Mixing
Using Google Unit Test with own Shell
Basically I created a shell and I want to using the Google Unit Test to test if my shell does the something of the regular terminal, and I am wondering how can I copy the output of my shell output into a string and compare it. Simply, I have created a buffer which reads the output of a regular terminal, and I don't know how to use a buffer to read my shell output.
Here is my code for the Google Unit Test
TEST(lsTest, lsT) {
string bash_cmd = "ls";
std::array<char, 128> buffer;
string result;
FILE* pipe = popen(bash_cmd.c_str(),"r");
while(fgets(buffer.data(),128,pipe)!=NULL){
result += buffer.data();
}
Base* start = parse(bash_command);
start->execute(); // this would output the command of my shell
EXPECT_EQ(result,?output of start->execute()?);}
Since the execute() is a boolean function, I can't using the buffer to convert the output to a string. Is there any way to read to output of my shell into a string? Also, my shell doesn't contains any redirection which are >, >>,| tee, etc. It basically contains ls, echo,mkdir.
c++ shell
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
|
show 2 more comments
Basically I created a shell and I want to using the Google Unit Test to test if my shell does the something of the regular terminal, and I am wondering how can I copy the output of my shell output into a string and compare it. Simply, I have created a buffer which reads the output of a regular terminal, and I don't know how to use a buffer to read my shell output.
Here is my code for the Google Unit Test
TEST(lsTest, lsT) {
string bash_cmd = "ls";
std::array<char, 128> buffer;
string result;
FILE* pipe = popen(bash_cmd.c_str(),"r");
while(fgets(buffer.data(),128,pipe)!=NULL){
result += buffer.data();
}
Base* start = parse(bash_command);
start->execute(); // this would output the command of my shell
EXPECT_EQ(result,?output of start->execute()?);}
Since the execute() is a boolean function, I can't using the buffer to convert the output to a string. Is there any way to read to output of my shell into a string? Also, my shell doesn't contains any redirection which are >, >>,| tee, etc. It basically contains ls, echo,mkdir.
c++ shell
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
How does your shell prints output? Does it usestd::coutorwrite(STDOUT_FILENO, ...)orprintf? Does it also usesstd::cerrorwrite(STDERR_FILENO, ...)orfprintf(stderr, ...)?
– Kamil Cuk
Nov 21 '18 at 8:13
If it usesstd::coutor standard C++ output ostreams, you can use asnwer from this thread.
– Kamil Cuk
Nov 21 '18 at 8:24
It is using the execvp().
– Chris Lo
Nov 21 '18 at 10:25
execvp. Ok, so you can only guess what output does the underlying command uses. So, what you need to do, is redirectSTDOUT_FILENOinto astringstreamand parse it. Create amkfifoand thendup2(fifo, STDOUT_FILENO)and make sure to read from fifo intostrngstreamin another thread while thelscommand is executing. In other words, you need to do similar as shell redirecters commands stdout likels > buffer, only the buffer should be a stringstream or similar container.
– Kamil Cuk
Nov 21 '18 at 10:27
with popen() you will get the stdout of your script - but you won't get eventual errors to stderr. See this stackoverflow.com/questions/6900577/c-popen-wont-catch-stderr
– Sigismondo
Nov 21 '18 at 10:34
|
show 2 more comments
Basically I created a shell and I want to using the Google Unit Test to test if my shell does the something of the regular terminal, and I am wondering how can I copy the output of my shell output into a string and compare it. Simply, I have created a buffer which reads the output of a regular terminal, and I don't know how to use a buffer to read my shell output.
Here is my code for the Google Unit Test
TEST(lsTest, lsT) {
string bash_cmd = "ls";
std::array<char, 128> buffer;
string result;
FILE* pipe = popen(bash_cmd.c_str(),"r");
while(fgets(buffer.data(),128,pipe)!=NULL){
result += buffer.data();
}
Base* start = parse(bash_command);
start->execute(); // this would output the command of my shell
EXPECT_EQ(result,?output of start->execute()?);}
Since the execute() is a boolean function, I can't using the buffer to convert the output to a string. Is there any way to read to output of my shell into a string? Also, my shell doesn't contains any redirection which are >, >>,| tee, etc. It basically contains ls, echo,mkdir.
c++ shell
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
Basically I created a shell and I want to using the Google Unit Test to test if my shell does the something of the regular terminal, and I am wondering how can I copy the output of my shell output into a string and compare it. Simply, I have created a buffer which reads the output of a regular terminal, and I don't know how to use a buffer to read my shell output.
Here is my code for the Google Unit Test
TEST(lsTest, lsT) {
string bash_cmd = "ls";
std::array<char, 128> buffer;
string result;
FILE* pipe = popen(bash_cmd.c_str(),"r");
while(fgets(buffer.data(),128,pipe)!=NULL){
result += buffer.data();
}
Base* start = parse(bash_command);
start->execute(); // this would output the command of my shell
EXPECT_EQ(result,?output of start->execute()?);}
Since the execute() is a boolean function, I can't using the buffer to convert the output to a string. Is there any way to read to output of my shell into a string? Also, my shell doesn't contains any redirection which are >, >>,| tee, etc. It basically contains ls, echo,mkdir.
c++ shell
c++ shell
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
asked Nov 21 '18 at 8:05
Chris LoChris Lo
61
61
How does your shell prints output? Does it usestd::coutorwrite(STDOUT_FILENO, ...)orprintf? Does it also usesstd::cerrorwrite(STDERR_FILENO, ...)orfprintf(stderr, ...)?
– Kamil Cuk
Nov 21 '18 at 8:13
If it usesstd::coutor standard C++ output ostreams, you can use asnwer from this thread.
– Kamil Cuk
Nov 21 '18 at 8:24
It is using the execvp().
– Chris Lo
Nov 21 '18 at 10:25
execvp. Ok, so you can only guess what output does the underlying command uses. So, what you need to do, is redirectSTDOUT_FILENOinto astringstreamand parse it. Create amkfifoand thendup2(fifo, STDOUT_FILENO)and make sure to read from fifo intostrngstreamin another thread while thelscommand is executing. In other words, you need to do similar as shell redirecters commands stdout likels > buffer, only the buffer should be a stringstream or similar container.
– Kamil Cuk
Nov 21 '18 at 10:27
with popen() you will get the stdout of your script - but you won't get eventual errors to stderr. See this stackoverflow.com/questions/6900577/c-popen-wont-catch-stderr
– Sigismondo
Nov 21 '18 at 10:34
|
show 2 more comments
How does your shell prints output? Does it usestd::coutorwrite(STDOUT_FILENO, ...)orprintf? Does it also usesstd::cerrorwrite(STDERR_FILENO, ...)orfprintf(stderr, ...)?
– Kamil Cuk
Nov 21 '18 at 8:13
If it usesstd::coutor standard C++ output ostreams, you can use asnwer from this thread.
– Kamil Cuk
Nov 21 '18 at 8:24
It is using the execvp().
– Chris Lo
Nov 21 '18 at 10:25
execvp. Ok, so you can only guess what output does the underlying command uses. So, what you need to do, is redirectSTDOUT_FILENOinto astringstreamand parse it. Create amkfifoand thendup2(fifo, STDOUT_FILENO)and make sure to read from fifo intostrngstreamin another thread while thelscommand is executing. In other words, you need to do similar as shell redirecters commands stdout likels > buffer, only the buffer should be a stringstream or similar container.
– Kamil Cuk
Nov 21 '18 at 10:27
with popen() you will get the stdout of your script - but you won't get eventual errors to stderr. See this stackoverflow.com/questions/6900577/c-popen-wont-catch-stderr
– Sigismondo
Nov 21 '18 at 10:34
How does your shell prints output? Does it use
std::cout or write(STDOUT_FILENO, ...) or printf? Does it also uses std::cerr or write(STDERR_FILENO, ...) or fprintf(stderr, ...)?– Kamil Cuk
Nov 21 '18 at 8:13
How does your shell prints output? Does it use
std::cout or write(STDOUT_FILENO, ...) or printf? Does it also uses std::cerr or write(STDERR_FILENO, ...) or fprintf(stderr, ...)?– Kamil Cuk
Nov 21 '18 at 8:13
If it uses
std::cout or standard C++ output ostreams, you can use asnwer from this thread.– Kamil Cuk
Nov 21 '18 at 8:24
If it uses
std::cout or standard C++ output ostreams, you can use asnwer from this thread.– Kamil Cuk
Nov 21 '18 at 8:24
It is using the execvp().
– Chris Lo
Nov 21 '18 at 10:25
It is using the execvp().
– Chris Lo
Nov 21 '18 at 10:25
execvp. Ok, so you can only guess what output does the underlying command uses. So, what you need to do, is redirect STDOUT_FILENO into a stringstream and parse it. Create a mkfifo and then dup2(fifo, STDOUT_FILENO) and make sure to read from fifo into strngstream in another thread while the ls command is executing. In other words, you need to do similar as shell redirecters commands stdout like ls > buffer, only the buffer should be a stringstream or similar container.– Kamil Cuk
Nov 21 '18 at 10:27
execvp. Ok, so you can only guess what output does the underlying command uses. So, what you need to do, is redirect STDOUT_FILENO into a stringstream and parse it. Create a mkfifo and then dup2(fifo, STDOUT_FILENO) and make sure to read from fifo into strngstream in another thread while the ls command is executing. In other words, you need to do similar as shell redirecters commands stdout like ls > buffer, only the buffer should be a stringstream or similar container.– Kamil Cuk
Nov 21 '18 at 10:27
with popen() you will get the stdout of your script - but you won't get eventual errors to stderr. See this stackoverflow.com/questions/6900577/c-popen-wont-catch-stderr
– Sigismondo
Nov 21 '18 at 10:34
with popen() you will get the stdout of your script - but you won't get eventual errors to stderr. See this stackoverflow.com/questions/6900577/c-popen-wont-catch-stderr
– Sigismondo
Nov 21 '18 at 10:34
|
show 2 more comments
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How does your shell prints output? Does it use
std::coutorwrite(STDOUT_FILENO, ...)orprintf? Does it also usesstd::cerrorwrite(STDERR_FILENO, ...)orfprintf(stderr, ...)?– Kamil Cuk
Nov 21 '18 at 8:13
If it uses
std::coutor standard C++ output ostreams, you can use asnwer from this thread.– Kamil Cuk
Nov 21 '18 at 8:24
It is using the execvp().
– Chris Lo
Nov 21 '18 at 10:25
execvp. Ok, so you can only guess what output does the underlying command uses. So, what you need to do, is redirectSTDOUT_FILENOinto astringstreamand parse it. Create amkfifoand thendup2(fifo, STDOUT_FILENO)and make sure to read from fifo intostrngstreamin another thread while thelscommand is executing. In other words, you need to do similar as shell redirecters commands stdout likels > buffer, only the buffer should be a stringstream or similar container.– Kamil Cuk
Nov 21 '18 at 10:27
with popen() you will get the stdout of your script - but you won't get eventual errors to stderr. See this stackoverflow.com/questions/6900577/c-popen-wont-catch-stderr
– Sigismondo
Nov 21 '18 at 10:34