Test for extra properties files

sbt/src/sbt-test/project/extra-environment/changes/first.properties

@@ -0,0 +1 @@
+first.property=set-first

sbt/src/sbt-test/project/extra-environment/changes/second.properties

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+first.property=set-first
+second.property=set-second

sbt/src/sbt-test/project/extra-environment/project/build.properties

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+project.name=test-env
+project.version=1.0

sbt/src/sbt-test/project/extra-environment/project/build/Test.scala

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+import sbt._
+
+class Test(info: ProjectInfo) extends DefaultProject(info)
+{
+	lazy val FirstDefault = "a"
+	lazy val SecondDefault = "b"
+	lazy val FirstSet = "set-first"
+	lazy val SecondSet = "set-second"
+
+	lazy val extra = new BasicEnvironment
+	{
+		def log = Test.this.log
+		def envBackingPath = info.builderPath / "extra.properties"
+
+		lazy val firstProperty = propertyOptional[String](FirstDefault)
+		lazy val secondProperty = propertyOptional[String](SecondDefault)
+	}
+
+	import extra.{firstProperty, secondProperty}
+
+	lazy val checkFirstUnset = checkTask(firstProperty, FirstDefault, "first.property")
+	lazy val checkFirstSet = checkTask(firstProperty, FirstSet, "first.property")
+	lazy val checkSecondUnset = checkTask(secondProperty, SecondDefault, "second.property")
+	lazy val checkSecondSet = checkTask(secondProperty, SecondSet, "second.property")
+
+	def checkTask[T](property: extra.Property[T], expected: T, name: String): Task =
+		task { if(property.value == expected) None else Some("Expected "+name+" to be '" + expected + "', was: " + property.value) }
+
+}

sbt/src/sbt-test/project/extra-environment/test

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+# check that both properties are unset
+
+> check-first-unset
+->check-first-set
+> check-second-unset
+->check-second-set
+
+# create the extra properties file with only the first property set
+
+$ copy-file changes/first.properties project/extra.properties
+> reload
+
+-> check-first-unset
+>check-first-set
+> check-second-unset
+->check-second-set
+
+# create the extra properties file with both properties set
+
+$ copy-file changes/second.properties project/extra.properties
+> reload
+
+-> check-first-unset
+>check-first-set
+-> check-second-unset
+>check-second-set