问题:

I am using imagemagick to compare two screenshots in windows environment.

https://blog.codecentric.de/en/2017/09/robot-framework-compare-images-screenshots/

   *** Settings *** Library   String Library   OperatingSystem  *** Variables *** ${IMAGE_COMPARATOR_COMMAND}   C:\\"Program Files"\\ImageMagick-7.0.7-Q16\\convert.exe   *** Test Cases *** Image Comparison Ok   Compare Images    C:/Users/user/imagecompare/Test/src/reference-screenshots/reference-1.png    C:/Users/user/imagecompare/Test/src/test-screenshots/test-1.png   0.1   Image Comparison NOk   Compare Images    C:/Users/user/imagecompare/Test/src/reference-screenshots/reference-1.png    C:/Users/user/imagecompare/Test/src/test-screenshots/test-1.png   0.1  *** Keywords *** Compare Images    [Arguments]      ${Reference_Image_Path}    ${Test_Image_Path}    ${Allowed_Threshold}    ${TEMP}=         Replace String     ${IMAGE_COMPARATOR_COMMAND}    __REFERENCE__     ${Reference_Image_Path}    ${COMMAND}=      Replace String     ${TEMP}    __TEST__     ${Test_Image_Path}    Log              Executing: ${COMMAND}    ${RC}            ${OUTPUT}=     Run And Return Rc And Output     ${COMMAND}    Log              Return Code: ${RC}    Log              Return Output: ${OUTPUT}    ${RESULT}        Evaluate    ${OUTPUT} < ${Allowed_Threshold}    Should be True   ${RESULT}

But getting below issue:

    KEYWORD BuiltIn . Log Return Output: ${OUTPUT} Documentation:   Logs the given message with the given level. Start / End / Elapsed:  20171016 15:45:38.561 / 20171016 15:45:38.562 / 00:00:00.001 15:45:38.561    INFO    Return Output: The system cannot find the path specified.    00:00:00.003KEYWORD ${RESULT} = BuiltIn . Evaluate ${OUTPUT} < ${Allowed_Threshold} Documentation:   Evaluates the given expression in Python and returns the results. Start / End / Elapsed:  20171016 15:45:38.562 / 20171016 15:45:38.565 / 00:00:00.003 15:45:38.563    FAIL    Evaluating expression 'The system cannot find the path specified. < 0.1' failed: SyntaxError: invalid syntax (<string>, line 1)

回答1:

If you want to use the "legacy" convert command with ImageMagick v7, you need to click the option during installation of ImageMagick that says "Install legacy tools".

Or, use the new command which is:

magick input.png ... output.png

rather than:

convert input.png ... output.png

So, if you know how to change your configuration variable IMAGE_COMPARATOR_COMMAND to C:\\"Program File"\\ImageMagick-7.0.7-Q16\\magick, you can do it without re-installing ImageMagick.

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