Add tests for enhanced java signatures based on AbstractResolvedCallsTest.

Refactor AbstractResolvedCallsTest to support multiple carets (multiple methods being tested  for resolve) in testdata file.

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalEmpty.kt

@@ -0,0 +1,6 @@
+import java.util.*
+
+fun use() {
+    Optional.<caret>empty<String>()
+    Optional.<caret>empty<String?>()
+}

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalEmpty.txt

@@ -0,0 +1,13 @@
+import java.util.*
+
+fun use() {
+    Optional.empty<String>()
+        // SUCCESS
+        // ORIGINAL:    fun <T : Any!> empty(): Optional<T> defined in java.util.Optional
+        // SUBSTITUTED: fun <T : Any!> empty(): Optional<String> defined in java.util.Optional
+    Optional.empty<String?>()
+        // SUCCESS
+        // ORIGINAL:    fun <T : Any!> empty(): Optional<T> defined in java.util.Optional
+        // SUBSTITUTED: fun <T : Any!> empty(): Optional<String> defined in java.util.Optional
+}
+

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalGet.kt

@@ -0,0 +1,9 @@
+import java.util.*
+
+fun use(v: Optional<String>) {
+    v.<caret>get()
+}
+
+fun use2(v: Optional<String?>) {
+    v.<caret>get()
+}

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalGet.txt

@@ -0,0 +1,16 @@
+import java.util.*
+
+fun use(v: Optional<String>) {
+    v.get()
+        // SUCCESS
+        // ORIGINAL:    fun get(): T defined in java.util.Optional
+        // SUBSTITUTED: fun get(): String defined in java.util.Optional
+}
+
+fun use2(v: Optional<String?>) {
+    v.get()
+        // SUCCESS
+        // ORIGINAL:    fun get(): T defined in java.util.Optional
+        // SUBSTITUTED: fun get(): String defined in java.util.Optional
+}
+

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalIfPresent.kt

@@ -0,0 +1,9 @@
+import java.util.*
+
+fun use(v: Optional<String>) {
+    v.<caret>ifPresent { value ->  }
+}
+
+fun use2(v: Optional<String?>) {
+    v.<caret>ifPresent { value ->  }
+}

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalIfPresent.txt

@@ -0,0 +1,16 @@
+import java.util.*
+
+fun use(v: Optional<String>) {
+    v.ifPresent { value ->  }
+        // SUCCESS
+        // ORIGINAL:    fun ifPresent((T) -> Unit): Unit defined in java.util.Optional
+        // SUBSTITUTED: fun ifPresent((String) -> Unit): Unit defined in java.util.Optional
+}
+
+fun use2(v: Optional<String?>) {
+    v.ifPresent { value ->  }
+        // SUCCESS
+        // ORIGINAL:    fun ifPresent((T) -> Unit): Unit defined in java.util.Optional
+        // SUBSTITUTED: fun ifPresent((String) -> Unit): Unit defined in java.util.Optional
+}
+

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalOf.kt

@@ -0,0 +1,9 @@
+import java.util.*
+
+fun use() {
+    val x: String? = "x"
+    Optional.<caret>of(x)
+
+    Optional.<caret>of(x!!)
+    Optional.<caret>ofNullable(x)
+}

compiler/testData/resolvedCalls/enhancedSignatures/optional/optionalOf.txt

@@ -0,0 +1,19 @@
+import java.util.*
+
+fun use() {
+    val x: String? = "x"
+    Optional.of(x)
+        // OTHER_ERROR
+        // ORIGINAL:    fun <T : Any!> of(T): Optional<T> defined in java.util.Optional
+        // SUBSTITUTED: fun <T : Any!> of(String): Optional<String> defined in java.util.Optional
+
+    Optional.of(x!!)
+        // SUCCESS
+        // ORIGINAL:    fun <T : Any!> of(T): Optional<T> defined in java.util.Optional
+        // SUBSTITUTED: fun <T : Any!> of(String): Optional<String> defined in java.util.Optional
+    Optional.ofNullable(x)
+        // SUCCESS
+        // ORIGINAL:    fun <T : Any!> ofNullable(T?): Optional<T> defined in java.util.Optional
+        // SUBSTITUTED: fun <T : Any!> ofNullable(String?): Optional<String> defined in java.util.Optional
+}
+