From 38be5383420544877958ab34e7eff16f23333ebd Mon Sep 17 00:00:00 2001
From: Recep Aslantas <info@recp.me>
Date: Tue, 25 Apr 2017 23:27:15 +0300
Subject: [PATCH] test: test mat4_mul

---
 makefile.am            | 16 +++++++++
 test/src/test_common.h | 40 ++++++++++++++++++++++
 test/src/test_mat4.c   | 77 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 133 insertions(+)
 create mode 100644 test/src/test_common.h
 create mode 100644 test/src/test_mat4.c

diff --git a/makefile.am b/makefile.am
index eac1d25..7db19d9 100644
--- a/makefile.am
+++ b/makefile.am
@@ -18,6 +18,20 @@ AM_CFLAGS = -Wall \
 lib_LTLIBRARIES = libcglm.la
 libcglm_la_LDFLAGS = -no-undefined -version-info 0:1:0
 
+checkLDFLAGS = -L./.libs \
+               -L./test/lib/cmocka/build/src \
+               -lcmocka \
+               -lm \
+               -lcglm
+checkCFLAGS = -I./test/lib/cmocka/include \
+              -I./include
+
+check_PROGRAMS = test/test_mat4
+TESTS = $(check_PROGRAMS)
+
+test_test_mat4_LDFLAGS = $(checkLDFLAGS)
+test_test_mat4_CFLAGS  = $(checkCFLAGS)
+
 nobase_include_HEADERS = include/cglm.h \
                          include/cglm-call.h \
                          include/cglm-cam.h \
@@ -57,3 +71,5 @@ libcglm_la_SOURCES=\
     src/cglm-vec.c \
     src/cglm-mat3.c \
     src/cglm-mat.c
+
+test_test_mat4_SOURCES=test/src/test_mat4.c
diff --git a/test/src/test_common.h b/test/src/test_common.h
new file mode 100644
index 0000000..71e5962
--- /dev/null
+++ b/test/src/test_common.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+#ifndef test_common_h
+#define test_common_h
+
+#include <stdarg.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+#include <time.h>
+
+#include <cglm.h>
+#include <cglm-call.h>
+
+#define precision 0.00001f
+
+static
+void
+test_rand_mat4(mat4 dest);
+
+static
+void
+test_rand_mat4(mat4 dest) {
+  int i, j;
+
+  srand((unsigned int)time(NULL));
+  for (i = 0; i < 4; i++) {
+    for (j = 0; j < 4; j++) {
+      dest[i][j] = drand48();
+    }
+  }
+}
+
+#endif /* test_common_h */
diff --git a/test/src/test_mat4.c b/test/src/test_mat4.c
new file mode 100644
index 0000000..e6a7947
--- /dev/null
+++ b/test/src/test_mat4.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+#include <time.h>
+#include <stdlib.h>
+#include <math.h>
+#include <float.h>
+
+#include "test_common.h"
+
+#define m 4
+#define n 4
+
+void
+test_mat4_mul(void **state) {
+  mat4  m1 = GLM_MAT4_IDENTITY_INIT;
+  mat4  m2 = GLM_MAT4_IDENTITY_INIT;
+  mat4  m3;
+  mat4  m4 = GLM_MAT4_ZERO_INIT;
+  int   i, j, k;
+
+  /* test identity matrix multiplication */
+  glm_mat4_mul(m1, m2, m3);
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      if (i == j)
+        assert_true(m3[i][j] == 1.0f);
+      else
+        assert_true(m3[i][j] == 0.0f);
+    }
+  }
+
+  /* test random matrices */
+  /* random matrices */
+  test_rand_mat4(m1);
+  test_rand_mat4(m2);
+
+  glm_mat4_mul(m1, m2, m3);
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      for (k = 0; k < m; k++)
+        /* column-major */
+        m4[i][j] += m1[k][j] * m2[i][k];
+    }
+  }
+
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      for (k = 0; k < m; k++)
+        assert_true(fabsf(m3[i][j] - m4[i][j]) <= FLT_EPSILON);
+    }
+  }
+
+  /* test pre compiled */
+  glmc_mat4_mul(m1, m2, m3);
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      for (k = 0; k < m; k++)
+        assert_true(fabsf(m3[i][j] - m4[i][j]) <= FLT_EPSILON);
+    }
+  }
+}
+
+int
+main(int argc, const char * argv[]) {
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_mat4_mul)
+  };
+
+  return cmocka_run_group_tests(tests,
+                                NULL,
+                                NULL);
+}