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CFE-3020: ps output line ... is shorter than its associated header #5082

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CFE-3020: ps output line ... is shorter than its associated header #5082

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CFE-3020: ps output line ... is shorter than its associated header
tdlee Oct 25, 2022
bc1f26b
fix a potential C-code bug
tdlee Oct 25, 2022
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37 changes: 37 additions & 0 deletions tests/unit/split_process_line_test.c
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Original file line number Diff line number Diff line change
Expand Up @@ -117,6 +117,42 @@ static void test_split_line_noelapsed(void)
free_and_null_strings(field);
}

static void test_split_line_nocmd(void)
{
/* Collect all test data in one array to make alignments visible: */
static const char *lines[] = {
/* Indent any continuation lines so that it's clear that's what they are. */
/* Use the username field as a test name to confirm tests are in sync. */

"USER PID STAT VSZ NI RSS NLWP STIME ELAPSED TIME COMMAND",
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If this is exactly copied from a (ps) command, putting the command in a comment here would be helpful.

If not, is it intentional / important that the labels and values are sometimes misaligned? It could help readability if you added some spaces to align things perfectly.

"spacecmd 4 S 0 0 0 1 10:30 54:29 00:00:01 ",
"nullcmd 4 S 0 0 0 1 10:30 54:29 00:00:01 "
Comment on lines +128 to +129
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Why does line 1 end with 2 spaces and line 2 end with 1 space?

};
char *name[CF_PROCCOLS] = { 0 }; /* Headers */
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headers or labels would be a better name here.

char *field[CF_PROCCOLS] = { 0 }; /* Content */
int start[CF_PROCCOLS] = { 0 };
int end[CF_PROCCOLS] = { 0 };
int user = 0, command = 10;
time_t pstime = 1410000000;

/* Prepare data needed by tests and assert things assumed by test: */
GetProcessColumnNames(lines[0], name, start, end);
assert_string_equal(name[user], "USER");
assert_string_equal(name[command], "COMMAND");

assert_true(SplitProcLine(lines[1], pstime, name, start, end, PCA_AllColumnsPresent, field));
assert_string_equal(field[user], "spacecmd");
assert_string_equal(field[command], lines[1] + 69);
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I think it's easier and less error prone if you just compare to what string you expect here, for example:

Suggested change
assert_string_equal(field[command], lines[1] + 69);
assert_string_equal(field[command], "");


assert_true(SplitProcLine(lines[2], pstime, name, start, end, PCA_AllColumnsPresent, field));
assert_string_equal(field[user], "nullcmd");
assert_string_equal(field[command], lines[1] + 69);
Comment on lines +147 to +149
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Same as above, also unclear whether the lines[1] here is intentional or not? We are working on lines[2] now.

Suggested change
assert_true(SplitProcLine(lines[2], pstime, name, start, end, PCA_AllColumnsPresent, field));
assert_string_equal(field[user], "nullcmd");
assert_string_equal(field[command], lines[1] + 69);
assert_true(SplitProcLine(lines[2], pstime, name, start, end, PCA_AllColumnsPresent, field));
assert_string_equal(field[user], "nullcmd");
assert_string_equal(field[command], "");


/* Finally, tidy away headers: */
free_and_null_strings(name);
free_and_null_strings(field);
}

static void test_split_line_longcmd(void)
{
static const char *lines[] = {
Expand Down Expand Up @@ -909,6 +945,7 @@ int main(void)
unit_test(test_split_line_challenges),
unit_test(test_split_line_noelapsed),
unit_test(test_split_line_elapsed),
unit_test(test_split_line_nocmd),
unit_test(test_split_line_longcmd),
unit_test(test_split_line),
unit_test(test_split_line_serious_overspill),
Expand Down