A bash function to run golang test coverage for specific module in your project and open the report in your web browser.

go-gen-cover.sh

function go-gen-cover() {
    # Check dependencies
    if ! type xargs &>/dev/null; then
        echo "error: 'xargs' command is missing"
        return 1
    fi

    if ! type go &>/dev/null; then
        echo "error: 'go' command is missing"
        return 1
    fi

    module_name=$1
    if [ -z "$module_name" ]; then
        echo "usage: $0 <module_name_pattern>"
        return 1
    fi

    # temporary output
    tDir="/tmp/go-gen-cover"
    rm -rf $tDir
    mkdir -p $tDir

    t="$tDir/go-cover.$$.tmp"

    # run the test and generate the coverage > $t.html
    go list ./... | grep $module_name | xargs go test -coverprofile=$t && go tool cover -html=$t -o $t.html

    # remove the out file
    unlink $t

    # open in respective application (e.g. web browser)
    if type open &>/dev/null; then
        open $t.html
    elif type xdg-open &>/dev/null; then
        xdg-open $t.html
    fi
}