split some tests in JetDiagnosticsTest

compiler/testData/diagnostics/tests/scopes/ImportFromCurrentWithDifferentName.jet

@@ -0,0 +1,5 @@
+package a
+
+import A as ER
+
+class A()

compiler/testData/diagnostics/tests/scopes/ImportObjectHidesCurrentPackage.jet

@@ -0,0 +1,12 @@
+//FILE:a.kt
+package a
+
+// no error is reported
+import b.a
+
+fun foo() = a
+
+//FILE:b.kt
+package b
+
+object a {}

compiler/testData/diagnostics/tests/scopes/Imports-hidden.jet

@@ -1,45 +1,15 @@
 //FILE:a.kt
 package a
 
-import <!USELESS_HIDDEN_IMPORT!>b.a<!>
-import c.a
-import <!USELESS_SIMPLE_IMPORT!>b<!>
-
-import b.bar
-import c.foo
-import b.foo
-
-import A as ER
-import <!USELESS_SIMPLE_IMPORT!>B<!>
-
-class A() {}
-object B {}
+import <!USELESS_HIDDEN_IMPORT!>b.O<!>
+import c.O
 
 //FILE:b.kt
 package b
 
-object a {}
-
-class B() {
-    class object {
-        object O {}
-    }
-}
-
-fun foo() {}
-fun bar() {}
+object O {}
 
 //FILE:c.kt
 package c
 
-fun a() {}
-
-object a {}
-
-class C() {
-    class object {
-        object O {}
-    }
-}
-
-fun foo() {}
+object O {}

compiler/testData/diagnostics/tests/scopes/ImportsConflicting.jet

@@ -0,0 +1,15 @@
+//FILE:a.kt
+package a
+
+import b.foo
+import c.foo // TODO: need warning here
+
+//FILE:b.kt
+package b
+
+fun foo() = 2
+
+//FILE:c.kt
+package c
+
+fun foo() = 1

compiler/testData/diagnostics/tests/scopes/ImportsUselessSimpleImport.jet

@@ -0,0 +1,5 @@
+package a
+
+import <!USELESS_SIMPLE_IMPORT!>B<!>
+
+object B {}

compiler/testData/diagnostics/tests/scopes/ImportsUselessSimpleImport2.jet

@@ -0,0 +1,9 @@
+// FILE:a.kt
+package a
+
+import <!USELESS_SIMPLE_IMPORT!>b<!>
+
+// FILE:b.kt
+package b
+
+class B()