Diff: Answer test results
This page exposes the results of running answer tests on STACK test cases. This page is automatically generated from the STACK unit tests and is designed to show question authors what answer tests actually do. This includes cases where answer tests currentl fail, which gives a negative expected mark. Comments and further test cases are very welcome.
Diff
| Test | ? | Student response | Teacher answer | Opt | Mark | Answer note | |
|---|---|---|---|---|---|---|---|
| Diff | 1/0 |
3*x^2 |
-1 | STACKERROR_OPTION. | |||
| TEST_FAILED | |||||||
| The answer test failed to execute correctly: please alert your teacher. Missing option when executing the test. | |||||||
| Diff | 0 |
1/0 |
(x |
-1 | STACKERROR_OPTION. | ||
| TEST_FAILED | |||||||
| The answer test failed to execute correctly: please alert your teacher. Option field is invalid. You have a missing right bracket ) in the expression: (x. | |||||||
| Diff | 1/0 |
3*x^2 |
x |
-1 | ATDiff_STACKERROR_SAns. | ||
| Diff | 0 |
1/0 |
x |
-1 | ATDiff_STACKERROR_TAns. | ||
| Diff | 0 |
0 |
1/0 |
-1 | ATDiff_STACKERROR_Opt. | ||
| Basic tests | |||||||
| Diff | 3*x^2 |
3*x^2 |
x |
1 | ATDiff_true. | ||
| Diff | 3*X^2 |
3*x^2 |
x |
0 | ATDiff_var_SB_notSA. | ||
| Diff | x^4/4 |
3*x^2 |
x |
0 | ATDiff_int. | ||
| It looks like you have integrated instead! | |||||||
| Diff | x^4/4+1 |
3*x^2 |
x |
0 | ATDiff_int. | ||
| It looks like you have integrated instead! | |||||||
| Diff | x^4/4+c |
3*x^2 |
x |
0 | ATDiff_int. | ||
| It looks like you have integrated instead! | |||||||
| Diff | y=x^4/4 |
x^4/4 |
x |
0 | ATDiff_SA_not_expression. | ||
| Your answer should be an expression, not an equation, inequality, list, set or matrix. | |||||||
| Diff | x^4/4 |
y=x^4/4 |
x |
0 | |||
| Diff | y=x^4/4 |
y=x^4/4 |
x |
0 | ATDiff_SA_not_expression. | ||
| Your answer should be an expression, not an equation, inequality, list, set or matrix. | |||||||
| Diff | 6000*(x-a)^5999 |
6000*(x-a)^5999 |
x |
1 | ATDiff_true. | ||
| Diff | 5999*(x-a)^5999 |
6000*(x-a)^5999 |
x |
0 | |||
| Variable mismatch tests | |||||||
| Diff | y^2-2*y+1 |
x^2-2*x+1 |
x |
0 | ATDiff_var_SB_notSA. | ||
| Diff | x^2-2*x+1 |
y^2-2*y+1 |
x |
0 | ATDiff_var_SA_notSB. | ||
| Diff | y^2+2*y+1 |
x^2-2*x+1 |
z |
0 | ATDiff_var_notSASB_SAnceSB. | ||
| Diff | x^4/4 |
3*x^2 |
y |
0 | |||
| Edge cases | |||||||
| Diff | e^x+c |
e^x |
x |
0 | ATDiff_int. | ||
| It looks like you have integrated instead! | |||||||
| Diff | e^x+2 |
e^x |
x |
0 | ATDiff_int. | ||
| It looks like you have integrated instead! | |||||||
| Diff | n*x^n |
n*x^(n-1) |
x |
-1 | ATDiff_STACKERROR_SAns. | ||
| TEST_FAILED | |||||||
| The answer test failed to execute correctly: please alert your teacher. CAS failed to return any data due to timeout. | |||||||
| Diff | n*x^n |
(assume(n>0), n*x^(n-1)) |
x |
0 | |||