If you’re running a modern version of OSX then you’re likely running Java 11, which is fine until you need to run npm/gulp tests with Selenium (which requires Java8).
jenv to the rescue!
assuming you have homebrew installed
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| brew tap caskroom/versions
brew cask install java8
brew install jenv
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then either update your ~/.bash_profile or (if you have one) ~/.path file
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| export PATH="$HOME/.jenv/bin:$PATH"
eval "$(jenv init -)"
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& reload your shell.
I also created a bash alias called javaversions that translates to /usr/libexec/java_home -V
run javaversions, or /usr/libexec/java_home -V and copy the last column of for each of the JDKs you’d like to manage with jenv
ie:
$ javaversions
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| Matching Java Virtual Machines (13):
11.0.1, x86_64: "OpenJDK 11.0.1" /Library/Java/JavaVirtualMachines/openjdk-11.0.1.jdk/Contents/Home
11, x86_64: "Java SE 11" /Library/Java/JavaVirtualMachines/jdk-11.jdk/Contents/Home
11, x86_64: "OpenJDK 11" /Library/Java/JavaVirtualMachines/openjdk-11.jdk/Contents/Home
10.0.1, x86_64: "Java SE 10.0.1" /Library/Java/JavaVirtualMachines/jdk-10.0.1.jdk/Contents/Home
10, x86_64: "Java SE 10" /Library/Java/JavaVirtualMachines/jdk-10.jdk/Contents/Home
9.0.4, x86_64: "Java SE 9.0.4" /Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home
9.0.1, x86_64: "Java SE 9.0.1" /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home
1.8.0_192, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_192.jdk/Contents/Home
1.8.0_92, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_92.jdk/Contents/Home
1.8.0_77, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_77.jdk/Contents/Home
1.8.0_72, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_72.jdk/Contents/Home
1.8.0_66, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home
1.8.0_60, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home
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now let’s add Java8
jenv add /Library/Java/JavaVirtualMachines/jdk1.8.0_192.jdk/Contents/Home
you’ll see something like
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| $ oracle64-1.8.0.192 added
$ 1.8.0.192 added
[....]
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now we can run
jenv local 1.8
and then
npm test