standardize workflow test pattern

__tests__/verify-java.ps1

@@ -0,0 +1,11 @@
+if (!$args.Count -or !$args[0])
+{
+  throw "Must supply java version argument"
+}
+
+$java_version = & cmd.exe /c "java -version 2>&1" | Out-String
+Write-Host "Found java version: $java_version"
+if (!$java_version.Contains($args[0]))
+{
+  throw "Unexpected version"
+}

__tests__/verify-java.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+if [ -z "$1" ]; then
+  echo "Must supply java version argument"
+  exit 1
+fi
+
+java_version="$(java -version 2>&1)"
+echo "Found java version: $java_version"
+if [ -z "$(echo $java_version | grep --fixed-strings $1)" ]; then
+  echo "Unexpected version"
+  exit 1
+fi