Add more tests for go to definition with imports

Author: Duhemm

language-server/test/dotty/tools/languageserver/DefinitionTest.scala

@@ -137,4 +137,55 @@ class DefinitionTest {
      .definition(m5 to m6, List(m1 to m2))
   }
 
+  @Test def goToDefinitionRenamedImport: Unit = {
+    withSources(
+      code"""package a
+             class ${m1}Foo${m2}""",
+      code"""package b
+             import a.{${m3}Foo${m4} => ${m5}Bar${m6}}
+             class C extends ${m7}Bar${m8}"""
+    ).definition(m1 to m2, List(m1 to m2))
+     .definition(m3 to m4, List(m1 to m2))
+     .definition(m5 to m6, List(m1 to m2))
+     .definition(m7 to m8, List(m1 to m2))
+  }
+
+  @Test def goToDefinitionImportAlternatives: Unit = {
+    withSources(
+      code"""package a
+             class ${m1}Foo${m2}
+             object ${m3}Foo${m4}""",
+      code"""package b
+             import a.${m5}Foo${m6}
+             class C extends ${m7}Foo${m8} {
+               val bar = ${m9}Foo${m10}
+             }"""
+    ).definition(m1 to m2, List(m1 to m2))
+     .definition(m3 to m4, List(m3 to m4))
+     .definition(m5 to m6, List(m1 to m2, m3 to m4))
+     .definition(m7 to m8, List(m1 to m2))
+     .definition(m9 to m10, List(m3 to m4))
+  }
+
+  @Test def goToDefinitionImportAlternativesWithRename: Unit = {
+    val m11 = new util.embedded.CodeMarker("m11")
+    val m12 = new util.embedded.CodeMarker("m12")
+
+    withSources(
+      code"""package a
+             class ${m1}Foo${m2}
+             object ${m3}Foo${m4}""",
+      code"""package b
+             import a.{${m5}Foo${m6} => ${m7}Bar${m8}}
+             class C extends ${m9}Bar${m10} {
+               val buzz = ${m11}Bar${m12}
+             }"""
+    ).definition(m1 to m2, List(m1 to m2))
+     .definition(m3 to m4, List(m3 to m4))
+     .definition(m5 to m6, List(m1 to m2, m3 to m4))
+     .definition(m7 to m8, List(m1 to m2, m3 to m4))
+     .definition(m9 to m10, List(m1 to m2))
+     .definition(m11 to m12, List(m3 to m4))
+  }
+
 }