mirror of https://github.com/ArduPilot/ardupilot
40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
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#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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}
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AP_GTEST_MAIN()
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