Correct some typos in error messages in the string command. Add a test that covers more of the code implemented in cmStringCommand.cxx, especially the error handlers.

Tests/CMakeTests/StringTestScript.cmake

@@ -0,0 +1,131 @@
+message(STATUS "testname='${testname}'")
+
+
+if(testname STREQUAL empty)
+  string()
+
+elseif(testname STREQUAL bogus)
+  string(BOGUS)
+
+elseif(testname STREQUAL random)
+  string(RANDOM r)
+  message(STATUS "r='${r}'")
+
+elseif(testname STREQUAL toupper_no_variable)
+  string(TOUPPER)
+
+elseif(testname STREQUAL ascii_no_variable)
+  string(ASCII)
+
+elseif(testname STREQUAL ascii_bad_code)
+  string(ASCII 288 bummer)
+
+elseif(testname STREQUAL configure_no_input)
+  string(CONFIGURE)
+
+elseif(testname STREQUAL configure_no_variable)
+  string(CONFIGURE "this is @testname@")
+
+elseif(testname STREQUAL configure_escape_quotes)
+  string(CONFIGURE "this is @testname@" v ESCAPE_QUOTES)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL configure_bogus)
+  string(CONFIGURE "this is @testname@" v ESCAPE_QUOTES BOGUS)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL regex_no_mode)
+  string(REGEX)
+
+elseif(testname STREQUAL regex_match_not_enough_args)
+  string(REGEX MATCH)
+
+elseif(testname STREQUAL regex_matchall_not_enough_args)
+  string(REGEX MATCHALL)
+
+elseif(testname STREQUAL regex_replace_not_enough_args)
+  string(REGEX REPLACE)
+
+elseif(testname STREQUAL regex_bogus_mode)
+  string(REGEX BOGUS)
+
+elseif(testname STREQUAL regex_match_multiple_inputs)
+  string(REGEX MATCH ".*" v input1 input2 input3 input4)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL regex_match_bad_regex)
+  string(REGEX MATCH "(.*" v input)
+
+elseif(testname STREQUAL regex_match_empty_string)
+  string(REGEX MATCH "x*" v "")
+
+elseif(testname STREQUAL regex_matchall_multiple_inputs)
+  string(REGEX MATCHALL "input" v input1 input2 input3 input4)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL regex_matchall_bad_regex)
+  string(REGEX MATCHALL "(.*" v input)
+
+elseif(testname STREQUAL regex_matchall_empty_string)
+  string(REGEX MATCHALL "x*" v "")
+
+elseif(testname STREQUAL regex_replace_ends_with_backslash)
+  string(REGEX REPLACE "input" "output\\" v input1 input2 input3 input4)
+
+elseif(testname STREQUAL regex_replace_ends_with_escaped_backslash)
+  string(REGEX REPLACE "input" "output\\\\" v input1 input2 input3 input4)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL regex_replace_has_linefeed)
+  string(REGEX REPLACE "input" "output\\n" v input1 input2 input3 input4)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL regex_replace_has_bogus_escape)
+  string(REGEX REPLACE "input" "output\\a" v input1 input2 input3 input4)
+
+elseif(testname STREQUAL regex_replace_bad_regex)
+  string(REGEX REPLACE "this (.*" "with that" v input)
+
+elseif(testname STREQUAL regex_replace_empty_string)
+  string(REGEX REPLACE "x*" "that" v "")
+
+elseif(testname STREQUAL regex_replace_out_of_range)
+  string(REGEX REPLACE "^this (.*)$" "with \\1 \\2" v "this input")
+
+elseif(testname STREQUAL compare_no_mode)
+  string(COMPARE)
+
+elseif(testname STREQUAL compare_bogus_mode)
+  string(COMPARE BOGUS)
+
+elseif(testname STREQUAL compare_not_enough_args)
+  string(COMPARE EQUAL)
+
+elseif(testname STREQUAL replace_not_enough_args)
+  string(REPLACE)
+
+elseif(testname STREQUAL replace_multiple_inputs)
+  string(REPLACE "input" "output" v input1 input2 input3 input4)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL substring_not_enough_args)
+  string(SUBSTRING)
+
+elseif(testname STREQUAL substring_bad_begin)
+  string(SUBSTRING "abcdefg" 25 100 v)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL substring_bad_end)
+  string(SUBSTRING "abcdefg" 1 100 v)
+  message(STATUS "v='${v}'")
+
+elseif(testname STREQUAL length_not_enough_args)
+  string(LENGTH)
+
+elseif(testname STREQUAL strip_not_enough_args)
+  string(STRIP)
+
+else()
+  message(FATAL_ERROR "testname='${testname}' - error: no such test in '${CMAKE_CURRENT_LIST_FILE}'")
+
+endif()