Added tests for language/java

Library/Homebrew/test/language/java_spec.rb

@@ -0,0 +1,25 @@
+require "language/java"
+
+describe Language::Java do
+  describe "#self.java_home_env" do
+    it "returns java_home path with version if version specified" do
+      java_home = described_class.java_home_env("blah")
+      expect(java_home[:JAVA_HOME]).to include(" --version blah")
+    end
+    it "returns java_home path without version if version is not specified" do
+      java_home = described_class.java_home_env
+      expect(java_home[:JAVA_HOME]).not_to include(" --version")
+    end
+  end
+
+  describe "#self.overridable_java_home_env" do
+    it "returns java_home path with version if version specified" do
+      java_home = described_class.overridable_java_home_env("blah")
+      expect(java_home[:JAVA_HOME]).to include(" --version blah")
+    end
+    it "returns java_home path without version if version is not specified" do
+      java_home = described_class.overridable_java_home_env
+      expect(java_home[:JAVA_HOME]).not_to include(" --version")
+    end
+  end
+end