config: add test cases for empty value and no value config variables.

diff --git a/t/t0040-parse-options.sh b/t/t0040-parse-options.sh
index 8e4d74b2005b4c55eefc460d47ed121f664b85f5..0e2933a984fcf6a23b60e54ed43c411c699d4347 100755 (executable)
--- a/t/t0040-parse-options.sh
+++ b/t/t0040-parse-options.sh
@@ -18,6 +18,8 @@ string options
     -s, --string <string>
                           get a string
     --string2 <str>       get another string
+    --st <st>             get another string (pervert ordering)
+    -o <str>              get another string
 
 EOF
 
@@ -67,4 +69,49 @@ test_expect_success 'intermingled arguments' '
        git diff expect output
 '
 
+cat > expect << EOF
+boolean: 0
+integer: 2
+string: (not set)
+EOF
+
+test_expect_success 'unambiguously abbreviated option' '
+       test-parse-options --int 2 --boolean --no-bo > output 2> output.err &&
+       test ! -s output.err &&
+       git diff expect output
+'
+
+test_expect_success 'unambiguously abbreviated option with "="' '
+       test-parse-options --int=2 > output 2> output.err &&
+       test ! -s output.err &&
+       git diff expect output
+'
+
+test_expect_success 'ambiguously abbreviated option' '
+       test-parse-options --strin 123;
+       test $? = 129
+'
+
+cat > expect << EOF
+boolean: 0
+integer: 0
+string: 123
+EOF
+
+test_expect_success 'non ambiguous option (after two options it abbreviates)' '
+       test-parse-options --st 123 > output 2> output.err &&
+       test ! -s output.err &&
+       git diff expect output
+'
+
+cat > expect.err << EOF
+error: did you mean \`--boolean\` (with two dashes ?)
+EOF
+
+test_expect_success 'detect possible typos' '
+       ! test-parse-options -boolean > output 2> output.err &&
+       test ! -s output &&
+       git diff expect.err output.err
+'
+
 test_done