Add test for auto libs directory

plugin/src/functionalTest/groovy/me/champeau/gradle/igp/BasicFunctionalTest.groovy

@@ -29,4 +29,26 @@ class BasicFunctionalTest extends AbstractFunctionalTest {
         errorOutputContains '''Included build '/xxx' does not exist'''
     }
 
+    def "can automatically use local repository instead of checking out"() {
+        withSample 'basic'
+
+        file("gradle.properties") << """
+auto.include.git.dirs=${new File("../samples/repo").absolutePath}
+        """
+
+        when:
+        run 'dependencies', '--configuration', 'compileClasspath'
+
+        then:
+        tasks {
+            succeeded ':dependencies'
+        }
+
+        outputContains '''compileClasspath - Compile classpath for source set 'main'.
+\\--- com.acme.somelib:somelib1:0.0 -> project :testlib0
+     +--- org.apache.commons:commons-math3:3.6.1 FAILED
+     \\--- dummy:for-test:1.0 FAILED
+'''
+    }
+
 }

samples/repo/testlib0/build.gradle

@@ -0,0 +1,19 @@
+plugins {
+    id 'java-library'
+}
+
+group = 'com.acme.somelib'
+version = '1.0'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+    api 'org.apache.commons:commons-math3:3.6.1'
+    api 'dummy:for-test:1.0'
+
+    implementation 'com.google.guava:guava:29.0-jre'
+
+    testImplementation 'junit:junit:4.13'
+}

samples/repo/testlib0/settings.gradle

@@ -0,0 +1,10 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ *
+ * Detailed information about configuring a multi-project build in Gradle can be found
+ * in the user manual at https://docs.gradle.org/6.5/userguide/multi_project_builds.html
+ */
+
+rootProject.name = 'somelib1'

samples/repo/testlib0/src/main/java/com/acme/somelib1/Library.java

@@ -0,0 +1,10 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package com.acme.somelib1;
+
+public class Library {
+    public boolean someLibraryMethod() {
+        return true;
+    }
+}

samples/repo/testlib0/src/test/java/com/acme/somelib1/LibraryTest.java

@@ -0,0 +1,14 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package com.acme.somelib1;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class LibraryTest {
+    @Test public void testSomeLibraryMethod() {
+        Library classUnderTest = new Library();
+        assertTrue("someLibraryMethod should return 'true'", classUnderTest.someLibraryMethod());
+    }
+}