dm: Add basic tests

Add some tests of driver model functionality. Coverage includes:

- basic init
- binding of drivers to devices using platform_data
- automatic probing of devices when referenced
- availability of platform data to devices
- lifecycle from bind to probe to remove to unbind
- renumbering within a uclass when devices are probed/removed
- calling driver-defined operations
- deactivation of drivers when removed
- memory leak across creation and destruction of drivers/uclasses
- uclass init/destroy methods
- automatic probe/remove of children/parents when needed

This function is enabled for sandbox, using CONFIG_DM_TEST.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 95 insertions, 0 deletions

diff --git a/include/dm/ut.h b/include/dm/ut.h
new file mode 100644
index 0000000..fa9eac0
--- /dev/null
+++ b/include/dm/ut.h
@@ -0,0 +1,95 @@
+/*
+ * Simple unit test library for driver model
+ *
+ * Copyright (c) 2013 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __DM_UT_H
+#define __DM_UT_H
+
+struct dm_test_state;
+
+/**
+ * ut_fail() - Record failure of a unit test
+ *
+ * @dms: Test state
+ * @fname: Filename where the error occured
+ * @line: Line number where the error occured
+ * @func: Function name where the error occured
+ * @cond: The condition that failed
+ */
+void ut_fail(struct dm_test_state *dms, const char *fname, int line,
+	     const char *func, const char *cond);
+
+/**
+ * ut_failf() - Record failure of a unit test
+ *
+ * @dms: Test state
+ * @fname: Filename where the error occured
+ * @line: Line number where the error occured
+ * @func: Function name where the error occured
+ * @cond: The condition that failed
+ * @fmt: printf() format string for the error, followed by args
+ */
+void ut_failf(struct dm_test_state *dms, const char *fname, int line,
+	      const char *func, const char *cond, const char *fmt, ...)
+			__attribute__ ((format (__printf__, 6, 7)));
+
+
+/* Assert that a condition is non-zero */
+#define ut_assert(cond)							\
+	if (!(cond)) {							\
+		ut_fail(dms, __FILE__, __LINE__, __func__, #cond);	\
+		return -1;						\
+	}
+
+/* Assert that a condition is non-zero, with printf() string */
+#define ut_assertf(cond, fmt, args...)					\
+	if (!(cond)) {							\
+		ut_failf(dms, __FILE__, __LINE__, __func__, #cond,	\
+			 fmt, ##args);					\
+		return -1;						\
+	}
+
+/* Assert that two int expressions are equal */
+#define ut_asserteq(expr1, expr2) {					\
+	unsigned int val1 = (expr1), val2 = (expr2);			\
+									\
+	if (val1 != val2) {						\
+		ut_failf(dms, __FILE__, __LINE__, __func__,		\
+			 #expr1 " == " #expr2,				\
+			 "Expected %d, got %d", val1, val2);		\
+		return -1;						\
+	}								\
+}
+
+/* Assert that two string expressions are equal */
+#define ut_asserteq_str(expr1, expr2) {					\
+	const char *val1 = (expr1), *val2 = (expr2);			\
+									\
+	if (strcmp(val1, val2)) {					\
+		ut_failf(dms, __FILE__, __LINE__, __func__,		\
+			 #expr1 " = " #expr2,				\
+			 "Expected \"%s\", got \"%s\"", val1, val2);	\
+		return -1;						\
+	}								\
+}
+
+/* Assert that two pointers are equal */
+#define ut_asserteq_ptr(expr1, expr2) {					\
+	const void *val1 = (expr1), *val2 = (expr2);			\
+									\
+	if (val1 != val2) {						\
+		ut_failf(dms, __FILE__, __LINE__, __func__,		\
+			 #expr1 " = " #expr2,				\
+			 "Expected %p, got %p", val1, val2);		\
+		return -1;						\
+	}								\
+}
+
+/* Assert that an operation succeeds (returns 0) */
+#define ut_assertok(cond)	ut_asserteq(0, cond)
+
+#endif