LIBS = -lgtest -lstdc++
 
  GTESTS  = test_file
+ GTESTS += test_context
  GTESTS += test_load
  GTESTS += test_load_2
  GTESTS += test_save
@@ -35,6 +36,9 @@ test_file_SOURCES = test_file.cpp
 nodist_test_file_SOURCES = file.c
 test_file_LDADD = $(LIBS)
 
+test_context_SOURCES = test_context.cpp
+test_context_LDADD = $(LIBS)
+
 test_load_SOURCES = test_load.cpp
 test_load_LDADD = $(LIBS)
 
diff --git a/test/test_context.cpp b/test/test_context.cpp
new file mode 100644
index 0000000..d89a90b
--- /dev/null
+++ b/test/test_context.cpp
@@ -0,0 +1,144 @@
+#include <gtest/gtest.h>
+
+#include <stddef.h>
+#include <Imlib2.h>
+
+#define NULC ((Imlib_Context*)0)
+
+#define HAVE_INITIAL_CTX 0
+
+int                 debug = 0;
+
+#define D(...)  if (debug) printf(__VA_ARGS__)
+#define D2(...) if (debug > 1) printf(__VA_ARGS__)
+#if 0
+EAPI Imlib_Context  imlib_context_new(void);
+EAPI void           imlib_context_free(Imlib_Context context);
+
+EAPI void           imlib_context_push(Imlib_Context context);
+EAPI void           imlib_context_pop(void);
+EAPI Imlib_Context  imlib_context_get(void);
+#endif
+
+TEST(CTX, ctx)
+{
+   Imlib_Context       ctx, ctx0, ctx1;
+
+   // Part 1
+
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+#if !HAVE_INITIAL_CTX
+   EXPECT_EQ(ctx, NULC);
+
+   // Delete NULL should just complain
+   imlib_context_free(ctx);
+#else
+   EXPECT_TRUE(ctx);
+
+   // Delete initial should just be ignored
+   imlib_context_free(ctx);
+#endif
+
+   // Part 2
+
+#if !HAVE_INITIAL_CTX
+   ctx0 = imlib_context_new();  // Create initial context
+   D("%d: ctx0 = %p\n", __LINE__, ctx0);
+   EXPECT_TRUE(ctx0);
+   // * NB! After first call to imlib_context_push() we cannot ged rid of
+   //       the first context
+   imlib_context_push(ctx0);
+
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx is initial
+#else
+   ctx0 = imlib_context_get();
+   D("%d: ctx0 = %p\n", __LINE__, ctx0);
+   EXPECT_TRUE(ctx0);
+#endif
+
+   // Attempt to pop first (should not succeed)
+   imlib_context_pop();
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx is still initial
+
+   // Attempt to free first (should not succeed)
+   imlib_context_free(ctx);
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx is still initial
+
+   // Part 3
+
+   ctx1 = imlib_context_new();
+   D("%d: ctx1 = %p\n", __LINE__, ctx1);
+   EXPECT_TRUE(ctx1);
+   EXPECT_NE(ctx0, ctx1);
+
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx still default
+
+   imlib_context_push(ctx1);
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx1);        // Ctx now new
+
+   // Attempt to free new current (should not succeed)
+   imlib_context_free(ctx1);
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx1);        // Ctx still new
+
+   imlib_context_pop();
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx now default
+
+#if 0
+   // No! - The previous delete set ->dirty which will have caused
+   //       imlib_context_pop() above to free it.
+   // Free new context, now unused
+   imlib_context_free(ctx1);
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx still default
+#endif
+
+   imlib_context_pop();
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx still default
+
+   // Free initial context (should not succeed)
+   imlib_context_free(ctx0);
+   ctx = imlib_context_get();
+   D("%d: ctx  = %p\n", __LINE__, ctx);
+   EXPECT_EQ(ctx, ctx0);        // Ctx still default
+}
+
+int
+main(int argc, char **argv)
+{
+   const char         *s;
+
+   ::testing::InitGoogleTest(&argc, argv);
+
+   for (argc--, argv++; argc > 0; argc--, argv++)
+     {
+        s = argv[0];
+        if (*s++ != '-')
+           break;
+        switch (*s)
+          {
+          case 'd':
+             debug++;
+             break;
+          }
+     }
+
+   return RUN_ALL_TESTS();
+}