Added functional tests for jlink and jmod

src/test/resources/jlink/.gitignore

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+build/javac
+build/jar

src/test/resources/jlink/Makefile

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+.PHONY: clean
+clean:
+	rm -rf build
+
+.PHONY: compile
+compile: clean
+	javac -d build/javac --module-source-path "./*/src" --module dev.mccue.tree,dev.mccue.apple
+
+.PHONY: package
+package: compile
+	mkdir -p build/jar
+
+	jar --create --file build/jar/dev.mccue.apple.jar \
+		-C build/javac/dev.mccue.apple . \
+		-C dev.mccue.apple/res .
+	jar --create --file build/jar/dev.mccue.tree.jar \
+		-C build/javac/dev.mccue.tree .
+
+.PHONY: link
+link: package
+	mkdir -p build/jmod
+
+	jmod create \
+		--legal-notices dev.mccue.apple/legal \
+		--class-path build/jar/dev.mccue.apple.jar \
+		build/jmod/dev.mccue.apple.jmod
+
+	jmod create \
+		--class-path build/jar/dev.mccue.tree.jar \
+		build/jmod/dev.mccue.tree.jmod
+
+	jlink \
+		--module-path build/jmod \
+		--add-modules dev.mccue.tree \
+		--launcher tree=dev.mccue.tree/dev.mccue.tree.Tree \
+		--output build/jlink
+
+.PHONY: test
+test: link
+	./build/jlink/bin/tree

src/test/resources/jlink/dev.mccue.apple/dev.mccue.apple.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/test/resources/jlink/dev.mccue.apple/legal/LICENSE

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+Apples are GOD'S creation. You have no right to them.

src/test/resources/jlink/dev.mccue.apple/res/dev/mccue/apple/color.txt

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+red

src/test/resources/jlink/dev.mccue.apple/src/dev/mccue/apple/Apple.java

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+package dev.mccue.apple;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.util.Objects;
+
+public final class Apple {
+    public String color() {
+        try {
+            return new String(
+                    Objects.requireNonNull(
+                            Apple.class.getResourceAsStream("/dev/mccue/apple/color.txt")
+                    ).readAllBytes()
+            );
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+
+    }
+}

src/test/resources/jlink/dev.mccue.apple/src/module-info.java

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+module dev.mccue.apple {
+    exports dev.mccue.apple;
+}

src/test/resources/jlink/dev.mccue.tree/dev.mccue.tree.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="dev.mccue.apple" />
+  </component>
+</module>

src/test/resources/jlink/dev.mccue.tree/src/dev/mccue/tree/Tree.java

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+package dev.mccue.tree;
+
+import dev.mccue.apple.Apple;
+
+public final class Tree {
+    public Apple bearFruit() {
+        return new Apple();
+    }
+
+    public static void main(String[] args) {
+        System.out.println(
+                new Tree().bearFruit().color()
+        );
+    }
+}

src/test/resources/jlink/dev.mccue.tree/src/module-info.java

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+module dev.mccue.tree {
+    requires dev.mccue.apple;
+}