test: env: Add test for verifying env attrs

Add a test of the env_attr_lookup() function.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

test/env/Makefile

@@ -5,3 +5,4 @@
 #
 
 obj-y += cmd_ut_env.o
+obj-y += attr.o

test/env/attr.c

+/*
+ * (C) Copyright 2015
+ * Joe Hershberger, National Instruments, joe.hershberger@ni.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <command.h>
+#include <env_attr.h>
+#include <test/env.h>
+#include <test/ut.h>
+
+static int env_test_attrs_lookup(struct unit_test_state *uts)
+{
+	char attrs[32];
+
+	ut_assertok(env_attr_lookup("foo:bar", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_assertok(env_attr_lookup(",foo:bar", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_assertok(env_attr_lookup(",foo:bar,", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_assertok(env_attr_lookup(" foo:bar", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_assertok(env_attr_lookup("foo : bar", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_assertok(env_attr_lookup(" foo: bar ", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_assertok(env_attr_lookup("foo:bar ", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_assertok(env_attr_lookup(",foo:bar,goo:baz", "foo", attrs));
+	ut_asserteq_str("bar", attrs);
+
+	ut_asserteq(-ENOENT, env_attr_lookup(",,", "foo", attrs));
+
+	ut_asserteq(-ENOENT, env_attr_lookup("goo:baz", "foo", attrs));
+
+	ut_assertok(env_attr_lookup("foo:bar,foo:bat,foo:baz", "foo", attrs));
+	ut_asserteq_str("baz", attrs);
+
+	ut_assertok(env_attr_lookup(
+		" foo : bar , foo : bat , foot : baz ", "foo", attrs));
+	ut_asserteq_str("bat", attrs);
+
+	ut_assertok(env_attr_lookup(
+		" foo : bar , foo : bat , ufoo : baz ", "foo", attrs));
+	ut_asserteq_str("bat", attrs);
+
+	ut_asserteq(-EINVAL, env_attr_lookup(NULL, "foo", attrs));
+	ut_asserteq(-EINVAL, env_attr_lookup("foo:bar", "foo", NULL));
+
+	return 0;
+}
+ENV_TEST(env_test_attrs_lookup, 0);