Simplify Stream API call chain inspection improvements: IDEA-179118

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/joining/afterJoiningInitializerWithAppends.java

@@ -0,0 +1,13 @@
+// "Replace with collect" "true"
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class Test {
+  static String test(List<String> list) {
+    String sb;
+    System.out.println("hello");
+      sb = list.stream().filter(s -> !s.isEmpty()).map(String::trim).collect(Collectors.joining("", "1" + 2, ""));
+    return sb.length() == 0 ? null : sb;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/joining/afterJoiningNonLocalBuilder.java

@@ -0,0 +1,11 @@
+// "Replace with collect" "true"
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class Test {
+  static String test(List<String> list, StringBuilder sb) {
+      sb.append(list.stream().filter(s -> !s.isEmpty()).map(String::trim).collect(Collectors.joining()));
+    return sb.length() == 0 ? null : sb.toString();
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/joining/beforeJoiningInitializerWithAppends.java

@@ -0,0 +1,16 @@
+// "Replace with collect" "true"
+
+import java.util.List;
+
+public class Test {
+  static String test(List<String> list) {
+    StringBuilder sb = new StringBuilder().append("1").append(2);
+    System.out.println("hello");
+    for(String s : li<caret>st) {
+      if(!s.isEmpty()) {
+        sb.append(s.trim());
+      }
+    }
+    return sb.length() == 0 ? null : sb.toString();
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/joining/beforeJoiningNonLocalBuilder.java

@@ -0,0 +1,14 @@
+// "Replace with collect" "true"
+
+import java.util.List;
+
+public class Test {
+  static String test(List<String> list, StringBuilder sb) {
+    for(String s : li<caret>st) {
+      if(!s.isEmpty()) {
+        sb.append(s.trim());
+      }
+    }
+    return sb.length() == 0 ? null : sb.toString();
+  }
+}