rename to test_gradlew-fdroid to match Python unittest naming

tests/test_gradlew-fdroid

@@ -0,0 +1,75 @@
+#!/bin/bash
+
+red='\033[0;31m'
+green='\033[0;32m'
+nocolor='\033[0m'
+
+TEST_VALUE='HELLO WORLD!'
+
+run_test() {
+    cd $source_files/$1
+    printf "\n${1}:\n"
+    if ($basedir/gradlew-fdroid 2>/dev/null || true) | grep -Fo "$2"; then
+	printf "${green}passed: $1\n"
+    else
+	printf "${red}ERROR: $2 not found in $1\n"
+	((exit_value++))
+    fi
+    printf $nocolor
+}
+
+download_cache_test() {
+    if $basedir/gradlew-fdroid helloWorld 2>/dev/null | grep -F "$TEST_VALUE"; then
+	printf "${green}passed: $1\n"
+    else
+	printf "${red}ERROR: \n"
+	$basedir/gradlew-fdroid helloWorld
+	((exit_value++))
+    fi
+    printf $nocolor
+}
+
+exit_value=0
+basedir=$(cd $(dirname $0)/..; pwd)
+source_files=$basedir/tests/source-files
+export https_proxy=127.7.7.7:7 # fake proxy to block downloading
+
+run_test osmandapp/osmand 2.2.1
+run_test com.integreight.onesheeld 3.3
+run_test se.manyver/android 5.5
+run_test yuriykulikov/AlarmClock 5.1.1
+
+printf "\n\nforce test files to have Windows linefeeds:\n"
+tmpdir=`mktemp -d`
+cp -a $source_files/osmandapp $source_files/yuriykulikov $tmpdir/
+awk 'sub("$", "\r")' \
+    $source_files/yuriykulikov/AlarmClock/gradle/wrapper/gradle-wrapper.properties \
+    > $tmpdir/yuriykulikov/AlarmClock/gradle/wrapper/gradle-wrapper.properties
+awk 'sub("$", "\r")' \
+    $source_files/osmandapp/osmand/build.gradle \
+    > $tmpdir/osmandapp/osmand/build.gradle
+source_files=$tmpdir
+
+run_test yuriykulikov/AlarmClock 5.1.1
+run_test osmandapp/osmand 2.2.1
+
+cd $tmpdir
+mkdir -p download_cache_test/gradle/wrapper
+cd download_cache_test
+echo 'distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip' \
+     > gradle/wrapper/gradle-wrapper.properties
+printf "task helloWorld {\n\tdoLast {\n\t\tprintln '$TEST_VALUE'\n\t}\n}" > build.gradle
+
+export GRADLE_VERSION_DIR=$tmpdir/gradle/versions
+mkdir -p $GRADLE_VERSION_DIR
+
+unset https_proxy
+printf "download, unpack, and run: "
+download_cache_test 7.3
+printf "unpack and run: "
+rm -rf $GRADLE_VERSION_DIR/7.3/
+download_cache_test 7.3
+printf "just run: "
+download_cache_test 7.3
+
+exit $exit_value