Finding unused functions.

idea/testData/inspections/unusedSymbol/function/classMemberInheritedUsed.kt

@@ -0,0 +1,10 @@
+open class Klass {
+    fun used() {
+    }
+}
+
+class Subklass: Klass()
+
+fun main(args: Array<String>) {
+    Subklass().used()
+}

idea/testData/inspections/unusedSymbol/function/classMemberOverriddenUsed.kt

@@ -0,0 +1,13 @@
+open class Klass {
+    open fun used() {
+    }
+}
+
+class Subklass: Klass() {
+    override fun used() {
+    }
+}
+
+fun main(args: Array<String>) {
+    Subklass().used()
+}

idea/testData/inspections/unusedSymbol/function/classMemberOverride.kt

@@ -0,0 +1,9 @@
+class Klass: Iterable<String> {
+    override fun iterator(): Iterator<String> {
+        throw UnsupportedOperationException()
+    }
+}
+
+fun main(args: Array<String>) {
+    Klass()
+}

idea/testData/inspections/unusedSymbol/function/classMemberUnused.kt

@@ -0,0 +1,8 @@
+class Klass {
+    fun unused() {
+    }
+}
+
+fun main(args: Array<String>) {
+    Klass()
+}

idea/testData/inspections/unusedSymbol/function/classMemberUsed.kt

@@ -0,0 +1,8 @@
+class Klass {
+    fun used() {
+    }
+}
+
+fun main(args: Array<String>) {
+    Klass().used()
+}

idea/testData/inspections/unusedSymbol/function/inspectionData/expected.xml

@@ -0,0 +1,54 @@
+<problems>
+  <problem>
+    <file>topLevelUnused.kt</file>
+    <line>1</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/topLevelUnused.kt" />
+    <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
+    <description>Function 'unused' is never used</description>
+  </problem>
+
+  <problem>
+    <file>topLevelOnlyInImport.kt</file>
+    <line>5</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/topLevelOnlyInImport.kt" />
+    <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
+    <description>Function 'onlyInImport' is never used</description>
+  </problem>
+
+  <problem>
+    <file>local.kt</file>
+    <line>2</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/local.kt" />
+    <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
+    <description>Function 'local' is never used</description>
+  </problem>
+  <problem>
+    <file>local.kt</file>
+    <line>1</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/local.kt" />
+    <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
+    <description>Function 'outer' is never used</description>
+  </problem>
+
+  <problem>
+    <file>usedOnlyRecursively.kt</file>
+    <line>1</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/usedOnlyRecursively.kt" />
+    <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
+    <description>Function 'usedOnlyRecursively' is never used</description>
+  </problem>
+
+  <problem>
+    <file>classMemberUnused.kt</file>
+    <line>2</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/classMemberUnused.kt" />
+    <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
+    <description>Function 'unused' is never used</description>
+  </problem>
+</problems>

idea/testData/inspections/unusedSymbol/function/inspectionData/inspections.test

@@ -0,0 +1 @@
+// INSPECTION_CLASS: org.jetbrains.kotlin.idea.inspections.UnusedSymbolInspection

idea/testData/inspections/unusedSymbol/function/local.kt

@@ -0,0 +1,5 @@
+fun outer() {
+    fun local() {
+
+    }
+}

idea/testData/inspections/unusedSymbol/function/topLevelMain.kt

@@ -0,0 +1,3 @@
+fun main(args: Array<String>) {
+
+}

idea/testData/inspections/unusedSymbol/function/topLevelOnlyInImport.kt

@@ -0,0 +1,7 @@
+package foo
+
+import foo.onlyInImport
+
+fun onlyInImport() {
+
+}

idea/testData/inspections/unusedSymbol/function/topLevelUnused.kt

@@ -0,0 +1,3 @@
+fun unused() {
+
+}

idea/testData/inspections/unusedSymbol/function/topLevelUsed.kt

@@ -0,0 +1,7 @@
+fun used() {
+
+}
+
+fun main(args: Array<String>) {
+    used()
+}

idea/testData/inspections/unusedSymbol/function/usedOnlyRecursively.kt

@@ -0,0 +1,3 @@
+fun usedOnlyRecursively() {
+    usedOnlyRecursively()
+}