tests: Add Unit tests for wl_map and wl_array data structures

We use a simple test-runner helper that runs each test in a separate
process and reports the pass/fail rate at the end.

tests/array-test.c

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+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+#include "../src/wayland-private.h"
+#include "test-runner.h"
+
+TEST(array_init)
+{
+	const int iterations = 4122; /* this is arbitrary */
+	int i;
+
+	/* Init array an arbitray amount of times and verify the
+	 * defaults are sensible. */
+
+	for (i = 0; i < iterations; i++) {
+		struct wl_array array;
+		wl_array_init(&array);
+		assert(array.size == 0);
+		assert(array.alloc == 0);
+		assert(array.data == 0);
+	}
+}
+
+TEST(array_add)
+{
+	struct mydata {
+		int a;
+		unsigned b;
+		double c;
+		double d;
+	};
+
+	const int iterations = 1321; /* this is arbitrary */
+	const int datasize = sizeof(struct mydata);
+	struct wl_array array;
+	int i;
+
+	wl_array_init(&array);
+
+	/* add some data */
+	for (i = 0; i < iterations; i++) {
+		struct mydata* ptr = wl_array_add(&array, datasize);
+		assert((i + 1) * datasize == array.size);
+
+		ptr->a = i * 3;
+		ptr->b = -i;
+		ptr->c = (double)(i);
+		ptr->d = (double)(i / 2.);
+	}
+
+	/* verify the data */
+	for (i = 0; i < iterations; ++i) {
+		const int index = datasize * i;
+		struct mydata* check = (struct mydata*)(array.data + index);
+
+		assert(check->a == i * 3);
+		assert(check->b == -i);
+		assert(check->c == (double)(i));
+		assert(check->d == (double)(i/2.));
+	}
+
+	wl_array_release(&array);
+}
+
+TEST(array_copy)
+{
+	const int iterations = 1529; /* this is arbitrary */
+	struct wl_array source;
+	struct wl_array copy;
+	int i;
+
+	wl_array_init(&source);
+
+	/* add some data */
+	for (i = 0; i < iterations; i++) {
+		int *p = wl_array_add(&source, sizeof(int));
+		*p = i * 2 + i;
+	}
+
+	/* copy the array */
+	wl_array_init(&copy);
+	wl_array_copy(&copy, &source);
+
+	/* check the copy */
+	for (i = 0; i < iterations; i++) {
+		const int index = sizeof(int) * i;
+		int *s = (int *)(source.data + index);
+		int *c = (int *)(copy.data + index);
+
+		assert(*s == *c); /* verify the values are the same */
+		assert(s != c); /* ensure the addresses aren't the same */
+		assert(*s == i * 2 + i); /* sanity check */
+	}
+
+	wl_array_release(&source);
+	wl_array_release(&copy);
+}