mirror of https://github.com/ArduPilot/ardupilot
63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
#include <AP_gtest.h>
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#include <AP_HAL/HAL.h>
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#include <AP_HAL/Util.h>
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const AP_HAL::HAL& hal = AP_HAL::get_HAL();
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#define streq(x, y) (!strcmp(x, y))
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// from the GNU snprintf manpage:
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// The functions snprintf() and vsnprintf() do not write more than size
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// bytes (including the terminating null byte ('\0')). If the output was
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// truncated due to this limit, then the return value is the number of
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// characters (excluding the terminating null byte) which would have been
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// written to the final string if enough space had been available. Thus,
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// a return value of size or more means that the output was truncated.
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TEST(vsnprintf_Test, Basic)
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{
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char output[300];
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{
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int bytes_required = hal.util->snprintf(output, ARRAY_SIZE(output), "Fred: %u", 37);
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EXPECT_TRUE(streq(output, "Fred: 37"));
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EXPECT_EQ(bytes_required, 8);
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}
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{
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int bytes_required = hal.util->snprintf(output, 3, "Fred: %u", 37);
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EXPECT_TRUE(streq(output, "Fr"));
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EXPECT_EQ(bytes_required, 8);
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}
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{
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snprintf(output, ARRAY_SIZE(output), "0123");
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int bytes_required = hal.util->snprintf(output, 0, "Fred: %u", 37);
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EXPECT_TRUE(streq(output, "0123"));
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EXPECT_EQ(bytes_required, 8);
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}
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{ // ensure rest of buffer survives
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memset(output, 'A', 10);
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const int bytes_required = snprintf(output, 5, "012345678");
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EXPECT_TRUE(streq(output, "0123"));
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EXPECT_EQ(bytes_required, 9);
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EXPECT_EQ(output[6], 'A');
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}
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{ // simple float
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const int bytes_required = hal.util->snprintf(output, ARRAY_SIZE(output), "%f", 1/3.0);
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EXPECT_EQ(bytes_required, 8);
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EXPECT_TRUE(streq(output, "0.333333"));
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}
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{ // less simple float
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const int bytes_required = hal.util->snprintf(output, ARRAY_SIZE(output), "%30.9f", 1/3.0);
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EXPECT_EQ(bytes_required, 28);
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EXPECT_TRUE(streq(output, " 0.3333333"));
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}
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{ // simple string
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const int bytes_required = hal.util->snprintf(output, ARRAY_SIZE(output), "%s %s %c", "ABC", "DEF", 'x');
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EXPECT_EQ(bytes_required, 9);
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EXPECT_TRUE(streq(output, "ABC DEF x"));
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}
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}
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AP_GTEST_MAIN()
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